冲击载荷下叠层连接材料的建模与计算

Modeling of the tubular shell of laminated connector materials during impact loading

叠层连接材料由于其不同层的材料差异使得层间作用力具有不确定性。该文针对叠层连接材料的特点,在复合材料损伤破坏模型基础上,根据小变形弹性理论建立了叠层连接材料的简化单层等效力学模型。为了验证等效力学模型的正确性,将计算结果同Hopkinson压杆实验的结果进行对比,并在此基础上利用实验数据确定等效力学模型计算所需材料参数,采用ANSYS/LS-DYNA有限元计算软件数值模拟计算了筒状壳体在冲击载荷下的动力学响应。研究结果表明:叠层连接材料等效力学模型可以减少计算时间,并保证必要的计算精度,准确地描述叠层连接材料在冲击载荷作用下的力学性能。

Each layer of laminated connector material has different material properties, so the reaction forces between them are uncertain. This paper presents a simplified equivalent single composite material model for simulating the laminated connector materials. Finite element simulation results are then compared with experimental data. Small differences between the numerical results and Hopkinson-bar experimental results verify the accuracy of this finite element model. Numerical simulations of a cylindrical shell structure under impulsive loadings are then conducted using the finite element analysis software ANSYS/LS-DYNA. The results show that the equivalent single composite material model is valid and accurate.