Material Insights by CAE Type

Abaqus

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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

Providing an Experimental Basis in Support of FEA 

by DatapointLabs5,865 views

The use of CAE in design decision-making has created a need for proven simulation accuracy. The two areas where simulation touches the ground are with material data and experimental verification and validation (V&V). Precise, well designed and quantitative experiments are key to ensure that the simulation initiates with correct material behavior. Similar validation experiments are needed to verify simulation and manage the risk associated with this predictive technology.

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AbaqusAutomotiveBiomedicalBuilding MaterialsCAE Vendor/SupplierCompositesConsumer ProductsElectonics/ElectricalEnergy and PetroleumFoamsIndustrial GoodsMaterial SupplierMetalsMold Maker/DesignerNonlinear Material ModelsPlasticsPresentationsRubbersSIMULIAStructural AnalysisToys/Sporting Goods

Validating Simulation Using Digital Image Correlation 

by DatapointLabs5,843 views

There is interest in quantifying the differences between simulation and real life experimentation. This kind of work establishes a baseline for more complex simulations bringing a notion of traceability to the practice of CAE. We present the use of digital image correlation as a way to capture strain fields from component testing and compare these to simulation. Factors that are important in ensuring fidelity between simulation and experiment will be discussed.

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AbaqusAerospace and DefenseAutomotiveBiomedicalCAE Vendor/SupplierCompositesElectonics/ElectricalMaterial SupplierNonlinear Material ModelsPlasticsPresentationsSIMULIAStructural Analysis

Use of Digital Image Correlation to Obtain Material Model Parameters for Composites 

by DatapointLabs5,636 views

The development of material parameters for FEA is heavily reliant on precision material data that captures the stress-strain relationship with fidelity. While conventional methods involving UTMs and extensometers are quite adequate for obtaining such data on a number of materials, there are important cases where they have been known to be inadequate. The testing of composites to obtain directional properties remains a complex task because of the difficulty related to measuring these properties in different orientations. Digital Image Correlation (DIC) methods are able to capture the stress-strain relationship all the way to failure. In this paper, we combine DIC and conventional methods to measure directional properties of composites. We exploit the unique capability of DIC to retroactively place virtual strain gauges in areas of critical interest in the test specimen. Utilising an Iosipescu fixture, we measure shear properties of structured composites in a variety of orientations to compute the parameters of an orthotropic linear elastic material model. Model consistency is checked by validation using Abaqus.

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AbaqusAerospace and DefenseCompositesNonlinear Material ModelsResearch PapersSIMULIAStructural Analysis

Material Parameter Calibration Services for Abaqus Non-Linear Material Models

by DatapointLabs6,099 views

DatapointLabs' TestPaks (material testing + model calibration + Abaqus input decks) for rate-dependent, hyperelastic, viscoelastic, NVH, and the use of Abaqus CAE Modeler to transform raw data into material cards will be presented. A representative from Idiada will present a case study explaining the use of DatapointLabs’ material data and TestPaks for simulation.

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AbaqusCompositesFoamsHigh Speed TestingMetalsNonlinear Material ModelsPlasticsPresentationsRubbersSIMULIAStructural 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

Mechanical and Visco-Elastic Properties of UHMWPE for In-Vivo Applications 

by DatapointLabs5,980 views

Ultra-high molecular weight polyethylene (UHMWPE) is used extensively in orthopedic applications within the human body. Components made from these materials are subject to complex loading over extended periods of time. Modeling of components used in such applications depends heavily on having material data under in-vivo conditions. We present mechanical and visco-elastic properties measured in saline at 37C. Comparisons to conventionally measured properties at room temperature are made.

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ANSYSAbaqusBiomedicalBlow MoldingExtrusionInjection MoldingMoldflowNonlinear Material ModelsPOLYFLOW Blow MoldingPOLYFLOW ExtrusionPOLYFLOW ThermoformingPapersPlasticsSIGMASOFTStructural Analysis

Behavior-based Material Model Selection and Calibration of Plastics for Crash Simulation 

by DatapointLabs5,560 views

Many material models are available for 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. In addition, we present a streamlined process to convert raw data to LS-DYNA material cards, and harmonized material datasets that allow the same raw data to be used for other crash and rate-dependent analysis software.

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ANSYSAbaqusAltair RADIOSSAutomotiveHigh Speed TestingLS-DYNANonlinear Material ModelsPAM-CRASHPlasticsPresentationsStructural Analysis