The effectiveness of the FEM (Finite element method) approach to improve crashworthiness, both from the vehicle viewpoint and from the road safety hardware one has been plainly demonstrated in literature. Of course, this is possible only when models calibrated in a wide range of impact conditions are available. In this work, a multipurpose finite element model of a light weight passenger car is presented. The model has been set up through an extensive comparison between full-scale and simulated outputs of four different experiments: the frontal and oblique collisions against a concrete wall and the impacts against two types of steel barrier with different containment energy level (127kJ and 724kJ). The differences between these impacts are related to (i) the stiffness of the safety devices and to (ii) the height where the vehicle collides against the barriers. Therefore, the considered situations are representative of a wide range of impact conditions The fundamental steps of the modelling process will be described along with all the particulars needed to reproduce the four full scale tests. Data comparison between full-scale and FE simulation concerns time histories of longitudinal and transversal acceleration of CG’s vehicle, ASI, THIV, PHD, pitch and roll angle, velocity variation in the vehicle direction and residual displacements of the barrier.

Development of Validated Finite Element Model of an Articulated Truck Suitable to Simulate Collisions Against Road Safety Barriers

PERNETTI, Mariano;
2007

Abstract

The effectiveness of the FEM (Finite element method) approach to improve crashworthiness, both from the vehicle viewpoint and from the road safety hardware one has been plainly demonstrated in literature. Of course, this is possible only when models calibrated in a wide range of impact conditions are available. In this work, a multipurpose finite element model of a light weight passenger car is presented. The model has been set up through an extensive comparison between full-scale and simulated outputs of four different experiments: the frontal and oblique collisions against a concrete wall and the impacts against two types of steel barrier with different containment energy level (127kJ and 724kJ). The differences between these impacts are related to (i) the stiffness of the safety devices and to (ii) the height where the vehicle collides against the barriers. Therefore, the considered situations are representative of a wide range of impact conditions The fundamental steps of the modelling process will be described along with all the particulars needed to reproduce the four full scale tests. Data comparison between full-scale and FE simulation concerns time histories of longitudinal and transversal acceleration of CG’s vehicle, ASI, THIV, PHD, pitch and roll angle, velocity variation in the vehicle direction and residual displacements of the barrier.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11591/212142
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