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Three-point bending deflection and failure mechanism map of sandwich beams with second-order hierarchical corrugated truss core

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成果类型:
期刊论文
作者:
Li, Gang;Fang, Yaochu;Hao, Peng;Li, Zhaokai
通讯作者:
Hao, P.
作者机构:
[Li, Gang; Li, Zhaokai; Hao, Peng] Department of Engineering Mechanics, State Key Laboratory of Structural Analysis of Industrial Equipment, Dalian University of Technology, Dalian, China
[Fang, Yaochu] School of Urban Construction, University of South China, Hengyang, 421001, China
通讯机构:
[Hao, Peng] Dalian Univ Technol, State Key Lab Struct Anal Ind Equipment, Dept Engn Mech, Dalian, Peoples R China.
Department of Engineering Mechanics, State Key Laboratory of Structural Analysis of Industrial Equipment, Dalian University of Technology, Dalian, China
语种:
英文
关键词:
Correction factor;Failure mechanism map;Hierarchical corrugated truss core;Sandwich beam;Three-point bending
期刊:
Journal of Sandwich Structures and Materials
ISSN:
1099-6362
年:
2017
卷:
19
期:
1
页码:
83-107
基金类别:
National Basic Research Program of China [2014CB046506, 2014CB046803]; National Natural Science Foundation of China [11372061, 11402049, 91315301]; China Postdoctoral Science Foundation [2014M551070]; Fundamental Research Funds for the Central Universities [DUT14RC(3)028]
机构署名:
本校为其他机构
院系归属:
土木工程学院
摘要:
For sandwich beams with second-order hierarchical corrugated truss core under three-point bending, a correction factor of shear deflection was firstly proposed to improve the prediction accuracy of the bending analysis, which was verified by finite element analysis and compared with the original formula. Then, the failure modes of the sandwich beam under bending were analyzed, including four competing modes of the large struts (i.e. plastic yielding, buckling, wrinkling of facesheet, shear buckling) and two competing modes of the small struts (i.e. plastic yielding, buckling). Subsequently, the analytical expressions of critical load for each failure mode were derived. On this basis, the failure mechanism maps were constructed. Finally, several typical points from the map were selected and verified by finite element analysis, and a good agreement of predicted failure modes was observed.

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