Study on B-Pillar Lightweight of a Micro Electric Vehicle under Side Impact Condition
As the most important supporting structure of B-pillar,B-pillar reinforced panel plays a key role in side impact,so it is of great significance to carry out lightweight research on it while the safety performance meeting the requirements of side impact.According to the test requirements of GB 20071-2006,we established a finite element by HyperWorks,and conducted the simulation analyses basing on Crachfem failure mode.Referring to formability analysis,the weld position was optimized,while the difference of invasion rate and velocity before and after the lightweight of B-pillar was compared.Finally it was verified by the test,the results indicated that during the process of side impact,the maximum invasion amount appeared at the position of R+400mm of B-pillar,which is the chest rib area of human body.The material of B-pillar reinforced panel was changed from DP780 to DP780+B1500HS by laser tailor welding,which not only improved the side impact safety performance,but also realized the lightweight weight reduction of 13.2%.
B-pillar reinforced panelfinite element modellightweightlaser tailor welding
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维普
