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Finite Element Modeling of Multilayer Orthogonal Auxetic Composites under Low-Velocity Impact

机译:低速冲击下多层正交辅助复合材料的有限元建模

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摘要

The multilayer orthogonal auxetic composites have been previously developed and tested to prove that they own excellent energy absorption and impact protection characteristics in a specific strain range under low-velocity impact. In this study, a three dimensional finite element (FE) model in ANSYS LS-DYNA was established to simulate the mechanical behavior of auxetic composites under low-velocity drop-weight impact. The simulation results including the Poisson’s ratio versus compressive strain curves and the contact stress versus compressive strain curves were compared with those in the experiments. The clear deformation pictures of the FE models have provided a simple and effective way for investigating the damage mechanism and optimizing the material, as well as structure design.
机译:多层正交膨胀复合材料已经过开发和测试,以证明它们在低速冲击下的特定应变范围内具有出色的能量吸收和冲击保护特性。在这项研究中,在ANSYS LS-DYNA中建立了三维有限元(FE)模型,以模拟低速落锤冲击下膨胀复合材料的力学行为。将仿真结果(包括泊松比与压缩应变曲线以及接触应力与压缩应变曲线)与实验中的结果进行了比较。有限元模型清晰的变形图为研究损伤机理,优化材料以及结构设计提供了简单有效的方法。

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