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论文类型：期刊论文

发表时间：2015-03-01

发表刊物：THIN-WALLED STRUCTURES

收录刊物：SCIE、EI

卷号：88

页面范围：70-81

ISSN号：0263-8231

关键字：Thin-walled structure; Non-convex thin-walled column; Energy absorption; Bionic inspired design

摘要：Collapse analysis of the non-convex multi-corner thin-walled columns under axial loads illustrates that the non-compact expansion-contraction deformation mode of collapse may occur in some cases, which reduces greatly the energy absorption property of these structures. Inspired from the way by which the bamboo nodes and nodal diaphragms enhance the transverse strength of bamboo, the non-convex multi-corner thin-walled column is modified by adding bulkheads in the column for improving the energy absorption property, and a new excellent energy absorption structure named as the bionic non-convex multi-corner column (BI-NCMC) is proposed in this article, which is a non-convex multi-corner thin-walled column with bulkheads. The energy absorption of BI-NCMC has been investigated numerically. A progressive deformation mode has been achieved and this structure shows a higher energy absorption than a similar column without the bulkheads. The role of the bulkheads is to change the deformation mode from an expansion-contraction mode to a progressive mode, while the bulkheads themselves absorb little energy. The influences of parameters in the energy absorption of BI-NCMC are analyzed. It was found that the column with highest energy absorption efficiency is the one with the smallest number of bulkheads while still maintaining the progressive deformation mode. (C) 2014 Elsevier Ltd. All rights reserved.