Development of automotive plastic pillars for preventing occupant injuries by finite element simulations: The role of material properties

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Development of automotive plastic pillars for preventing occupant injuries by finite element simulations: The role of material properties

Ribeiro, C.J. / Viana, J.C. / Vilaca, F. / Azenha, J.

Safety is nowadays an increasingly important issue for automotive manufacturers. Plastic components, asides from its aesthetic function in the car interior, are required to act as passive safety components. In this work, the impact of an anthropomorphic mass with a given mass and velocity in a plastic pillar cover is simulated by a finite element code (ABAQUS/Explicit). The pillar is modelled as a solid discretised by 3D solid elements. The material's properties (polypropylene) used in the pillar are obtained at high strain-rates and described by an elasto-plastic model, being adopted a maximum allowable strain failure criterion. The contact between the mass, the plastic component and the steel chassis are considered. A complete deceleration-time plot is obtained, being calculated the values of the Head Injury Criteria (HIC(d)) and maximum deceleration. The deformed geometry, resultant stress distribution and damaged zones are also predicted. The properties of the material (elastic modulus, yield stress and allowable strain level) are optimised, making extensive use of numerical simulations and a design of experiments approach, in order to meet the envisaged standards requirements and thus mitigating occupant injuries.

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Document information

Title :

Development of automotive plastic pillars for preventing occupant injuries by finite element simulations: The role of material properties

Additional title:

Entwicklung von Plastikkissen für Autoinsassen zur Vermeidung von Verletzungen mittels Finite-Elemente-Simulation: Die Rolle der Materialeigenschaften

Contributors:

Ribeiro, C.J. (author) / Viana, J.C. (author) / Vilaca, F. (author) / Azenha, J. (author)

Published in:

Advanced Materials Forum IV, Materiais, International Materials Symposium, 4, Encontro Sociedade Portugesa de Materiais, 13 ; 956-960

Materials Science Forum ; 587/588

Publication date :

2008

Size :

5 Seiten, 7 Bilder, 1 Tabelle, 7 Quellen

ISSN :

0255-5476

DOI :