In the present paper the results of a re-design activity carried out to optimize the crashworthiness properties of an automotive recliner are reported. It is well known, indeed, that the recliner has a central role in determining the passive safety level of the passenger in case of rear impact. For this reason, during the development phase of a new type of recliner it is has been necessary to study also an integrated experimental-numerical methodology to analyze its impact behaviour. Although the preliminary numerical results were satisfying in terms of recliner stiffness and strength, the first full scale tests of rear impact carried out by a sled have pointed out some anomalous behaviours able to degrade the recliner structural performances. To investigate on the causes of the failures, a special strategy of virtual experimentation by means of finite element method has been adopted. The dynamic analysis were performed using an explicit finite element code that incrementally solves the dynamic equilibrium equations by the central difference method and allows to handle, in a robust manner, all the numerical problems associated with geometrical and material non-linearities typical of crash simulations. Numerical results have allowed to identify the causes of the anomalous failures observed during preliminary testing and to define some guidelines for the redesigning of the recliner.
RE-DESIGN OF AN AUTOMOTIVE RECLINER BY CAD/CAETECHNIQUES AND RELATED EXPERIMENTAL VALIDATION / DE IORIO, Antonio; Grasso, Marzio; Penta, Francesco; Pucillo, Giovanni Pio; C., Verde; A., Salzano. - (2011), pp. 60-71. (Intervento presentato al convegno NWC 2011 - A world of Engineering Simulation tenutosi a Boston nel 23-26 May).
RE-DESIGN OF AN AUTOMOTIVE RECLINER BY CAD/CAETECHNIQUES AND RELATED EXPERIMENTAL VALIDATION
DE IORIO, ANTONIO;GRASSO, MARZIO;PENTA, FRANCESCO;PUCILLO, Giovanni Pio;
2011
Abstract
In the present paper the results of a re-design activity carried out to optimize the crashworthiness properties of an automotive recliner are reported. It is well known, indeed, that the recliner has a central role in determining the passive safety level of the passenger in case of rear impact. For this reason, during the development phase of a new type of recliner it is has been necessary to study also an integrated experimental-numerical methodology to analyze its impact behaviour. Although the preliminary numerical results were satisfying in terms of recliner stiffness and strength, the first full scale tests of rear impact carried out by a sled have pointed out some anomalous behaviours able to degrade the recliner structural performances. To investigate on the causes of the failures, a special strategy of virtual experimentation by means of finite element method has been adopted. The dynamic analysis were performed using an explicit finite element code that incrementally solves the dynamic equilibrium equations by the central difference method and allows to handle, in a robust manner, all the numerical problems associated with geometrical and material non-linearities typical of crash simulations. Numerical results have allowed to identify the causes of the anomalous failures observed during preliminary testing and to define some guidelines for the redesigning of the recliner.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
