BFRP/AA5052胶粘接头力学性能及工艺参数影响研究  

Research on the Mechanical Properties and Process Parameter Influence of BFRP/AA5052 Adhesive Joints

作　　者：王大勇[1] 崔俊佳[1,2] 王绍螺 王书豪 蒋浩 李光耀[1,2] Wang Dayong;Cui Junjia;Wang Shaoluo;Wang Shuhao;Jiang Hao;Li Guangyao(Hunan University,State Key Laboratory of Advanced Design and Manufacturing Technology for Vehicle,Changsha 410082;Shenzhen Automotive Research Institute,Beijing Institute of Technology,Shenzhen 518118)

机构地区：[1]湖南大学,整车先进设计制造技术全国重点实验室,长沙410082 [2]北京理工大学深圳汽车研究院,深圳518118

出　　处：《汽车工程》2025年第2期356-366,375,共12页Automotive Engineering

基　　金：国家自然科学基金(52175315);深圳市科技计划项目(KQTD20200820113110016)资助。

摘　　要：本文研究了胶粘剂、基材和尺寸等重要参数对玄武岩纤维增强塑料(BFRP)-铝合金(AA5052)和BFRP-BFRP单搭接胶粘接头力学性能的影响。基于响应面分析法(RSM)建立了工艺参数(AA5052基板厚度、搭接区长度、加载方向与玄武岩纤维主方向的夹角)对接头机械性能影响的预测模型。结果表明胶粘接头的强度和刚度受到被粘基材的屈服强度和刚度影响,BFRP-BFRP胶粘接头具有更高的峰值载荷,而BFRP-AA5052胶粘接头的整体刚度更大。使用脆性结构胶可以显著提升胶粘接头的强度和断裂吸收能,最高分别达到了57.4%与1 128.5%。引入了剪切强度Y作为评估胶粘剂强度利用率的评价指标,基于RSM建立了Y的强度预测模型,得到了具有良好显著性的回归方程,并对最佳工艺参数的区间进行了预测。根据强度预测模型分析了工艺参数的耦合作用,发现纤维方向与接头强度呈负相关,而搭接区长度和铝合金基板厚度与接头强度呈正相关。综合考虑接头强度、胶粘剂使用成本和轻量化效果,应使加载方向和纤维主方向一致,并控制搭接区长度在20-25 mm区间内,AA5052基板的厚度在2-2.5 mm区间内。本文为BFRP-AA5052胶粘结构在载运装备中的应用提供了理论和数据支持。In this article,the effect of adhesive type,substrate properties,and structural dimensions on the mechanical properties of basalt fiber reinforced polymer(BFRP)-aluminum alloy(AA5052)and BFRP-BFRP single lap adhesive joints is investigated.Using the response surface methodology(RSM),a predictive model is es-tablished to evaluate the impact of three process parameters(aluminum substrate thickness,overlap length,and the angle between the loading direction and the primary direction of the basalt fibers)on the mechanical performance of the joints.The results indicate that the strength and stiffness of the adhesive joints are influenced by the yield strength and stiffness of the bonded substrates.BFRP-BFRP adhesive joints exhibit higher peak load,whereas BFRP-AA5052 adhesive joints demonstrate greater overall stiffness.The use of brittle structural adhesives can sig-nificantly enhance the strength and fracture energy absorption of the adhesive joints,reaching up to 57.4%and 1128.5%,respectively.The shear strength Y is introduced as an evaluation metric for assessing the adhesive strength utilization rate.A strength prediction model for Y is established based on RSM,resulting in a regression equation with good significance,and the optimal range for the process parameters is predicted.The analysis of the coupling effect of the process parameters based on the strength prediction model reveals a negative correlation be-tween fiber direction and joint strength,while overlap length and aluminum substrate thickness show a positive cor-relation with joint strength.Considering the joint strength,adhesive cost,and lightweight effect,it is recommended that the loading direction aligns with the primary direction of the fibers,with the overlap length controlled within the range of 20 mm to 25 mm,and the aluminum substrate thickness within the range of 2 mm to 2.5 mm.This study provides theoretical and data support for the application of BFRP-AA5052 adhesive structures in transportation equipment.

关 键 词：玄武岩纤维 铝合金 胶粘接头 工艺参数 力学性能 预测模型 

分 类 号：TQ430.7[化学工程] U466[机械工程—车辆工程]