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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。
Laminated connecting materials have uncertainties in interlayer forces due to the material differences of their different layers. In this paper, based on the characteristics of laminated connection material, a simplified single layer equivalent mechanical model of laminated connection material is established based on the theory of small deformation elasticity based on the damage damage model of composite material. In order to verify the correctness of the equivalent mechanical model, the calculation results are compared with those of the Hopkinson pressure bar test. On the basis of this, the experimental data are used to determine the required material parameters for the equivalent mechanical model. ANSYS / LS-DYNA finite element Computational software numerical simulation of cylindrical shell under impact load dynamic response. The results show that the equivalent mechanical model of laminated connection material can reduce the calculation time and ensure the necessary calculation accuracy, and accurately describe the mechanical properties of laminated connection material under the impact load.