内部填充泡沫铝的柱壳力学响应数值模拟

针对泡沫铝及其填充圆柱壳的变形模式复杂、理论分析困难的问题,在分析泡沫金属唯象本构模型的基础上,用Bilkhu/Dubois可压缩泡沫模型描述泡沫铝的力学行为,用随机几何缺陷描述结构的可能缺陷形式,采用有限元法对内部填充泡沫铝的圆柱壳结构在轴向载荷作用下的静、动态力学响应进行了数值模拟.数值模拟结果与实验结果较一致,表...

Numerical simulations on mechanical responses of aluminum foam-filled cylindrical shells

Aimed at the difficulty in the theoretical analysis on the mechanical behaviors of aluminum foam-filled cylindrical shells due to the complicate deformation patterns of aluminum foams and shells,the Bilkhu/Dubois crushable foam model was analyzed and then used to describe the macroscopic mechanical behaviors of aluminum foam,random geometric imperfections were used to depict the potential imperfections of the cylindrical shell,and the static and dynamic mechanical responses of the aluminum foam-filled cylindrical shells were simulated by FEM.The numerical simulations are in good agreement with the experimental data.It shows that the Builhu/Dubois crushable model can be used to describe the mechanical behaviors of aluminum foam under complex stresses and the numerical simulation methods used are reasonable.