泡沫金属夹芯板的三维建模方法及力学性能模拟

3D Modeling Method and Simulation for Mechanical Properties of Foam Metal Sandwich Panel

详细描述了基于MATLAB软件建立泡沫金属夹芯板三维随机模型的过程,采用ANSYS有限元软件对泡沫金属夹芯板的准静态压缩性能进行了模拟,并与试验结果进行了对比;采用所建立的三维随机模型研究了泡沫铝夹芯板在冲击载荷作用下的动态力学性能。结果表明:采用三维随机模型模拟得到的准静态压缩真应力-真应变曲线整体上与试验结果吻合,均包括弹性阶段、屈服阶段与致密阶段,相对误差小于10%,这验证了模型的有效性与可靠性;在相同初始速度(80,100,200m·s^(-1))下冲击后,孔隙率60%的泡沫铝夹芯板的应力峰值与吸收能量均比孔隙率50%的低;相同孔隙率泡沫铝夹芯板的初始应力峰值、平台应力和吸收能量均随着初始冲击速度的增大而增大。

The establishment of a 3D random model of foam metal sandwich panel based on MATLAB software was described in detail.The quasi-static compression performance of the foam metal sandwich panel was simulated by ANSYS finite element software,and was compared with the test results.The dynamic mechanical properties of the foam aluminum sandwich panel under impact load were studied by the established 3D random model.The results show that the quasi-static compression true stress-true strain curves simulated by the random model were basically consistent with the test results,all having elastic stage,yield stage and compaction stage;the relative error was smaller than 10%,verifying the effectiveness and reliability of the model.After impact at the same initial velocity(80,100,200 m·s^(-1)),the peak stress and absorbed energy of the foam aluminum sandwich panel with porosity of 60%were lower than those with porosity of 50%.The peak initial stress,platform stress and the absorbed energy of the foam aluminum sandwich panel with the same porosity increased with initial impact velocity.