文献类型：期刊文献

英文题名：Effect of crack defects on interlaminar shear properties of cross-laminated timber (CLT)

作者：Li, Mingyue[1] Gong, Yingchun[1] Zhong, Yong[1]

第一作者：Li, Mingyue

通信作者：Gong, YC[1]

机构：[1]Chinese Acad Forestry, Res Inst Wood Ind, Beijing 100091, Peoples R China

年份：2024

外文期刊名：WOOD MATERIAL SCIENCE & ENGINEERING

收录：;EI(收录号：20244917488993);Scopus(收录号：2-s2.0-85210919470);WOS:【SCI-EXPANDED(收录号:WOS:001370306400001)】；

基金：We would like to thank the Scientific and Technological Innovation 2030 - Major Project [grant number 2023ZD0405905].

语种：英文

外文关键词：Wood; failure mechanism; inter-layer shear properties; fracture path

摘要：Cross-laminated timber (CLT) has become one of the most popular engineering wood products in construction because of its excellent physical and mechanical properties. In this study, the short-span three-point bending test combined with acoustic emission test was used to study the effect of cracks on the inter-layer shear properties and fracture path of CLT. Crack length and crack location was used as influencing factors. Macro and micro failure patterns are analysed. The results show that the crack length had significant effects on the interlaminar shear strength and the initial failure load. The load-strain curve and acoustic emission location fracture paths were characterised by a rolling-shear failure stage, an instability stage, and a tensile failure stage of the tensile-side outer layer of the CLT. With the increase of crack length, the initial-failure load and inter-layer-shear strength were reduced due to the variations of crack-initiation location and crack-propagation path. The research of this study has certain guiding significance for the safe use of CLT in practical engineering.