Technical Articles

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High-temperature tests for ceramic matrix composites

By Team Eikosim | 10 April 2020

By Myriam Berny, R&D engineer at EikoSim As a new member of EikoSim team, I was offered the opportunity to present an overlook of my thesis work dealing with high-temperature experiments for SiC/SiC composites, which was carried out in LMT under the supervision of F. Hild and in collaboration with Safran Ceramics under the supervision…

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What is a good speckle pattern DIC?

By Team Eikosim | 19 March 2020

By Clara Minguet, Research engineer at EikoSim Concerned about making a new speckle pattern for you DIC experiment? In another article, we talked about the different techniques for creating a speckle pattern in digital image correlation, including the ability to vary the size and nature of the spots projected on the piece. But what size should…

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How to make a speckle pattern suitable for Digital Image Correlation?

By Team Eikosim | 31 January 2020

By Floriane Soulas, R&D engineer at EikoSim Context The principle of image correlation is based on tracking information from a so-called “reference” image in the following images, often called “distorted images”. All of the images form a film, from which we seek to extract a measure. We can therefore see the correlation of images as following…

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Previsualization with Blender of a complex structural test

By Team Eikosim | 28 May 2019

Written by Matthieu Vitse Matthieu Vitse is a freelance scientific visualization expert. He has a PhD in computational mechanics from ENS Paris-Saclay, and his main activity now focuses on the post-treatment and visualization of large complex data simulations and experiments. More info at www.sciviz.fr (from Vitse et al. Toward virtual design and optimization of a…

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Understanding and controlling the sources of discrepancy between tests and simulations

By Team Eikosim | 1 March 2019

By Renaud Gras, Co founder – CTO of EikoSim Adjustment and validation of simulations Simulations play an enhanced role in the design, the qualification and the certification of industrial products by forming the basis of strategic decisions. Therefore, the role devolved to experimental testing has also been modified. These tests were the essential part of…

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How to preview your test using Blender software?

By Team Eikosim | 16 November 2018

By Pierre Baudoin, R&D engineer of EikoSim Blender as a supporting tool for 3D DIC tests Have you ever heard of Blender to preview a mechanical test? Blender is a comprehensive, open-source, cross-platform 3D creation suite that can be used to create photo-realistic renders, animations, or even full-length movies. Blender’s render engine can produce physically…

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Digital Image Correlation – The basics

By Team Eikosim | 17 October 2018

By Florent Mathieu, CEO of EikoSim Digital Image Correlation (DIC) is a measurement technique that processes pictures taken from cameras to track and record the surface motion of a deforming solid. In the mechanical engineering field, it has been widely used to monitor and process test data in both research and industrial contexts, for applications…

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The digital twin definition: bringing the real world into your simulations

By Team Eikosim | 17 October 2018

By Florent Mathieu, CEO of EikoSim To understand the definition of a Digital Twin, we suggest you put it in the context of product development. To estimate a structure’s mechanical behavior, proactive numerical studies have become common practice in mechanical engineering. Finite element modeling is now involved at all stages of the mechanical design project.…

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Digital Image Correlation, how to choose your acquisition hardware?

By Team Eikosim | 5 October 2018

We have already seen together the principles of digital image correlation and the contributions of such measures. Today we will see how to choose its acquisition hardware so that it is adapted to the different use cases encountered. Image acquisition equipment means the cameras of course, but also the lenses, the lights, the mounting brackets…

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Digital image correlation: The contribution of the global method

By Team Eikosim | 17 August 2018

By Florent Mathieu, CEO of EikoSim Why a “global” method? Digital image correlation consists in measuring a displacement field between a reference configuration and a deformed configuration. There are two large families of algorithms to make this measurement: the subset-based methods repeat a search operation for a battery of subsets positioned on a grid in…