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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.

MRI Birdcage Coil Design

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

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 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.

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.

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.

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.

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.

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).

Metamaterials in FEKO

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

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.

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.

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.

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

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.

Probe-Fed Stacked Annular Ring Antenna

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

Design Innovation for the Medical Industry

Altair helps medical companies across the world achieve product development objectives through its unique approach, which blends CAE simulation software, design creativity and in-depth engineering expertise to achieve optimal product designs.

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

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.

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.

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.

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.

FEKO : Helping to Understand the Universe

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

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.

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 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.

Flux 12.3 New Features

Overview of the new features in Flux 12.3

Horn-Fed Reflector Antenna

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

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.

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.

Cobot, the Collaborative Robot - Get Ready for Industry 4.0

Development tools and methods, such as simulation, are increasingly important to face and address the pressure of innovation. As an example, for successful new design methods and to show how simulation tools are used, Altair developed a virtual demonstrator based on a cobot application. This complex machine interacts with a human operator as the ultimate smart manufacturing equipment - to show how challenges in modern product design can be overcome.

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

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.

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.

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.

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.

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.

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.

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.

Conformal Multi-Band Patch Antenna

Simulating the Planar and Curved Antennas in FEKO

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.

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.

Flux Webinar: Starter Motor Design - Generator

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

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.

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.

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.

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.


This paper presents a newly developed analysis and design module for adhesive bonded joints implemented in ESAComp, software for analysis and design of composite laminates and laminated structures.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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