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Knowmats is an informal repository of information related to materials and simulation. The information helps simulation professionals perform best-in-class simulation with a better understanding of how materials are represented in FEA and simulation. read more...


Non-Isochoric Plasticity Assessment for Accurate Crashworthiness CAE Analysis. Application to SAMP-1 and SAMP-Light.

A deep understanding of advanced material plasticity and fracture is one of the cornerstones of mechanical engineering to overcome present and future challenges in the automotive industry with respect to lightweight multi-material body solutions. The correct material law selection may imply a design lightweight efficiency improvement of between 10% and 20% depending on the material, component geometry, manufacturing technology and performance requirements. The accurate implementation of the plastic behaviour becomes mandatory when material fracture is a central design parameter. In this paper, the authors propose a clear process to experimentally measure and assess how far uniaxially tested materials are from pure isochoric plastic behaviour. This process will be named Non-isochoric Plasticity Assessment (NPA). In order to illustrate the process, NPA will be applied to actual experimental results of representative automotive metals and thermoplastics. Material plastic dilation behaviour is studied. A general description is provided regarding plasticity theory concepts required for the usage of non-isochoric plasticity material laws. An approach for the validation of the experimental input data consistency for both SAMP-1 and SAMP-Light material laws is also proposed. The overall approach is finally applied and validated on an extruded aluminium and a thermoplastic showing a proper level of correlation between CAE and experimental results for shell-based FE-models.

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Plastics Metals Automotive Structural Analysis LS-DYNA


Datapoint Newsletter: Summer 2021, Vol. 27.2

DatapointLabs Poised for Growth after Move

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Density Rheology Thermal Mechanical Newsletters


Datapoint Newsletter: Spring 2021, Vol. 27.1

DatapointLabs Will Move, Summer '21; Get Your Testing in Now. Partner Showcase: Altair

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High Speed Testing Structural Analysis Composites RADIOSS Newsletters


Influence of Material Scatter to Simulation Results with ALTAIR RADIOSS

Presented by Marian Bulla, Altair Engineering, at the CARHS Automotive CAE Grand Challenge 2020.

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Nonlinear Material Models Structural Analysis RADIOSS Presentations Validation


Datapoint Newsletter: Summer '20, Vol. 26.2

Full Composites Testing Capabilities

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Aerospace and Defense Automotive Structural Analysis LS-DYNA Abaqus DIGIMAT Composites Newsletters Altair HyperWorks


Datapoint Newsletter: Spring '20, Vol. 26.1

DatapointLabs Celebrates 25 Years

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Mechanical Plastics Metals Automotive Structural Analysis Moldflow LS-DYNA Abaqus ANSYS Moldex3D Newsletters Validation Altair HyperWorks


Datapoint Newsletter: Summer '19, Vol. 25.3

New DatapointLabs Website; High Temperature Crash Properties

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Density Rheology Thermal Mechanical Plastics Automotive High Speed Testing Injection Molding Structural Analysis LS-DYNA ANSYS DIGIMAT Composites Newsletters Validation


Verification & Validation of LSDYNA Simulations

Interactive, online training course offered by www.lsdyna-online.com.

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Structural Analysis LS-DYNA Validation


Datapoint Newsletter: Spring '19, Vol. 25.2

Full metals testing capability added to DatapointLabs test catalog

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Mechanical Metals Automotive Structural Analysis Moldflow LS-DYNA DIGIMAT Composites Newsletters Validation Altair HyperWorks


Improving Simulation Quality with Reliable Materials Methods

Keynote address delivered at NAFEMS seminar on "Material Properties in Structural Calculation: Modeling, Calibration, Simulation & Optimization."

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Structural Analysis Presentations Validation Materials Information Management