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Date of Publication:2015-01-01

Journal:爆炸与冲击

Affiliation of Author(s):运载工程与力学学部

Issue:4

Page Number:473-481

ISSN No.:1001-1455

Abstract:A new type of creased square tube specifically designed with some folded lobes added at the wall of ordinary square tube is studied inorder not only to reduce the initial loading, but also to enhance the effective plastic area distortion which leads to a higher energy absorption efficiency. The numerical results based on the FEM package ABAQUS/EXPLICIT verify that the pre-folds could lead the pre-folded origami to the expected large deformation mode under low speed impact, which effectively reduce the peak load and also improve the average load of load-displacement curve compared with ordinary square tubes. The load-displacement curve obtained by FEM is identical to the results of low droped hammer test, which verifies the credibility of the numerical results as well as the high energy absorption characteristics of the tube. ©, 2015, Explosion and Shock Waves. All right reserved.

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