纤维金属层合板中不同双搭扣胶接接头构型在静载和疲劳载荷作用下行为影响的实验与数值研究

Experimental and Numerical Investigation of Effect of Static and Fatigue Loading on Behavior of Different Double Strap Adhesive Joint Configurations in Fiber Metal Laminates.

作者信息

Azeem Muhammad, Irfan Muhammad, Masud Manzar, Rehman Gulfam Ul, Ali Haider, Ali Muhammad Umair, Zafar Amad, Muhammad Niazi Usama, Rahman Saifur, Legutko Stanislaw, Petrů Jana, Kratochvíl Jiří

机构信息

Department of Mechanical Engineering, University of Wah, Quaid Avenue, Wah Cantt 47040, Pakistan.

Electrical Engineering Department, College of Engineering, Najran University Saudi Arabia, Najran 61441, Saudi Arabia.

出版信息

Materials (Basel). 2022 Mar 1;15(5):1840. doi: 10.3390/ma15051840.

DOI:10.3390/ma15051840

PMID:35269071

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8911663/

Abstract

Double strap lap adhesive joints between metal (AA 6061-T6) and composite (carbon/epoxy) laminates were fabricated and characterized based on strength. Hand layup methods were used to fabricate double strap match lap joints and double strap mismatch lap joints. These joints were compared for their strength under static and fatigue loadings. Fracture toughness (GIIC) was measured experimentally using tensile testing and validated with numerical simulations using the cohesive zone model (CZM) in ABAQUS/Standard. Fatigue life under tension-tension fluctuating sinusoidal loading was determined experimentally. Failure loads for both joints were in close relation, whereas the fatigue life of the double strap mismatch lap joint was longer than that of the double strap match lap joint. A cohesive dominating failure pattern was identified in tensile testing. During fatigue testing, it was observed that inhomogeneity (air bubble) in adhesive plays a negative role while the long time duration between two consecutive cycle spans has a positive effect on the life of joints.

摘要

制作了金属（AA 6061-T6）与复合材料（碳/环氧树脂）层压板之间的双搭接胶粘接头，并基于强度对其进行了表征。采用手工铺层方法制作了双搭接匹配接头和双搭接不匹配接头。对这些接头在静态和疲劳载荷下的强度进行了比较。通过拉伸试验对断裂韧性（GIIC）进行了实验测量，并使用ABAQUS/Standard中的内聚区模型（CZM）通过数值模拟进行了验证。通过实验确定了拉伸-拉伸波动正弦载荷下的疲劳寿命。两种接头的破坏载荷密切相关，而双搭接不匹配接头的疲劳寿命比双搭接匹配接头的疲劳寿命长。在拉伸试验中识别出了内聚主导的破坏模式。在疲劳试验中，观察到胶粘剂中的不均匀性（气泡）起负面作用，而连续两个循环跨度之间的长时间间隔对接头寿命有积极影响。