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Automotive Engineering ›› 2021, Vol. 43 ›› Issue (10): 1513-1518.doi: 10.19562/j.chinasae.qcgc.2021.10.013

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Forming Technologies and Crashworthiness Analysis of Automotive Tailor Welded B-pillar

Binbing Huang1,2,Shaopeng Li2,Shucai Xu1,3()   

  1. 1.Key Laboratory of Transport Vehicle Detection,Diagnosis and Maintenance Technology,Jinan  250357
    2.Suzhou Automobile Research Institute(Xiangcheng),Tsinghua University,Suzhou  215133
    3.Tsinghua University,State Key Laboratory Automotive Safety and Energy,Beijing  100084
  • Received:2021-06-17 Online:2021-10-25 Published:2021-10-25
  • Contact: Shucai Xu E-mail:xushc@tsinghua.edu.cn

Abstract:

In order to enhance the crashworthiness of the B-pillar of a new energy vehicle, a tailor welded B-pillar structure is adopted, and starting with forming process and structural crashworthiness, the structure of tailor welded B-pillar is modified based on Dynaform forming simulation and LS-dyna collision simulation. In stamping forming numerical simulation, the influences of forming limit, thickness change and strain state of tailor welded B-pillar on wrinkling and cracking in forming process are studied. By controlling process parameters and modifying die structure, the occurrences of such defects are avoided. As a result of modification, on the premise of meeting the side impact regulations, the mass of B-pillar reduces by 17.5%, its maximum intrusion and maximum acceleration in side impact reduce by 14.38% and 19.3% respectively.

Key words: tailor welded B-pillar, forming technologies, crashworthiness analysis