摘要
建立了考虑预应变和烘烤硬化影响的铝合金流动应力模型.对经历过不同大小、方向预应变和不同烘烤处理的A6111铝合金板料做了不同方向的单拉试验.对比各常用流动应力模型拟合效果后选取H-S模型.对试验和拟合数据进行归纳统计,并分析了各主要影响因素对H-S模型中拟合参数的影响.此流动应力预测模型可帮助提高汽车碰撞仿真的准确性.
The forming history should be taken into consideration to get more precise numeric simulation results in car crash simulations. In this paper the A6111-T4P aluminum alloy sheet metal underwent different pre straining and baking treatment. Then tensile tests were conducted to obtain flow stress curves. The H S flow stress model was selected and key factors influencing the fitting parameters in the H S model were analyzed using the method of inductive statistics based on experimental results. Finally, a novel flow stress model for aluminum alloy related to pre strain and baking was built.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
2013年第11期1680-1684,1689,共6页
Journal of Shanghai Jiaotong University
基金
国家自然科学基金资助项目(51105246)
福特汽车公司URP项目
