Discovering Optimal Material Parameters and Design Alternatives
Leveraging Isight to develop realistic crash dummy models.
To develop passive vehicle safety systems, leading automotive manufacturers employ physical crash dummies as well as their virtual counterparts. Using accurate digital dummy models provides time and cost savings by reducing reliance on physical testing.
The Abaqus WorldSID 50th percentile (WorldSID50) virtual crash-test dummy model comprises approximately 260,000 elements and more than 20 different materials. Developing this model required evaluations of hundreds of model parameters to achieve good correlation with test data under different loading conditions and rates. Isight, from SIMULIA, played a critical role in the development of the WorldSID50 model. By providing leading technology for process integration, automation and design optimization, Isight enabled users to create simulation process flows (sim-flows) in order to automate the exploration of hundreds of design alternatives to help identify optimal material and performance parameters.
SIMULIA development engineers leveraged Isight to construct a material optimization sim-flow using Prony terms as design variables, which allowed for the estimation of frequency, amplitude, phase and damping. Several Abaqus simulations, representing various loading rates both in tension and compression, were used within the same Isight optimization sim-flow for calibration. Simulation responses were then reconciled with the test data using Isight's Data Matching component.
By automatically fitting material model coefficients to experimental data, engineers succeeded in creating a linear viscoelastic material model to represent the physical dummy's rubber-like components. This produced a configurable virtual dummy that can faithfully replicate the behaviors of rubber-like compounds, super-elastic alloys (Nitinol), foams, plastics and vinyl.
As the Dassault Systèmes brand for Realistic Simulation, SIMULIA delivers a scalable portfolio of realistic simulation applications, including Abaqus for Finite Element Analysis (FEA) and multiphysics simulation; Isight for design exploration and optimization; and Simulation Lifecycle Management for managing simulation data, processes and intellectual property. SIMULIA applications are an integral part of Dassault Systèmes 3DEXPERIENCE platform, which accelerates innovation and reduces product development costs for world-leading manufacturing and research organizations worldwide.
For more details on identifying optimal material properties and design alternatives, read the case study.
Dassault Systèmes, SIMULIA
SIMULIA is the Dassault Systèmes brand that delivers a scalable portfolio of Realistic Simulation applications including Abaqus for unified Finite Element Analysis and multiphysics simulation and Isight for process automation and design optimization. SIMULIA's realistic simulation applications are used as part of key business practices by world-leading manufacturing and research organizations to explore physical behavior, discover innovative solutions, and improve product performance.
Dassault Systèmes, SIMULIA
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