Gissmo Failure Modelling for Crashworthiness Analysis Using Different Test Specimens

Abstract

The demand for lightweight products to reduce CO2 emissions and high safety requirements is an increasing trend, especially in the vehicle and electrical appliance industry. The use of high-strength steels instead of conventional mild steels by using predictive modeling methods in finite element analysis plays a major role. Moreover, physical full-scale crash tests are time-consuming as well as expensive. Crash tolerance analysis in the finite element environment depends on the accuracy of the damage and the definition of the material model parameters. This study examines the damage model GISSMO-Generalized Increasing Stress State-induced damage model and the onset of fracture was calculated by sample optimization via finite element analysis in this study. This research presents the modeling of a specific region of the material fracture curve using the different geometric samples. The results of the numerical simulations are validated by comparing the experimental data of the optimized test samples with their measurements.

Keywords

• Gissmo
• Damage
• Mechanical characterization
• Crashworthiness

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