An efficient physically-based damage model for interface damage of composites sleeved interference joint and influence analysis of its interface friction

An efficient physically-based damage model for interface damage of composites sleeved interference joint and influence analysis of its interface friction
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DOI：
10.1016/j.compstruct.2021.114425
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发表时间：
2021-07
期刊：
Composite Structures
影响因子：
6.3
通讯作者：
Guanhua Xu;Kaifu Zhang;Hui Cheng;B. Luo;P. Zou;B. Liang
Guanhua Xu;Kaifu Zhang;Hui Cheng;B. Luo;P. Zou;B. Liang
中科院分区：
工程技术1区
文献类型：
--
作者：
Guanhua Xu;Kaifu Zhang;Hui Cheng;B. Luo;P. Zou;B. Liang

文献摘要

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安装过程中产生的界面损伤加速了复合材料接头在服役过程中的损伤萌生和演化。准确预测复合材料接头在安装过程中的界面损伤对接头的可靠使用至关重要。建立了一个基于物理的三维各向异性渐进模型，用于预测复合材料套筒过盈连接在安装过程中的界面损伤。该模型采用了基于物理的破坏准则，考虑了原位强度效应和纤维扭结来表征损伤起始。为提高计算效率，采用了一种快速搜索临界破裂面上最大破裂角的算法。进行了安装过程模拟，并通过实验进行了验证。分析了界面摩擦系数对压入载荷和界面损伤的影响。结果表明，安装过程中的压入载荷主要取决于螺栓-套筒界面的摩擦力。为了减轻界面破坏，除了保持螺栓-套筒界面摩擦系数较小外，选择合适的套筒-CFRP界面摩擦系数也很重要。
Interface damage caused by the installation process accelerates damage initiation and evolution of composites joint during service. Accurate prediction of interface damage in the installation is crucial for the reliable application of composites joint. A physically-based 3D anisotropic progressive model was developed for predicting the interface damage of composites sleeved interference joint in the installation. The model employed the physically-based failure criteria considering in-situ strength effects and fiber kinking to characterize damage initiation. A cost-effective algorithm that quickly searches for the maximum fracture angle on the critical fracture plane was adopted to improve the calculation efficiency. Installation process simulations were conducted and validated with experiments. The influence of interface friction coefficient on the press-in load and interface damage were analyzed. Results show that the press-in load in the installation process is primarily dependent on the interface friction of bolt-sleeve interface. To alleviate the interface damage, aside from keeping the friction coefficient of bolt-sleeve interface with small value, choosing an appropriate friction coefficient of sleeve-CFRP interface is also very important.