| 复合粘结节点强度-断裂预测模型 |
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| 作者姓名： | Goyal V.K. Johnson E.R. |
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| 摘 要： | 减聚力单元在有限元模型中被用以预测粘结节点的破坏,为明确表达减聚力单元,提出了一个新的强度-断裂模型。所提出的模型统一了预测初始破坏的强度标准以及预测破坏进程的断裂标准。通过在黏合剂-黏合剂界面以及粘结元素之间配置减聚力单元,模拟初始和界面破坏过程以及内聚裂缝。有限元表达中包含了黏合剂的几何非线性。通过节点配置的静态平衡预测同期裂缝和路径,结点包括双臂梁、单搭接接头、裂缝剪切搭接等。对这些节点的准静态有限元分析预测和试验结果的定性和定量分析显示,两者比较吻合。
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| 关 键 词： | 粘结节点 裂缝路径选择 减聚力单元 |
Predictive Strength-Fracture Model for Composite Bonded Joints |
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| Goyal,V.K.,Johnson,E.R..Predictive Strength-Fracture Model for Composite Bonded Joints[J].Steel Construction,2008,23(7). |
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| Authors: | Goyal VK Johnson ER Goyal |
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| Abstract: | A new strength-fracture model is proposed for the formulation of decohesion elements, which are implemented in finite element models to predict failure of bonded joints. The proposed model unifies criteria for strength to predict failure initiation and criteria for fracture to predict failure progression. The initiation and progression of interfacial cracks and/or cohesive cracks are simulated by positioning decohesion elements at the adherend-adhesive interface and between bulk adhesive elements. Geometric... |
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| Keywords: | Adhesively bonded joints Crack path selection Decohesion elements |
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