基于Abaqus低密度泡沫模型的EPE冲击仿真模拟  

Impact Simulation of EPE Based on Abaqus Low Density Foam Model

作　　者：雷鹏 付志强[1] 张蕾[1] 徐雅 Lei Peng;Fu Zhiqiang;Zhang Lei;Xu Ya(Tianjin University of Science and Technology,Tianjin 300222,China)

机构地区：[1]天津科技大学

出　　处：《塑料科技》2019年第9期89-94,共6页Plastics Science and Technology

摘　　要：采用数值模拟技术研究了发泡聚乙烯(EPE)在冲击和回弹下的力学性能与形变。首先采用万能材料试验机对EPE进行不同速率下的压缩试验,在此基础上,拟合Sherwood-Frost本构模型参数,然后通过Sherwood-Frost本构模型,计算出应变率范围为0~100 s^-1的应力应变数据,并输入到Abaqus中建立低密度泡沫模型;分别用低密度泡沫模型和Crushable foam模型对EPE进行静态压缩仿真分析,对比验证低密度泡沫模型的回弹性,用质量为3.41 kg的重锤对EPE进行不同高度下的冲击仿真分析。结果表明:在回弹过程中,低密度泡沫模型的载荷位移曲线几乎与压缩阶段重合,而Crushable foam模型发生塑性形变,不能恢复到初始形状;在1 200、760、500 mm高度下,重锤的最大加速度分别为75.38、55.25、37.64 G(G为重力加速度),误差分别为3.32%、1.08%、2.90%。The mechanical properties and deformation of foamed polyethylene(EPE)under impact and springback were studied by numerical simulation.Firstly,the compression test of EPE at different rates was carried out by universal material testing machine.On the basis of these,the parameters of Sherwood-Frost constitutive model were fitted,and then the stress-strain data of strain rate range of 0~100 s^-1 were calculated through Sherwood-Frost constitutive model,and the low-density foam model was built into Abaqus,and EPE was made by using low density foam model and Crushable foam model respectively.The static compression simulation analysis is carried out to verify the resilience of the low density foam model,and the impact simulation analysis of EPE at different heights is carried out with a weight of 3.41 kg.The results show that during the rebound process,the load displacement curve of the low density foam model coincides with the compression stage,while the plastic deformation of the Crushable foam model can not restore to the initial shape.At the height of 1 200,760 and 500 mm,the maximum acceleration of the hammer is 75.38,55.25 and 37.64 G(G is gravity acceleration),and the errors are 3.32%,1.08%and 2.90% respectively.

关 键 词：ABAQUS 发泡聚乙烯 低密度泡沫 回弹 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]