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A Framework for the Calibration and Validation of Multiscale Material Models

by DatapointLabs12,330 views

Multiscale material models are being increasingly applied for high-level simulation of complex materials, such as continuous reinforced material products (unidirectional and woven product forms). These multiscale material models require input data from a minimum of experimental tests, which are then used to characterize a multiscale material model that can be used in structural simulations within a variety of commercial finite element solvers, including OptiStruct, RADIOSS, Abaqus, and LS-Dyna. Using these models, it is possible is to predict the performance of layups from single layer properties, as well as performance of these composites under complex loadings. We present a framework where the required experimental data are collected, including a process for maintaining traceability and consistency of the experimental data using the Matereality software. Experimental test data are transmitted to the HyperWorks Multiscale Designer software for development of an appropriate multiscale material model. The resulting multiscale material model data is stored within Matereality linked to the source experimental data. Different manufactured layups are tested and compared to simulation in a validation step which provides a measure of the solution accuracy.

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AbaqusAltair RADIOSSCompositesLS-DYNAMechanicalNonlinear Material ModelsOptiStructStructural AnalysisValidation

The Role of Material Data in the Simulation of Injection Molded Parts

by DatapointLabs7,475 views

The modeling of material behavior for injection molded plastics is a vital step for good simulation results. We detail the types of material data needed by various injection-molding simulation programs, factors that can affect simulation quality including test techniques and process variables such as moisture content. The case of fiber filled plastics is covered along with the extension to structural analysis applications.

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AbaqusDIGIMATInjection MoldingLS-DYNAMoldex3DMoldflowNonlinear Material ModelsPlasticsPresentationsRate DependencySIGMASOFTSimpoe-MoldStructural AnalysisUniversal MoldingValidationViscoelastic

Mid-Stage Validation as a Process Step in Simulation V&V

by DatapointLabs5,965 views

Physically accurate simulation is a requirement for initiatives such as late-stage prototyping, additive manufacturing and digital twinning. The use of mid-stage validation has been shown to be a valuable tool to measure solver accuracy prior to use in simulation. Factors such as simulation settings, element type, mesh size, choice of material model, the material model parameter conversion process, quality and suitability of material property data used can all be evaluated. These validations do not use real-life parts, but instead use carefully designed standardized geometries in a controlled physical test that probes the accuracy of the simulation. With this a priori knowledge, it is possible to make meaningful design decisions. Confidence is gained that the simulation replicates real-life physical behavior. We present three case studies using different solvers and materials, which illustrate the broad applicability of this technique.

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3D PrintingANSYSAbaqusLS-DYNAMechanicalMetalsPlasticsPresentationsResearch PapersRubbersStructural AnalysisValidation