| 金属-复合材料胶接凹槽形貌增强及参数设计 |
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| 引用本文： | 康振航,雷永鹏,石忠华,宋权威,章继峰.金属-复合材料胶接凹槽形貌增强及参数设计[J].复合材料学报,2023,40(1):530-541. |
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| 作者姓名： | 康振航 雷永鹏 石忠华 宋权威 章继峰 |
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| 作者单位： | 哈尔滨工程大学 航天与建筑工程学院，哈尔滨 150001 |
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| 基金项目： | 国家自然科学基金 (11772098；51672054) |
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| 摘 要： | 金属-复合材料混合接头广泛存在于航空、船舶及汽车等领域，具有凹槽形貌的共固化金属-复合材料接头可保持复合材料结构的完整性和纤维的连续性。在被连接金属表面设计了±45°凹槽，评估了表面形貌对钢-玻璃纤维增强树脂复合材料(GFRP)接头胶接性能的影响，设计了单搭接拉伸剪切试验，验证胶接接头的剪切性能；在模拟中引入随机Weibull分布，定义内聚单元材料参数，结合矢量化用户材料(Vectorized user material，VUMAT)子程序模拟了接头的渐进失效过程，并建立±45°凹槽结构的代表性体积单元(Representative volume element，RVE)模型，分析了凹槽宽度和深度等参数对胶接接头的性能影响。研究表明，±45°凹槽结构可以显著提高钢-GFRP胶接接头的剪切强度，数值模拟强度和破坏模式与试验吻合；凹槽深度和宽度对结构胶接性能的影响显著，本文可为金属-复合材料接头的设计提供参考。
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| 关 键 词： | 胶接 沟槽结构 内聚单元 随机分布 代表性体积单元(RVE) |
| 收稿时间： | 2021-11-15 |
Groove morphology enhancement and parameter design of metal-composite bonding |
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| Affiliation: | School of Aerospace and Building Engineering, Harbin Engineering University, Harbin 150001, China |
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| Abstract: | Metal-composite hybrid joints are widely used in aviation, ship, and automobile. Co-cured metal-composite joints with groove morphology can maintain the integrity of the composite structure and the continuity of fibers. ±45° grooves were designed on the connected metal surface, and the influence of surface morphology on the bonding performance of steel-glass fiber reinforced polymer (GFRP) joints was evaluated. The single-lap joint tensile shear test was designed to verify the shear performance of the bonded joints. In the simulation, the random Weibull distribution was introduced to define the material parameters of the cohesive element, and the progressive failure process of the joint was simulated combined with the vectorized user material (VUMAT) subroutine. The representative volume element (RVE) model of ±45° groove structure was established to analyze the influence of groove width and depth on the adhesive joint. The research shows that the ±45° groove structure can significantly improve the shear strength of steel-GFRP adhesive joints, and the numerical simulation strength and failure mode are consistent with the experiment. The influence of groove depth and width on structural bonding performance is obvious. The research in this paper can provide a reference for the design of metal-composite joints. |
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