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FEKO Webinar: Taking Radar Cross Section (RCS) to the Next Level

Based on practical examples, this webinar will offer a guided tour through computational methods to determine Radar Cross Section (RCS), from objects of just a few wavelengths, to objects of thousands of wavelengths in size.

FEKO Webinar: EMC Simulation of Automotive, Aerospace & Other Applications with FEKO

This webinar recording provides an overview of features, applications and real use-cases where FEKO is used for EMC simulation, including emissions, immunity, lightning effects, High Intensity Radiated Fields (HIRF), Electromagnetic Pulses (EMP), shielding effectiveness and radiation hazard

FEKO Webinar: The Use of Model Decomposition and Equivalent Sources for Faster Simulation

System level simulation often involves multiscale type problems, where the structure might be electrically large while also containing details which are significant to the RF performance. These types of simulations can typically require large computational resources. Model decomposition enables these problems to be solved in two steps by using an equivalent (simulated or measured) representation of the transmitting or receiving antennas. Significant reductions in computational requirements can be achieved with this approach.

FEKO for Rotorcraft

FEKO is well-suited for rotorcraft electromagnetic applications including antenna placement, rotor blade modulation, co-site interference, electromagnetic interference (EMI), electromagnetic compatibility (EMC) and radar cross section (RCS).

FEKO Webinar Recording: Accelerate Complex Platform Modelling and Simulation with HyperMesh and FEKO

FEKO is the most used and recognized electromagnetic simulation software for antenna placement, EMC and RCS of platforms, including aircraft, vehicles, ships, satellites and missiles. The clean up of the model can be tedious, depending on the quality of the CAD data. In this webinar we demonstrate the workflow of an aircraft EMC use-case focusing on High Intensity Radiated Fields (HIRF). The advantages of using HyperMesh to clean up a model will also be highlighted. FEKO will be used to set up the simulation and show the desired results.

Resource Scaling for Antenna Placement Modeling on a SAAB JAS-39 Gripen Aircraft

This white paper demonstrates how resource requirements scale for the computational electromagnetic modeling of a modern fighter aircraft when the frequency increases. It also demonstrates how different simulation methods may be applied and how they scal relative to each other

Cross-Coupling between a 3G Transmitter & a Cable Bundle

This white paper demonstrates how the cable modeling interface in FEKO was used to compute cross-coupling effects between a cable bundle and 3G antenna mounted on a vehicle.

3Dプリンターの能力を最大限に引き出すAltair のトポロジー最適化テクノロジー

1980年代後半にその手法が提案され、1993年に構造解析プログラムであるHyperWorks OptiStruct に導入されたトポロジー最適化は、工学的に有意な生物学的構造を作り出すことが可能な手法であり、このテクノロジーを適用することにより、従来設計手法の難点を克服し、3D プリンターの特性を活かすことのできるコンセプトデザインを創出することが可能となった。
-「機械設計 5月号」第60巻 第7号掲載

FEKO Student Competition Winner 2015 Webinar: Design of Platform-mounted HF Antennas with Enhanced Bandwidth using CMA

For the first time, the winning entry for the 2015 FEKO Student Competition is presented in a webinar format. Professor Nader Behdad from the University of Wisconsin-Madison will present his winning student, Ting-Yen Shih's entry.

FEKO Webinar Recording : Designing with Characteristic Mode Analysis (CMA)

Characteristic Mode Analysis (CMA) gives insight into the fundamental resonant behaviour of a structure. This helps engineers to follow a systematic design approach, making use of the parameters calculated with CMA. This webinar covers the latest in FEKO's CMA solver. The webinar starts with a discussion about typical workflows for CMA simulations, giving a better understanding of when and how CMA is best used. Then some recent CMA applications are reviewed and concluding with some exciting new CMA features.

FEKO : Helping to Understand the Universe

The Square Kilometre Array (SKA) : Cutting edge technology, design and innovation

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mmWave Substrate Lens Antenna for Wire Communications

Wu et. al. [1] proposed designs for both single and multi-beam mmWave circularly polarized substrate lens antennas in 2001. This white paper demonstrates these designs via FEKO modeling.

mmWave Axial Choke Horn Antenna with Lens

Millimeter wave (mmWave) antennas operate in the band of frequencies where the wavelength is between 10mm and 1mm. The frequency range for mmWave application is thus constrained to be greater than 30 GHz, but less than 300 GHz. Various applications exist in this frequency range, including wide band telecommunication and imaging applications for security screening. This white paper demonstrates how an antenna was designed for communication at 60 GHz.

HyperMesh / HyperView最新版紹介ウェビナー - HyperWorks14.0

モデリング・ビジュアライゼーション ソフトウェアであるHyperMesh、HyperView、HyperGraphなど、HyperWorks Desktop製品群の最新機能ならびに改善点について
*2016年3月3日に開催されたウェビナー「Altair製品 最新版 ウェブ発表会 2016 HyperMesh / HyperView編」で使用した資料およびその録画です。

Numerical Methods in FEKO

FEKO offers a wide spectrum of numerical methods and hybridizations, each suitable to a specific range of applications. Hybridization of numerical methods allows large and complex EM problems to be solved.

FEKO Webinar Recording: Time Domain Responses from Frequency Domain Results

Frequency domain results can be transformed to obtain time domain responses. This webinar will cover the signal setup in POSTFEKO and how it relates to the frequency domain specification in CADFEKO.

SimLab最新版紹介 - HyperWorks 14.0

SimLabはフィーチャーベースの有限要素モデリングソフトウェアです。最新バージョン14.0で搭載される新しいGUIのほか、画期的な新機能について、デモを交えて紹介しています。
*2016年3月4日に開催されたウェビナー「Altair製品 最新版 ウェブ発表会 2016 SimLab編」で使用した資料およびその録画です。

OptiStruct最新版紹介 - HyperWorks14.0

OptiStructは静荷重および動荷重下の線形および非線形構造の問題に対応する構造解析ソルバーです。弾塑性解析や接触解析における新機能、ラティス構造最適化の強化内容などについて紹介しています。
*2016年3月7日に開催されたウェビナー「Altair製品 最新版 ウェブ発表会 2016 OptiStruct編」で使用した資料およびその録画です。

RADIOSS最新版紹介ウェビナー - HyperWorks14.0

RADIOSSは動荷重下での極度な非線形の問題に対応する優れた構造解析ソルバーです。より強化された非線形解析機能(接触、破壊モデル、複合材モデル、ホットスタンピング、新時間ステップなど)を紹介しています。
*2016年3月8日に開催されたウェビナー「Altair製品 最新版 ウェブ発表会 2016 RADIOSS編」で使用した資料およびその録画です。

MotionSolve最新版紹介ウェビナー - HyperWorks14.0

MotionSolve 14.0における3次元接触のためのメッシュ取り扱いの注意点、および、MotionView 14.0での接触設定の機能強化を紹介します。
*2016年3月10日に開催されたウェビナー「Altair製品 最新版 ウェブ発表会 2016 MotionSolve編」で使用した資料およびその録画です。

AcuSolve最新版紹介ウェビナー - HyperWorks14.0

のAcuSolve 14.0では、チュートリアルマニュアルが格段に充実し、問題設定の背景を含め、AcuSolveの機能をより楽に学習できる環境が整いました。
*2016年3月9日に開催されたウェビナー「Altair製品 最新版 ウェブ発表会 2016 AcuSolve編」で使用した資料およびその録画です。

HyperForm / HyperXtrude最新版紹介ウェビナー - HyperWorks14.0

HyperWorks 14.0では、生産技術系のアプリケーションも新たな進化を遂げています。本セミナーでは、HyperForm / HyperXtrude両製品の新機能を中心に紹介しています。
*2016年3月11日に開催されたウェビナー「Altair製品 最新版 ウェブ発表会 2016 HyperForm / HyperXtrude編」で使用した資料およびその録画です。

FEKO最新版紹介ウェビナー - HyperWorks14.0

FEKO 14.0では、モーメント法(MoM)およびマルチレベル高速多重極法(MLFMM)で曲線状のワイヤセグメントメッシュをサポートします。
*2016年3月14日に開催されたウェビナー「Altair製品 最新版 ウェブ発表会 2016 FEKO編」で使用した資料およびその録画です。

Automotive Radars - Antenna Design, Integration & Channel Modeling

One of the key enabling technologies in the development of autonomous vehicles is driving aid radar systems. We will highlight some of the typical challenges experienced during the design and integration of automotive radars, as well as the applicable numerical solutions that FEKO offers. Radar channel modelling with WinProp is also presented.

FEKO Webinar: Automotive Radar Design & Integration at 76 - 77 GHz

This webinar covers several techniques and approaches which highlight how FEKO can be applied for efficient and accurate simulation of the radar antenna design as well as the integration aspects, including radome and bumper effects.

FEKO Demonstration

See the demonstration of the FEKO product line in action. In this demo, a model will be run through the CADFEKO pre-processor, solved with the FEKO solver, and post-processed with POSTFEKO.

FEKO 14.0 Overview

See an overview of the new features available within FEKO in 14.0. HyperWorks 14.0 is the first version containing the FEKO product line.

From Radar Waves to Road Safety

From the moment radar was first invented, it has proved its value in collision avoidance - first at sea, then in the air and later on the road. This white paper gives an overview of the development that has taken place.

Defence or Civil Radar – it’s a Matter of Wave Propagation

Radar development was essentially motivated by military needs during the second world war, where radar use founded dozens of applications for instance navigation, aircraft location, enemy ship detection, anti-collision, and weather forecast. This white paper discusses the design challenges faced and the solutions available.

Comprehensive Electromagnetic Analysis and Design

Altair offers a comprehensive suite for electromagnetic (EM) analysis and design. FEKO®, WinPropTM and Flux® form part of the HyperWorks Suite, and are widely used to solve a broad range of electromagnetic problems from static to high frequencies.

FEKO Webinar: Wave Propagation and Radio Network Planning Simulation with WinProp

The rapid growth of mobile and wireless communications has significantly increased the need for propagation modelling and network planning simulation. This webinar will introduce how WinProp fits into the electromagnetic simulation offering of HyperWorks, including the future plans in connection with FEKO.

Analysis of Thermal Stress on Motors - Efficient Multiphysics Tools for Thermal Analysis

In this article published in the Magnetics Technology 2017 edition, we look at the application of efficient multiphysics tools for thermal analysis.

Reflector Antenna with Circular Horn Feed — Analyzed with Ray Launching Geometrical Optics (RL-GO)

FEKO includes several computational methods for the efficient analysis of different antenna types. Here, a large problem is solved with the full-wave and asymptotic methods. Model decomposition is used to simulate the problem more efficiently.

FEKO Webinar: Feature Extension & Automation in FEKO through Scripting

The powerful scripting capabilities in FEKO provides users with the means to extend the features available in the interface. Tasks and calculations that need to be performed repeatedly can also be automated allowing users to save time. In this webinar the scripting language (Lua) and the available scripting capabilities in FEKO will be briefly introduced.

Cable Harness EMC/EMI: Cross Talk, Radiation, Interference & Susceptibility

Bundles of electrical cables in vehicles, aircraft, ships and buildings pose electromagnetic compatibility and interference challenges to the electrical design engineer. Due to their lengths, they are more likely to radiate or pick up irradiation than many other electrical components and systems. Through several examples, this white paper will discuss how those challenges can be met with the aid of electromagnetic simulation.

How to use FEKO with HyperMesh

This document applies to FEKO 14.0 and HyperMesh 14.0. Users who would like to make use of the benefits of the advanced meshing features of HyperMesh while solving the electromagnetic aspects of the problem in FEKO, have several options to transfer the mesh from HyperMesh to CADFEKO. This document provides the recommended options and a brief description of how to complete the model setup in CADFEKO.

Radar Cross Section of Aircraft with Engine Inlets

At radar frequencies, 1GHz and above, asymptotic methods are usually preferred to calculate the radar cross section (RCS) of targets like aircraft, since the main parts of the target are more than an order of magnitude larger than the wavelength. The challenge is how to combine these methods to compute the RCS. In this white paper the two-step method that obtains accurate results in limited time is detailed.

Overcoming Challenges in 5G Antenna Design, Radio Coverage & Channel Analysis with FEKO & WinProp

This webinar will show how FEKO and WinProp can be used for the 5G antenna design, analysis of radio coverage and channel statistics including the antenna effect. This allows the requirements to be derived for the 5G antennas, as well as strategies for the 5G network deployment, including the 3.5 GHz frequency bands for area-wide high data rate services and the 26-28 GHz bands for capacity hotspots.

Key Benefits of Combining Measurements with Simulations for Antenna & EMC Applications

Altair has been working with Microwave Vision Group (MVG) for many years on the combination of measurements done with MVG antenna measuring systems with FEKO simulations. This webinar will explain how such a combination represents an alternative solution for antenna manufacturers to share data with device and platform manufacturers without exposing their IP.

HyperForm 日本語データシート

HyperForm は、業界で実績のある包括的な有限要素ベースのシートメタルフォーミングシミュレーションフレームワークであり、成形プロセスを再現するための一連のシミュレーションツール群です。

【Altair情報誌】Concept to Reality Winter/Spring 2016(日本語版)

米国本社Altair Engineering, Inc.が発行する技術情報誌「Concept to Reality」の翻訳記事です。-イノベーションを実現し続けて30 周年 / 3Dプリンティング人工衛星コンポーネント / ネバダ大学は、いかにしてスーパーコンピューターを導入、活用できたのか / Jaguar Land Rover 社が環境にやさしいアルミニウムボディに移行 / 設計の可能性を広げるIoT 革命 / 2016年発行

Accelerate your Creativity with Flux 12.2

The new version of Flux software brings many new features that will accelerate the engineer’s creativity when designing electric equipment or electromechanical devices. Improvements in 3D modeling, post-processing and transient solving can be seen as well as a faster simulation process. This version allows users to take full advantage of Altair’s unique licensing system. Together with the new connections to various Altair tools, it allows for optimization studies, coupling with vibro-acoustics and system-level analysis.

Flux Webinar: Green Taxiing Application

Understand FEM design concepts behind building a Green Taxiing System and other similar electromechanical devices to help airlines save on fuel costs and cut C02 emissions.

Flux Webinar: Starter Motor Design - Generator

Watch this recorded webinar to learn how Flux can help with designing Starter Motors.

Flux Webinar: Design of Electromagnetic Actuators with Flux & Optimization

During this 30 minute on-demand webinar discover how actuators are replacing standard hydraulic motors and how to optimize your design.

FEKO Webinar: An Introduction to FEKO

This webinar is aimed at new users of FEKO. Topics covered include the user interface, model set-up,solver selection, tips and tricks, as well as demonstrations.

FEKO Student Competition Winner 2016 Webinar: Embedded Element Pattern Beam Model for Murchison Widefield Array

Daniel Ung's entry was selected as the winner of the 2016 FEKO Student Competition. A precursor to the Square Kilometre Array (SKA), the Murchison Widefield Array (MWA) radio telescope was constructed in the Murchison Radio-Astronomy Observatory in Western Australia. In this one-hour webinar Daniel presented his report detailing how he made use of FEKO.

FEKO Webinar: Design Optimization with FEKO & HyperStudy

Solving complex design problems with an approach based on intuition can be challenging, especially when multiple design parameters interact with one another and several design goals are targeted. Join us for this webinar in which we will present a brief summary of different optimization methods, together with workflow demonstrations to set up a design.

FEKO Webinar: Efficient Antenna Array Modelling

FEKO contains various techniques for the efficient modeling of antenna arrays during the design process. The application and advantages of techniques such as periodic boundary conditions (PBC), the domain Green's function method (DGFM) and equivalent sources for efficient array modeling are demonstrated in this webinar.

Antenna Design Methodology for Smartwatch Applications

Smart devices have touched and enhanced all aspects of our lives, from the way we conduct business to the way we relax at the end of the day. Designing antennas for wearble devices presents a unique set of challenges. In this technical article from Microwave Journal, these issues are discussed.

Flux Webinar: Electric Machine Design Workflow for Traction Applications

Nowadays, when modeling motors for electric vehicles, more and more constraints are to be fulfilled at the same time. The motor has to be very efficient, less noisy, avoid vibration and at the same time - not too hot and very cheap. In this webinar we will show the different tools available from pre-design, fine tune electromagnetic analysis, NVH analysis, to thermal analysis and system analysis.

Electromagnetic Simulation Growth in the Product Development Cycle

Product development is becoming more challenging due to stricter regulations, and reduced development times and budgets for prototyping and testing. The necessity to add more electronics into new products is making their design more challenging and sensitive to electromagnetic phenomena and effects. This 40 minute webinar will show how different EM software tools are used in different processes and workflows to tackle these product design challenges.

Flux Webinar: Efficient Solutions for EM Design Exploration and Optimization

In this webinar we will demonstrate how Altair HyperStudy, HyperWorks’s multi-disciplinary design exploration tool coupled to Flux can help engineers in the design of high-performance products and reduce cost and the development cycle.

Flux Webinar: Improving the Manufacturing Process with Efficient Induction Heating Applications

Heat Treatment is widely used in different industries in different manufacturing processes, such as heating, brazing, hardening, welding, sealing, etc. and in industries, such as food, energy or transportation. In this webinar, we will show you how Flux simulations can efficiently help to design, analyze and optimize the heat treatment process and equipment.

Flux Webinar: Sensor and Actuator Design for Transportation Applications

In this webinar we discuss and illustrate how electromagnetic simulating technology enables a flexible new alternative solution for electromagnetic transmission, with electromagnetic couplings replacing mechanical and differential couplers.

Design and Analysis of a Proximity Fuse Antenna for an Air Defence Missile

This white paper is an example of how Antenna Magus can be used to generate antennas for antenna placement studies in FEKO.

Metamaterials in FEKO

A description of how metamaterials may be modeled in FEKO followed by guidelines regarding the different simulation options.

FEKO Webinar: The Growing Role of EM Simulation for Connected Vehicles and e-Mobility

This webinar will show how FEKO and WinProp are used to solve design and validation challenges related to: (a) Connected vehicles, including antenna integration aspects. The use of virtual drive tests to reduce the costs and time of extensive road tests being done to study and analyze new connected vehicle functions, and (b) Wireless power transfer systems and electromagnetic compatibility aspects which are key on electric and hybrid vehicles

Flux 12.3 New Features

Overview of the new features in Flux 12.3

Click2Cast 日本語データシート

Click2Castは、製造部品の改良や最適化を可能にする鋳造プロセスシミュレーションソフトウェアです。

solidThinking Composeデータシート

solidThinking Composeにより、エンジニア、科学者、製品クリエイターは、高度なマトリクスベースの数値計算言語とインタラクティブな統合プログラミング環境を使って、多彩な数値計算や自動化が可能になります。

Combining Near-Field Measurement and Simulation for EMC Radiation Analysis

Electronic components are required to comply with the global EMC regulations to ensure failure free operation. Currently, EMC measurements in certified institutes are mandatory to certify performance complies with regulations.This paper describes a practical method of combining near-field measurements and simulations to explore the radiation behavior of electronic components.

Nelson Mandela University: Designing a Winning Eco-Car

Martin Badenhorst, Masters Student at Nelson Mandela University, Port Elizabeth, South Africa, shares how he managed to reduce the weight of their eco-car by 20%.

Approaching Learning Differently at Nelson Mandela University in South Africa

Watch this short video to find out how the Faculty of Engineering is approaching teaching differently with the help of Altair's learning tools.

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Bowtie Antenna

This paper illustrates that FEKO can be applied to the simulation of planar antennas with bowtie antennas as an example.

Conformal Multi-Band Patch Antenna

Simulating the Planar and Curved Antennas in FEKO

Two Arm Spiral Antenna

A two-arm self-complementary archimedean spiral antenna is modelled in FEKO to determine its wideband behaviour.

Modeling of a Magic Tee Waveguide Coupler

A short depiction of FEKO‘s waveguide capability with a magic T coupler as example.

Advanced Radar Cross Section (RCS) Visualization with POSTFEKO and Lua Scripting

This white paper demonstrates how Lua scripts in POSTFEKO may be used to produce advanced visualizations of RCS data that was computed in FEKO.

A Thin, Low-Profile Antenna Using a Novel High Impedance Ground Plane

The size of the antenna for a given application does not depend purely on the technology but on the laws of physics where the antenna size with respect to the wavelength has the predominant influence on the radiation characteristics.

Horn-Fed Reflector Antenna

A horn-fed parabolic reflector is modeled in FEKO to determine its radiation pattern.

Cassegrain and Gregorian Reflector Antenna Modeling with MLFMM LE-PO Hybrid Solvers

This white paper demonstrates that the MLFMM-LE-PO hybrid formulation is a very efficient and accurate method for analysis of large reflector antennas.

Microstrip Bandpass Filter

A microstrip bandpass filter is modeled in FEKO to determine its S-parameters.

Designing an LTE Base Station Antenna with the Finite Arrays Method

This white paper demonstrates how an LTE base station antenna may be modeled with the finite arrays (DGFM) method in FEKO.

Modeling & Analysis of Anechoic Chambers

A white paper demonstrating how FEKO models were used during the design stages of an anechoic chamber that operates in UHF ranges.

MRI Birdcage Coil Design

An application note on the modelling of a 7T MRI birdcage headcoil in FEKO.

Probe-Fed Stacked Annular Ring Antenna

This example illustrates how a probe fed stacked annular ring antenna may be simulated in FEKO.

Radar Cross Section (RCS) Measurement and Simulation of Generic Simple Shapes

RCS targets including the NASA almond, ogive, double-ogive, cone-sphere and cone-sphere with gap were constructed and the RCS was simulated. Simulation data is compared to measured data in open literature.

Flux Webinar:Cutting Edge Electromagnetic LF Simulation Solutions - Discover Flux 2018 & Couplings to the HyperWorks Platform

Using breakthrough technologies, Flux is the perfect tool for the analysis, design and optimization of modern applications such as electric rotating machines, actuators and sensors, high power electrical equipment, heat treatment or electromagnetic compatibility.

Flux Webinar: Accelerate your Design Process with Flux - Dealing with Complex 3D CAD Models

In this webinar discover all the capabilities of the Altair pre-processing tools to handle real complex cases with Flux. In addition we explore the powerful features of HyperMesh allowing you to to defeature, modify and manage your complex assemblies. We also explore the various functionalities in SimLab which will allow you to easily mesh large problems.

Case Study: Carriots improves energy performance and profitability of Unatec

Unatec, a company with over 10 years in energy solutions consulting, faced the challenge of controlling costs and improving production for energy producers. Uncontrolled costs and incorrect predictions can greatly diminish profits, potentially incurring losses.

Carriots optimizes fleet management at Boyaca

Boyacá has been handling the daily delivery of newspapers and magazines in Spain for more than 35 years. Fulfillment of time schedules is essential for customer satisfaction and late deliveries can result in additional costs. Boyacá needed to have direct real-time information on arrival and departure times at each hub of the distribution chain in order to control costs with the lowest possible investment. Several hundred trucks are used for delivery every day.

A shell facet model for preliminary design of cylindrical composite structures

The laminated composite lay-up design typically involves trade-offs between material selection, thickness of the layer, orientation of the layers, and the stacking sequence. Finding the right structural concept early in the design process leaves resources for the detailed design. Many structural members made of laminated composite materials have the form of thin walled cylindrical shells that are prone to buckling. Thus it is desirable to find structural designs that satisfy global requirements for structural stability early in the design phases. In this work, thin-walled cylindrical composite shells under different loading conditions have been studied for structural stability. The simulation is performed with a shell facet model implemented in the ESAComp software. Preliminary design tools for structural stability of thin-walled cylindrical composite shells are demonstrated and discussed.

Design-Optimization of a curved layered composite panel using efficient laminate parameterization

Layered composites have proven essential for the successful design of high-performance space structures. The aviation industry are increasingly using more and more layered composites within commercial aircraft, replacing traditional aluminum designs, to achieve weight savings. When optimizing layered composite structures it is desirable to find design solutions that satisfy global requirements early in the design phases. Particularly because of the number of design variables associated with composite layups once models become more detailed are complex:

Preliminary design of a wing spar bonded joint PrintE-mail

Fast tools such as the ESAComp module for bonded joints can be very efficient in the preliminary design of various joint configurations. In this example we consider a tip loaded wing of a small aircraft or wind turbine blade. The wing spar carries a constant in-plane shear (Nxy), which needs to be transferred from the joint laminates to the shear web.

Using Experimental Test Data In The Analysis Of Laminated Structures

Composite material systems have relatively large variation in their measured properties. A typical approach in engineering problems is deterministic, however. Material stiffness and strength, for example, are described with single values in linear-elastic analyses. Physical dimensions of the material, structural and environmental conditions in the laminate or uncertainties in material properties, for instance, require that several discrete definitions are needed for the material specification.

Design Optimization Of A Composite Car Body

This paper describes how a carbon fiber reinforced plastic body of a future city car was optimized to minimize weight. The frame includes numerous parts, some of which have a simple constant laminate structure and some are more complex having additional local reinforcements. The body must meet the different stiffness and load carrying constraints set by the various load cases.

Design-Optimization Of Cylindrical, Layered Composite Structures Using Efficient Laminate Parameterization

For many years, layered composites have proven essential for the successful design of high-performance space structures, such as launchers or satellites. A generic cylindrical composite structure for a launcher application was optimized with respect to objectives and constraints typical for space applications. The studies included the structural stability, laminate load response and failure analyses. Several types of cylinders (with and without stiffeners) were considered and optimized using different lay-up parameterizations. Results for the best designs are presented and discussed.

Pressure vessels: The composite solution from ComposicaD and ESAComp

With composite pressure vessels foreseen as a significant industrial growth sector, Mike Skinner, from Seifert and Skinner & Associates, talks us through their approach and how the composite solution offered by ComposicaD and ESAComp provides efficient design and analysis to meet the emerging markets.

Considering large deflections in panels - ESAComp 4.4 introduces nonlinear analysis

In composite panels with large support spans, deflections are primarily due to bending. Out-of-plane shear can also play a significant role in sandwich structures. While these deformation types are considered in the typically used linear static analyses, the results are not accurate when going beyond the small deflections regime. When a panel is firmly fixed at its edges, it starts to carry loads partly like a membrane already at low load levels. The panel exhibits stress stiffening. Consequently, with an appropriate analysis approach more efficient structures can be designed.

ESAComp meets challenging marine applications

In this article we learn about ESAComp's role in the design-development of a carbon composite RIB "Rigid-hulled Inflatable Boat", the latest project from Dr. Luca Olivari, a naval architect, founder and owner of the Italian company Olivari Composites Engineering.

At the origins of delamination stresses - Free edge analysis gives insight

When you make a tensile test for [±45/0/90]s and [90/±45/0]s laminates you may observe different failure strengths. This may seem first surprising since the laminates are basically the same - only the stacking sequence is different, which should not influence on the in-plane values.

Modern organic architecture with ESAComp

ESAComp software used for the preliminary laminate analysis, to evaluate the structural component behaviour along with the development of the joint system in the Varna Regional Library

Anisogrid Payload Adaptor Structure For Vega Launcher

In the framework of a development project promoted by the European Space Agency (ESA/ESTEC), Airbus Defence & Space (EADS CASA Espacio, ECE) has designed, manufactured and tested a technology demonstrator representative of the payload adaptor (PLA) of VEGA Launcher, by using an anisogrid concept, called anisogrid payload adaptor (APA).

Engineering oriented formulation for laminate lay-up optimization

The concept of elementary laminates is used to formulate the design problem for a laminated composite structure. A parameterized laminate is divided into stacks with periodic patterns of elementary laminates. With elementary laminates desired regularity for the laminate lay-ups is achieved, which is practical for multi-layer laminates. Due to the reduced design space solution time can be considerably reduced. Two laminate lay-up formulation concepts are presented and their performance is evaluated. The design problem used as a reference case involved the optimization of the stacking sequences to maximize plate buckling loads using a genetic algorithm.

PROBABILISTIC LAMINATE ANALYSIS USING ESACOMP SOFTWARE

Engineering design problems include always uncertainties such as variation in material properties or environment, incomplete statistical data to generate input, modelling and human errors. Yet, the design in general relies on single numbers obtained from engineering equations. In case of strength prediction the material strength is derived using statistical methods and the uncertainties is included in the design value (A or B-value).

CFRP Electronics Housing for a Satellite (ESA 2005)

The drive for continuous mass reductions in spacecraft structures has promoted the use of carbon fibre reinforced plastics. CFRP has excellent specific stiffness and strength, which makes it possible to construct lightweight structures. CFRP is typically used in applications where electrical, thermal and radiation protection properties are not decisive.

Transverse shear in Laminate Analysis

This paper describes the method for transverse shear analysis to be applied in the composites design program ESAComp. The correlation of the method to the formulations used in the commercial finite element programs is presented and the results from the selected method are compared to the exact elasticity results. The results show good agreement with the exact solutions for cross-ply and unsymmetric angle-ply laminates. Symmetric angle-ply laminates create bending twisting coupling that the theory cannot accurately model.

Transverse shear in Laminate Analysis

This paper describes the method for transverse shear analysis to be applied in the composites design program ESAComp. The correlation of the method to the formulations used in the commercial finite element programs is presented and the results from the selected method are compared to the exact elasticity results. The results show good agreement with the exact solutions for cross-ply and unsymmetric angle-ply laminates. Symmetric angle-ply laminates create bending twisting coupling that the theory cannot accurately model.

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