| 引用本文: | 张杰,邓砚泽,张瀚,赵广慧,向东.Ⅱ型滑移开裂行为下竹胶板单搭接结构力学特性∗[J].中国表面工程,2021,34(1):112~120 |
| Zhang Jie,Deng Yanze,Zhang Han,Zhao Guanghui,Xiang Dong.Mechanical Properties of Bamboo Glued Board with Single Lap Structure under Mode II Slip Cracking Behavior[J].China Surface Engineering,2021,34(1):112~120 |
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| 摘要: |
| 为研究竹胶板的剪切滑移力学行为与失效机理,建立竹胶板单搭接结构Ⅱ型滑移开裂数值模型,考虑非线性接触,利用无厚度 cohesive 黏聚力行为模拟黏接层损伤失效,从极限失效载荷、剥离应力及剪切应力角度分析单搭接结构在位移载荷作用下发生剪切滑移失效的演化规律,探究了竹胶板厚度、黏接长度、位移载荷量对搭接结构失效机制影响规律。 结果表明,竹胶板厚度越小,搭接面沿长度两侧剥离失效越剧烈,一定范围内的竹板厚度增加可提高单搭接结构胶合能力;随着搭接长度增加,极限失效载荷增长率下降,搭接面上出现更多胶层界面黏合破坏区域,混合破坏模式更加明显,而自由边长度对搭接效果无显著影响;搭接面剥离失效占比随位移载荷增加而增加。 研究结果可为竹材的胶合结构设计提供理论依据。 |
| 关键词: 竹胶板 单搭接 剪切滑移 剥离失效 |
| DOI：10.11933/j.issn.1007-9289.20201222003 |
| 分类号:TU398 |
| 基金项目:中国博士后科学基金(2019M653839XB)和四川省博士后特别资助项目 |
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| Mechanical Properties of Bamboo Glued Board with Single Lap Structure under Mode II Slip Cracking Behavior |
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Zhang Jie1, Deng Yanze1, Zhang Han2, Zhao Guanghui1, Xiang Dong3
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1.School of Mechanical Engineering, Southwest Petroleum University, Chengdu 610500 , China;2.Department of Mechanical Engineering, University of Alberta, Edmonton T 6.G 2.G8, Canada;3.School of New Energy and Materials, Southwest Petroleum University, Chengdu 610500 , China
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| Abstract: |
| In order to study the mechanical behavior and failure mechanism of bamboo plywood, a numerical model of mode II slip cracking of bamboo glued board with single lap structure is established. Considering nonlinear contact, cohesive behavior without thick- ness is used to simulate the damage and failure of adhesive layer. The evolution law of shear slip failure of single lap structure under displacement load is analyzed from three aspects of ultimate failure load, peel stress and shear stress. Effects of the thickness of bam- boo glued board, adhesive length and displacement load on the failure process of lap joint model were studied. The results show that the smaller the thickness of the bamboo plate is, the more severe the peeling failure along both sides of the lap surface is. The bonding ca- pacity of the single lap structure can be improved by increasing the thickness of the bamboo plate within a certain range. With the in- creasing of the lap length, the growth rate of the ultimate failure load decreases, there are more adhesive failure areas on the lap sur- face, and the mixed failure mode is more obvious. The free edge length has no significant effect on the lap effect. The failure increases with the increasing of displacement load. The research results can provide theoretical and technical support for the glued structure de- sign of bamboo. |
| Key words: bamboo glued board single lap shear slip peel failure |
