G. G. Lim

Development of foam models as applications to vehicle interior

In this study, experimental studies were conducted to obtain the properties of various foam materials. Finite element foam models were developed using LS-DYNA3D and the model predictions were validated against the experimental results. Numerous simulations were carried out for foams subjected to different loading conditions including the static compression, indentation, and tensile tests, and dynamic impacts with a featureless and a spherical headform. Comparisons of predicted and experimental results such as the headform response, which were predicted prior to an experimental verification, showed excellent correlations for all the cases. Language: en

A NEW COMPONENT TEST METHODOLOGY CONCEPT FOR SIDE IMPACT SIMULATION

A new component test methodology concept for simulating National Highway Traffic Safety Administration (NHTSA) side impact is described in this paper. The methodology would be used to evaluate the performance of door sub-systems, trim panels and possible safety countermeasures (foam padding, side airbags, etc.). MADYMO software was used to develop the concept and the model was validated with a DOT-SID dummy. The method can also be used for simulating the European procedure, with some modifications. The method uses a combination of HYGE and VIA decelerator to achieve the desired door velocity profile from onset of crash event until door-dummy separation, and also takes into account the various other factors such as the door/B pillar-dummy contact velocity, door compliance, shape of intruding side structure, seat-to-door interaction and initial door-dummy distance.

DYNAMIC DOOR COMPONENT TEST METHODOLOGY

This paper describes the development of a Dynamic Door Component Test Methodology (DDCTM) for side impact simulation. A feasibility study of the methodology was conducted using a MADYMO computer model by taking parameters such as pre-crush, door-to-SID (Side Impact Dummy) contact velocity and the decelaration profile into consideration. The prove-out tests of this methodology was carried out on a dynamic test facility. The DDCTM has been validated for various carlines. In addition, various existing dynamic component test methods are reviewed. The DDTCM significantly reduces the time and resources required for developing improved side impact protection systems, including new door/trim, side air bag systems and padding material evaluation. For the covering abstract of the conference see IRRD 875168.