动力蓄电池包挤压失效仿真与实验

为提高动力蓄电池包挤压仿真的精度，将延性损伤准则引入到有限元仿真，通过单轴拉伸试验、纯剪切试验与缺口件拉伸试验与有限元仿真，获得了某动力蓄电池包结构所用材料6061-T6铝合金的延性损伤参数。型材三点弯曲试验、动力蓄电池包挤压试验与有限元仿真的结果表明：输入延性损伤参数的有限元仿真结果与试验结果误差小，能较为准确地模拟铝合金损伤对结构承载性能的影响；不考虑材料失效的结果与试验结果误差较大。

Squeezing Simulation and Experiment of Electric Vehicle Battery Packs

In order to improve the squeezing simulation accuracy of power battery packs, the ductile damage criterion was introduced in FEM simulation. Ductile damage criterion parameters of 6061-T6 aluminum alloy used in an electric vehicle power battery packs were obtained through uniaxial tensile test, pure shear test, notched tensile test, and FEM simulation. Three-point bending test of section product, squeezing test of a electric vehicle power battery packs and the FEM simulation results of the above tests show that the FEM simulation results with inputing ductile damage criterion parameters have little error with tests, and may accurately describe influences of aluminum alloy damage on the load carrying capacity of structure, while the FEM simulation results without material failure have large error with tests.