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Effect of Element Size and Pre-deformation on Unsafe Zone Structural Finite Element Analyses
Technical Paper
2007-01-0980
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Structural finite element analyses (FEA) are usually performed in two zones - safe zone and unsafe zone related to the status of a structure after loading. Safe zone structural FEA focus on the deformation behavior prediction of a component or a structural system. While unsafe zone structural FEA do not only focus on their deformation behavior but also their failure behavior prediction. As a fatal disaster or a high cost often results from the premature rapture of critical parts, it is very important to predict the catastrophic failure possibility and process of a component or a structural system. Unsafe zone structural FEA is one of the feasible methods making such a prediction possible. In this paper, the deformation behavior and necking process of automotive steels were discussed based on their stress-strain curves obtained from standard tension tests. New material model was developed for high strength (HS) steel through simulating a standard tension test. The effect of element size and pre-deformation was investigated on unsafe zone structural FEA of typical automotive parts. Residual ductility was highlighted for pre-deformed materials. It was found that not only internal energy and reaction force but also failure behavior of a structural component was significantly influenced by element size and pre-deformation.
Authors
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Citation
Zhang, J. and Lambrecht, S., "Effect of Element Size and Pre-deformation on Unsafe Zone Structural Finite Element Analyses," SAE Technical Paper 2007-01-0980, 2007, https://doi.org/10.4271/2007-01-0980.Also In
Modeling, Testing and Design of Materials for Dummies and Structures for Crash Safety Applications
Number: SP-2095; Published: 2007-04-16
Number: SP-2095; Published: 2007-04-16
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