纤维金属层合材料防阻块的冲击响应和吸能特性研究

本项目进行纤维金属层合材料防护基本结构防阻块冲击响应的基础性与检验性实验研究，揭示此种防护基本结构冲击响应的基本特性与规律，并为工程性总体的有限元数值模拟，以及探索性局部的回传射线矩阵方法研究提供实验检验例证。提出纤维金属层合材料冲击响应的回传射线矩阵理论分析模型，计及材料应变率效应，并考虑层合材料中的一阶剪切变形效应。建立纤维金属层合材料防阻块冲击响应的回传射线矩阵研究方法，分析应力波在层合材料中的传播与在其结构中传播的耦合效应的发生机理，分析层合材料防护基本结构的吸能特性。以实验结果检验回传射线矩阵法分析此类结构冲击响应问题的有效性、可靠性。研究结果将给出层合材料防阻块冲击响应的回传射线矩阵法理论分析模型，为纤维金属层合材料防护基本结构提升吸能能力的优化设计给予理论指导。

In this project, experimental investigation of impact responses of thin-walled multicorner column structures made of fiber-metal laminates(FMLs) is to be performed to reveal the basic properties and laws about impact responses of the thin-walled multicorner column structures,and to provide experimental verification for probing the possibilities for developing the method of reverberation-ray matrix(MRRM)to study impact responses and simulating by the finite element method(FEM)in engineering. The mathematical model of impact responses of FMLs will be proposed with considering strain rate effect of materials and the first-order shear deformation by the method of reverberation-ray matrix. The mechanism of coupling effect of wave propagation in FMLs, its energy absorbing structures and energy absorption characteristics of the thin-walled multicorner column structures of FMLs will be analyzed. The algorithmic reliability of solutions used to analyze the impact response of the thin-walled multicorner column structures of FMLs by MRRM will be confirmed through low-velocity impact testing. In addition, we shall establish the algorithm of MRRM and introduce a new method of the impact responses of thin-walled multicorner column structures of FMLs by MRRM, which provides the theoretical references on improving performance of FMLs and optimization design of enhancing the impact resistant ability of the thin-walled multicorner column structures.