Lupășteanu Vlad, Ungureanu Dragoș, Țăranu Nicolae, Isopescu Dorina Nicolina, Lupășteanu Radu, Mihai Petru
Faculty of Civil Engineering and Building Services, "Gheorghe Asachi" Technical University of Iaşi, 43 Mangeron Blvd., 700050 Iaşi, Romania.
The Academy of Romanian Scientists, 54 Splaiul Independentei, Sector 5, 050094 Bucuresti, Romania.
Materials (Basel). 2021 Nov 8;14(21):6722. doi: 10.3390/ma14216722.
This paper presents the outcomes of an experimental and numerical study performed on epoxy-bonded single lap joints (SLJs) between carbon fiber-reinforced polymer (CFRP) composite strips and steel elements. For the experimental program, 34 specimens were prepared by varying the type of the composite strip and the type of adhesives and their thicknesses; all specimens were loaded in axial tension up to failure. The specific failure mechanisms were identified and commented on the basis of the performed tests, and the load-displacement curves were plotted. Additionally, the strain distributions along the bond lengths at different load stages, the shear stress-displacements (slip) variations and the stress-strain distributions for the CFRP strips were plotted and investigated. The numerical simulations, based on 3D finite element method (FEM) analysis, provided consistent results, in good agreement with the experimental ones for all parameters that were investigated and discussed in this paper.
本文介绍了对碳纤维增强聚合物（CFRP）复合材料条带与钢构件之间的环氧粘结单搭接接头（SLJ）进行的实验和数值研究结果。对于实验方案，通过改变复合材料条带的类型、胶粘剂的类型及其厚度制备了34个试件；所有试件均承受轴向拉伸直至破坏。根据所进行的试验确定并评论了具体的破坏机制，并绘制了载荷-位移曲线。此外，还绘制并研究了不同载荷阶段沿粘结长度的应变分布、剪应力-位移（滑移）变化以及CFRP条带的应力-应变分布。基于三维有限元法（FEM）分析的数值模拟给出了一致的结果，与本文研究和讨论的所有参数的实验结果吻合良好。
