• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2021, Vol. 57 ›› Issue (8): 154-165.doi: 10.3901/JME.2021.08.154

• 材料科学与工程 • 上一篇    下一篇

扫码分享

不同胶接参数对CFRP层合板单搭胶接结构强度的影响及优化设计

胡春幸, 侯玉亮, 铁瑛, 李成, 毛振刚   

  1. 郑州大学机械与动力工程学院 郑州 450001
  • 收稿日期:2020-04-10 修回日期:2020-10-14 出版日期:2021-04-20 发布日期:2021-06-15
  • 通讯作者: 李成(通信作者),男,1962年出生,博士,教授,博士研究生导师。主要研究方向为复合材料力学。E-mail:chengli@zzu.edu.cn
  • 作者简介:胡春幸,男,1993年出生,硕士研究生。主要研究方向为复合材料胶接结构。E-mail:huchunxing2020@163.com;侯玉亮,男,1988年出生,博士,讲师,硕士研究生导师。主要研究方向为复合材料力学与结构优化设计。E-mail:yulianghou@zzu.edu.cn;毛振刚,男,1994年出生,硕士研究生。主要研究方向为复合材料损伤分析。E-mail:1358434420@qq.com;铁瑛,女,1978年出生,博士,副教授,硕士研究生导师。主要研究方向为复合材料机械强度。E-mail:tieying@zzu.edu.cn
  • 基金资助:
    国家自然科学基金(U1833116,52005451)和河南省等学校重点科研(20A460003)资助项目。

Influence of Different Bonding Parameters on the Strength of CFRP Laminates with Single Lap Bonding Structure and Optimization

HU Chunxing, HOU Yuliang, TIE Ying, LI Cheng, MAO Zhengang   

  1. School of Mechanical and Power Engineering, Zhengzhou University, Zhengzhou 450001
  • Received:2020-04-10 Revised:2020-10-14 Online:2021-04-20 Published:2021-06-15

摘要: 对于碳纤维增强基复合材料(Carbon fibre-reinforced polymer, CFRP)层合板单搭胶接结构的优化问题,首先利用连续损伤力学模型、三维Hashin准则和内聚力模型研究不同胶接参数对CFRP层压板单搭胶接结构力学性能的影响,其次采用拉丁超立方试验设计方法和响应面法构建了拉伸强度代理模型,最后基于遗传算法和代理模型进行联合优化。结果表明,仿真与试验吻合较好,数值结果与试验结果的误差均低于10%,验证了有限元模型的精确性。随着搭接长度的增大,拉伸强度和层合板层间分层损伤程度逐渐增大,剪切强度和胶层自身剪切失效程度逐渐减小;胶接结构的力学性能及失效形式随着铺层方式的不同而改变。最佳铺层顺序、胶接长度、胶层厚度和搭接宽度分别为[03/903]2s、20 mm、0.060 7 mm和10 mm。与常规单搭胶接结构相比,拉伸强度和剪切强度分别提高了25.92%和25.88%。采用遗传算法对CFRP层合板单搭胶接结构进行优化,对提高单搭接接头的力学性能具有重要意义。

关键词: 单搭胶接结构, 胶接参数, 连接强度, 代理模型, 优化设计

Abstract: To obtain the optimization of single lap joint(SLJ) of CFRP laminates, the effects of different bonding parameters on the mechanical properties of SLJ are firstly studied by using continuum damage mechanics(CDM) model, 3D Hashin damage criterion and cohesion zone model(CZM). Moreover, a surrogate model of tensile strength is constructed using the Latin hypercube sampling (LHS) method and response surface method(RSM). Finally, the optimized design of CFRP SLJ structure is obtained by combination of the surrogate model and genetic algorithm(GA). The results show that, the error is less than 10% between the numerical and experimental results, which proves the validity of the used numerical model. As the lap length increases, the tensile strength and the delamination damage between adjacent layers of the laminates are gradually increased. Additionally, the shear strength and the shear failure level of the adhesive are gradually reduced. The connection performance and failure form of the adhesively bonded structure change with different stacking sequences. The best stacking sequences, lap lengths, adhesive thickness and lap widths are [03/903]2s, 20 mm, 0.060 7 mm, and 10 mm, respectively. Compared with the conventional SLJ, the tensile and shear strengths are increased by 25.92% and 25.88%, respectively. Genetic algorithm is used to optimize the SLJ of CFRP laminates, which is of great significance to improve the mechanical properties of SLJ.

Key words: single-lap joints, adhesively bonding parameters, connection strength, surrogate model, optimization

中图分类号: