| ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ KAWASAKI STEEL TECHNICAL REPORT No.43 ( October 2000 ) Automative Materials and Instrumentation and Process Control ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ |
| Impact Energy Absorbing Capabilities and
Shape Fixabilities of High Strength
Steel
Sheets for Automotive Bodies Tetsuo Shimizu, Takaaki Hira, Eiji Iizuka |
| Synopsis: In order to simultaneously satisfy the conflicting requirements of weight reduction and improved crashworthiness for automotive bodies, the application of high strength steel sheets is effective. For the purpose of making it possible to select material characteristics of high strength steel sheets which produce formed parts with stable shapes or to select shapes for formed parts which have suitable material characteristics for high strength steel sheets, we studied the advance evaluation of impact energy absorbing capabilities as body parts and of shape fixabilities at press forming by means of FEM simulation. As a result, we have made it clear that it is possible to evaluate the impact energy absorbing capabilities as automotive body parts taking the dynamic deformation characteristic of steel sheets into consideration. Furthermore, we have found that the material characteristic which is mainly governing the shape fixabilities changes from yielding strength to tensile strength as the bending radius decreases. |
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