Datapoint Newsletter: Winter '16, Volume 22.1
Control Enterprise Materials Information; ANSA Partnership; New TestPaks for RADIOSS and PolyXtrue; Material Model Validation
Read full postMaterials in simulation
Know your materials
Practical knowledge for simulation professionals who need to understand how material behavior is tested, modeled, and represented in FEA.
Comparison of Crash Models for Ductile Plastics
There is interest in quantifying the accuracy of different material models being used in LS-DYNA today for the modeling of plastics. In our study, we characterize two ductile, yet different materials, ABS and polypropylene for rate dependent tensile properties and use the data to develop material parameters for the material models commonly used for plastics: MAT_024 and its variants, MAT_089 and MAT_187. We then perform a falling dart impact test which produces a complex multi-axial stress state and simulate this experiment using LS-DYNA. For each material model we are able to compare simulation to actual experiment thereby obtaining a measure of fidelity of the simulation to reality. In this way, we can assess the benefits of using a particular material model for plastics simulation.
Read full postDatapoint Newsletter: Winter '19, Vol. 25.1
High Humidity Testing, TestCart Online Order System, Matereality Version 12, Upcoming Events
Read full postMatereality-SOLIDWORKS Connectivity
How to import materials into SOLIDWORKS Simulation using the SOLIDWORKS Materials Web Portal powered by Matereality
Read full postDatapoint Newsletter: Spring '10, Volume 16.2
Global Expansion Update. LS-DYNA Support Update. New TestPaks Partner. Photo Documentation of Testing.
Read full postMatereality Webinar: Finite Element Analysis of Additively Manufactured Products
With the growing interest in additive manufacturing in the aerospace industry, there is a desire to accurately simulate the behavior of components made by this process. The layer by layer print process appears to create a morphology that is different from that from conventional manufacturing processes. This can have dramatic impact on the material properties, which in turn, can affect how the material is modeled in simulation. We tested an additively manufactured metal part for mechanical properties and validated the material model used in a linear static simulation.
Read full postDatapoint Newsletter: Summer '19, Vol. 25.3
New DatapointLabs Website; High Temperature Crash Properties
Read full postHigh Speed Stress Strain Material Properties as Inputs for the Simulation of Impact Situations
With the recent changes in the crashworthiness requirements for US automobiles for improved safety, design engineers are being challenged to design interior trim systems comprised of polymeric materials to meet these new impact requirements. Impact analysis programs are being used increasingly by designers to gain an insight into the final part performance during the design stage. Material models play a crucial role in these design simulations by representing the response of the material to an applied stimulus. In this work, we seek to develop novel test methods to generate high speed stress-strain properties of plastics, which can be used as input to structural analysis programs...
Read full postInsights into the Simulation of Failure of Ductile Plastics
Performing simulations that can approximate the material behavior of ductile plastics is daunting. Factors such as nonlinear elasticity, inclusion of volumetric and deviatoric behavior, finding and correctly applying the proper material data to create failure criteria are only a few hurdles. A variety of material models exist, each with numerous settings and varied parameter conversion methods. Combined, these cause a great deal of uncertainty for the FEA user. In previous papers, we delved into material models for both LS-DYNA (MAT089, MAT024, and MAT187) and ABAQUS (*ELASTIC, *PLASTIC) using mid-stage validation as a technique to probe solver accuracy. In this presentation, we summarize our findings on the benefits of this combined approach as a general tool to test and tune simulations for greater reliability.
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