Anti-impact Analysis of Sacrificial Claddings of Cellular Material with Temperature Gradient

doi:10.3969/j.issn.1000-1093.2017.12.021

Abstract

Abstract: Considering the applications of cellular materials as the sacrificial claddings in protecting the major structure from impact/blast load, a design method of cellular foam claddings with temperature gradient under high initial velocity impacts is presented. An one-dimensional model for the compaction of cellular foam claddings with temperature gradient is developed for the striker-rod impact scenario based on the rigid-perfectly plastic-locking (R-P-P-L) model. The predictions of the proposed model are compared to FE simulations by using the realistic R-PLH material model based on the actual experimentally derived stress-strain curves. The predictions of the dependence of critical length, critical impact velocity and impact force of the cellular foam rod with temperature gradient on the temperature distribution and the relation between critical impact velocity of an aluminum foam rod with a given length and the temperature contrast at its two ends are compared well with the numerical simulations results. Key

Key words: solidmechanics, cellularmaterialsacrificialcladding, temperaturegradient, crashworthiness, shockwavepropagation, optimizationdesign

CLC Number:

O347.3

LI Zhi-bin， LU Fang-yun. Anti-impact Analysis of Sacrificial Claddings of Cellular Material with Temperature Gradient[J]. Acta Armamentarii, 2017, 38(12): 2463-2471.

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第38卷第12期
2017 年12月兵工学报ACTA
ARMAMENTARIIVol.38No.12Dec.2017

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