Evaluation of fatigue and noise-and-vibration properties of automobile partial models

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Evaluation of fatigue and noise-and-vibration properties of automobile partial models

Seto, Atsushi / Yoshida, Yuichi / Yamamoto, Toyoki / Kanoko, Shintaro

Application of high strength steel sheets to automotive bodies requires evaluation technologies of fatigue and noise-and-vibration properties with high accuracy. Automobile partial models were used instead of real bodies for investigation of evaluation methods of those properties. Structural stress concentration parameters gave good estimation of fatigue lives to both of spot-welded and arc-welded models. New analysis methods were proposed for better understanding of vibration phenomena in low- and mid-frequency ranges using bonded models of panel-frame and two panels. With the aid of CAE, any of these techniques can be applied to evaluate properties of models of complicated shape under more severe conditions. In order to expand the application of high-strength steel sheets, it is intended to continue improving the precision of the evaluation techniques discussed here.