Study on Mechanical Behavior of Lattice Reinforced Foam Sandwich Composite under Hydrostatic Pressure
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摘要: 点阵增强泡沫夹芯复合材料在保留传统夹芯结构高比刚度、比强度的基础上,极大地提高了其Z方向的力学性能,同时具有很好的结构功能可设计性,可以满足一些特殊极端工况的需要。通过对点阵增强泡沫夹芯复合材料静水压下的力学行为进行试验探究,得到不同水压下Z方向形变和面内应力的大小。基于ABAQUS有限元软件建立了点阵增强泡沫夹芯复合材料仿真模型,从有限元角度对其静水压作用下的力学行为进行了模拟与分析,并对点阵受力情况进行预测。模拟结果与试验相近,验证了有限元模型的合理性、可靠性,为该种材料的工程仿真设计奠定了一定基础。Abstract: The Z-direction lattice reinforced foam sandwich composite material retains the high specific stiffness and strength of the traditional sandwich structure, and greatly improves its Z-direction mechanical properties. At the same time, it has good structural and functional designability to meet the needs of some special extreme conditions. In this paper, the underwater performance of the Z-direction reinforced foam sandwich composite under hydrostatic pressure is experimentally investigated, and the Z-direction deformation and in-plane stress under different pressures are obtained. And based on ABAQUS finite element software, the test simulation model of a Z-direction lattice reinforced foam sandwich composite material under hydrostatic pressure is established, its mechanical behavior is simulated and analyzed from the perspective of finite element, and the force situation of the lattice predicted. The simulation results are similar to that of the experiment, verifying the rationality and reliability of the finite element model, and laying the foundation for the engineering simulation design of materials of this kind.
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