不同加载速率对CFRP/Al单双剪铆接强度的影响研究OA
Effect of loading rate on riveting strength of the single/double lap joints of CFRP/Al
铆接结构通常受到不同速率的拉伸载荷,而拉伸速率的大小对复合材料与金属铆接结构的强度有显著影响.为了探究加载速率对碳纤维增强复合材料(Carbon Fiber Reinforced Polymer,CFRP)/铝合金(Aluminum,Al)单双剪铆接强度的影响,利用ABAQUS二次开发VUMAT子程序的功能,基于连续损伤力学、三维Hashin失效准则和应变率效应,建立了CFRP/Al单双剪铆接的数值模型,研究了 1 mm/s、100 mm/s、200 mm/s、300 mm/s四种拉伸速率对单剪和双剪铆接强度的影响,同时进行拉伸试验验证数值模型的准确性.结果表明:随着拉伸速率的增大,单剪和双剪铆接接头的强度均增加,但双剪铆接接头的强度增幅更大.此外,拉伸速度越高,CFRP损伤程度越小,表明高拉伸速度对CFRP损伤具有明显的抑制作用.
Riveted structures are often subjected to tensile loads at different loading rates,and the tensile rate has a significant impact on the strength of carbon fiber reinforced composites(CFRP)-metal riveted structures.To investigate the effect of loading rate on the single and double lap riveted joints strength of CFRP/Al,a numerical model of CFRP/Al single and double lap riveted joints was established using the VUMAT subroutine function in ABAQUS.This model is based on continuum damage mechanics,the 3D Hashin failure criterion,and strain rate effects.The study examined the impact of four tensile rates-1 mm/s,100 mm/s,200 mm/s,and 300 mm/s—on the strength of single and double lap riveted joints,and tensile tests were conducted to validate the accuracy of the numerical model.The results indicate that as the tensile rate increases,the strength of both single and double lap riveted joints also increases,with a more significant increase observed in double lap riveted joints.Additionally,as the tensile rate increases,the degree of damage to CFRP decreases,indicating that higher tensile rates have a no-ticeable suppressive effect on CFRP damage.
覃育参;王兵兵;吴金森;金万军;何超;唐正强
贵州大学 机械工程学院,贵阳 550025贵州大学 机械工程学院,贵阳 550025贵州大学 机械工程学院,贵阳 550025中国航空工业标准件制造有限责任公司,贵阳 550014中国航空工业标准件制造有限责任公司,贵阳 550014贵州大学 机械工程学院,贵阳 550025
通用工业技术
抽芯铆钉复合材料拉伸速率有限元分析
blind rivetcarbon fiber reinforced compositestensile ratefinite element analysis
《复合材料科学与工程》 2026 (2)
65-71,7
贵州省科技计划项目(黔科合支撑[2021]一般281)
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