摘要
为探究在不均匀速度下高速冲击的不锈钢双极板变形情况及成形规律,结合箔片气化冲击成形的板料速度场分布,运用LS-DYNA建立不锈钢双极板高速冲击成形有限元仿真模型,分析了该成形工艺下不锈钢双极板的动态变形过程,研究了不均匀冲击速度对双极板流道成形质量的影响。结果表明,不锈钢双极板冲击成形的最小初始冲击速度为350 m·s^(-1),流道脊处的减薄率最大,其余部位减薄率小于30%,随着初始冲击速度的增加,双极板成形深度稳定在0.78 mm以上,填充率稳定在95%。但受限于速度场的不均匀性,单次成形有效区域有限,仿真结果表明多道次成形能够形成一致性较好的多通道不锈钢双极板,最后,通过多道次箔片气化冲击成形实验验证了仿真结果。
To investigate the deformation condition and forming laws of stainless steel bipolar plate with uneven high impact velocity,combined with the sheet metal velocity field distribution of foil vaporized forming,LS-DYNA was used to establish the finite element simulation model of high-speed impact forming of stainless steel bipolar plate,and the dynamic deformation process of stainless steel bipolar plate under the forming process was analyzed.The influence of uneven impact velocity on the forming quality of bipolar plate channel was studied.The results show that the minimum initial impact velocity of stainless steel bipolar plate for impact forming is 350 m·s^(-1),the thinning rate at the channel ridge is the largest,the thinning rate of remaining parts is less than 30%.With the increase of intial impact velocity,the bipolar plate forming depth is stable above 0.78 mm,and the filling rate is stable at 95%.However,limited by the uneven of velocity field,the effective area of single forming is limited,and the simulation results show that multi-pass forming can form multichannel stainless steel bipolar plate with good consistency.Finally,the simulation results were validated through multiple passes of foil gasification impact forming experiments.
作者
曾力佳
孟正华
郭佳敏
郭巍
刘维
黄尚宇
ZENG Li-jia;MENG Zheng-hua;GUO Jia-min;GUO Wei;LIU Wei;HUANG Shang-yu(School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China;Hubei Key Laboratory of Advanced Technology for Automotive Components,Wuhan University of Technology,Wuhan 430070,China;School of Automotive Engineering,Wuhan University of Technology,Wuhan 430070,China)
出处
《塑性工程学报》
CAS
CSCD
北大核心
2024年第7期42-51,共10页
Journal of Plasticity Engineering
基金
国家自然科学基金资助项目(52005374)
国家重点研发计划(2022YFB2503501)
湖北省重点研发计划项目(2021BAA174)。
关键词
不锈钢双极板
冲击成形
减薄率
填充率
stainless steel bipolar plate
impact forming
thinning rate
filling rate
