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Determination and Use of Material Properties for Finite Element Analysis: Book Review

by DatapointLabs9,870 views

This book is intended to be a companion to the NAFEMS book, "An Introduction to the Use of Material Models in FE". It informs Finite Element Analysis users of the manner and methodologies by which materials are tested in order to calibrate material models currently implemented in various FEA programs. While the authors seek first to satisfy the basic material models outlined in the companion book, they make important extensions to FEA used in currently active areas including explicit simulation.

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ANSYSAbaqusAerospace and DefenseAltair RADIOSSAutomotiveBiomedicalBook ReviewBuilding MaterialsCAE Vendor/SupplierConsumer ProductsDIGIMATEnergy and PetroleumFoamsFurnitureHigh Speed TestingHome AppliancesHyperelasticIndustrial GoodsLS-DYNAMSC.DYTRANMSC.MARCMSC.NASTRANMaterial SupplierMechanicalMetalsNX NastranNonlinear Material ModelsPAM-COMFORTPAM-CRASHPackagingPlasticityPlasticsRate DependencyResearch LaboratoryRubbersSIMULIASOLIDWORKSStructural AnalysisViscoelasticYielding/Failure Analysis

Software for Creating and Managing Material Specifications 

by DatapointLabs6,941 views

Material specifications define properties for incoming materials to meet required criteria. We present software that manages creation of material specifications, input of properties and material composition; and provides a way to evaluate qualification per specification. While it is designed for OEM/Tier n environments, it is also applicable for materials suppliers.

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ADINAANSYSANSYS FIDAPAbaqusAltair HyperXtrudeAltair RADIOSSAutomotiveB-SimCadmouldDIGIMATLS-DYNAMSC.DYTRANMSC.MARCMSC.NASTRANMoldex3DMoldflowNX NastranPAM-CRASHPAM-FORMPOLYFLOW Blow MoldingPOLYFLOW ExtrusionPOLYFLOW ThermoformingPlanetsXPolyXtruePolycadPresentationsSIGMASOFTSOLIDWORKSSimpoe-MoldT-SimUniversal MoldingVELVISI FlowWinTXS

A Robust Methodology to Calibrate Crash Material Models for Polymers

by DatapointLabs6,875 views

High strain rate material modelling of polymers for use in crash and drop testing has been plagued by a number of problems. These include poor quality and noisy data, material models unsuited to polymer behaviour and unclear material model calibration guidelines. The modelling of polymers is thus a risky proposition with a highly variable success rate. In previous work, we tackled each of the above problems individually. In this paper, we summarize and then proceed to present a material modelling strategy that can be applied for a wide variety of polymers.

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ANSYSAbaqusAerospace and DefenseAltair RADIOSSAutomotiveConsumer ProductsHigh Speed TestingHome AppliancesIndustrial GoodsLS-DYNAMSC.DYTRANMaterial SupplierMechanicalNonlinear Material ModelsPAM-CRASHPackagingPlasticsResearch PapersStructural Analysis

A Novel Technique to Measure Tensile Properties of Plastics at High Strain Rates

by DatapointLabs6,760 views

High strain-rate properties have many applications in the simulation of automotive crash and product drop testing. These properties are difficult to measure. These difficulties result from inaccuracies in extensometry at high strain rates due to extensometer slippage and background noise due to the sudden increase in stress at the start of the test. To eliminate these inaccuracies we use an inferential technique that correlates strain to extension at low strain rates and show that this can be extended to measure strain at higher strain rates

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ANSYSAbaqusAerospace and DefenseAutomotiveConsumer ProductsHigh Speed TestingHome AppliancesLS-DYNAMSC.DYTRANMaterial SupplierMechanicalNonlinear Material ModelsPAM-CRASHPackagingPlasticsRate DependencyResearch PapersStructural AnalysisToys/Sporting Goods

Comments on the Testing and Management of Plastics Material Data 

by DatapointLabs6,670 views

Plastics appeared as design materials of choice about 30 years ago. They brought with them huge design challenges because their multi-variable, non-linear nature was not well understood by engineers trained to work in a linear elastic world. We outline a 20 year journey accompanying our customers in their efforts to understand and simulate these remarkable materials to produce the highly reliable plastic products of today. We discuss challenges related to processes such as injection molding vs. blow-molding; coping with filled plastics; the difficulties of modeling polymers for crash applications. We include our latest findings related to volumetric yield in polymers and its relationship to failure. We describe the material database technology that was created to store this kind of multi-variable data and the analytical tools created to help the CAE engineer understand and use plastics material data.

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ANSYSAbaqusAutomotiveBlow MoldingDIGIMATHigh Speed TestingInjection MoldingLS-DYNAMoldex3DMoldflowNonlinear Material ModelsPAM-CRASHPlasticsPresentationsStructural AnalysisUniversal CrashUniversal MoldingUniversal Structural

High Speed Stress Strain Material Properties as Inputs for the Simulation of Impact Situations

by DatapointLabs6,392 views

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...

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ANSYSAbaqusAerospace and DefenseHigh Speed TestingHome AppliancesLS-DYNAMSC.DYTRANMaterial SupplierMetalsNonlinear Material ModelsPAM-CRASHPackagingPlasticsResearch PapersStructural AnalysisThermoformingToys/Sporting Goods

Material Modeling Strategies for Crash and Drop Test Simulation

by DatapointLabs6,280 views

Many LS-DYNA models are used for plastics crash simulation. However, common models are not designed for plastics. We present best practices developed for adapting common models to plastics, as well as best testing protocols to generate clean, accurate rate-dependent data.

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ANSYSAbaqusAerospace and DefenseAutomotiveConsumer ProductsHigh Speed TestingIndustrial GoodsLS-DYNAMSC.DYTRANMaterial SupplierMetalsNonlinear Material ModelsPAM-CRASHPackagingPresentationsStructural Analysis

Methodology for Selection of Material Models for Plastics Impact Simulation 

by DatapointLabs5,994 views

The volume of plastics that are subjected to impact simulation has grown rapidly. In a previous paper, we discussed why different material models are needed to describe the highly varied behavior exhibited by these materials. In this paper, we cover the subject in more detail, exploring in depth, the nuances of commonly used LS-DYNA material models for plastics, covering important exceptions and criteria related to their use.

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ANSYSAbaqusAerospace and DefenseAltair RADIOSSAutomotiveConsumer ProductsIndustrial GoodsLS-DYNAMaterial SupplierNonlinear Material ModelsPAM-CRASHPackagingPlasticsResearch PapersStructural Analysis

Testing for Crash & Safety Simulation

by DatapointLabs5,851 views

The testing of materials for use in crash and safety simulations and the conversion of test data into material models is a process that is not well standardized in the industry. Consequently, CAE users face uncertainty and risk in this process that can have a negative impact on simulation quality. In this workshop, we present approaches currently used in the US for the gathering of high quality test data plus the acclaimed Matereality CAE Modeler software that is used to transform high strain-rate data into crash material cards.

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ANSYSAbaqusAltair RADIOSSAutomotiveDIGIMATHigh Speed TestingLS-DYNANX NastranNonlinear Material ModelsPAM-CRASHPresentationsSIGMASOFTStructural Analysis