Energy absorption characteristics of lattice truss structureswith graded cross section core member

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Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (14) : 115-121.

^{^{ZHU Lingxue1，ZHU Xiaolei2}}

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Abstract

The finite element method was utilized to analyse the compression properties of lattice truss structureswith graded crosssection core member (LTSGCC). Taking a certain lattice core sandwich as an example, the diameter of its core member is gradientvarying along the thickness. The calculation results were compared with those of the traditional lattice core sandwich (TLS). A prediction model was also used to calculate the first peak value of the LTSGCC, the maximum error is 8.9%, when comparing with the FEM results. The first peak value of the LTSGCC is smaller than that of the TLS. Meanwhile, the specific energy absorption (SEA) of the LTSGCC is larger than that of the TLS, and reaches the maximum, when the gradient coefficient is 0.05.

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lattice truss structures with graded cross-section of core member / lattice truss / energy absorption / compressive loading

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ZHU Lingxue1，ZHU Xiaolei2. Energy absorption characteristics of lattice truss structureswith graded cross section core member[J]. Journal of Vibration and Shock, 2018, 37(14): 115-121

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