Experimental and numerical analysis of epoxy based adhesive failure on mono ... скачать в хорошем качестве

Experimental and numerical analysis of epoxy based adhesive failure on mono ...

https://www.fracturae.com/index.php/f... Development in material science imposes to use different materials in production. This causes a problem for joining different materials because traditional joining techniques such as welding could not overcome this problem in industries such as automotive. Hence, adhesive bonding overcomes this problem by its superiorities to join different materials. The joint strength of epoxy-based adhesives is affected by adhesive thickness, adherent’s surface quality, and curing conditions. In this study, two different materials were bonded by epoxy adhesive as single lap jointof Aluminum-Aluminum, Steel-Steel, and Aluminum-Steel. The effects of adhesive thickness and surface roughnessto strength were compared. SLJs were tested for 1, 10, 25 and 50 mm/min displacement rates. Adhesive surface structures were imaged by Scanning Electron Microscopy to investigate adhesive fractures. Surface roughnesses were examined by using Atomic Force Microscopy to compare its influence on failure load. Finite Element Analysis was conducted by using Cohesive Zone Model with ANSYS 18.0 software to obtain stress distribution of adhesive. Optimum values according to the present conditions of the thickness and roughness were determined. Experimental results were demonstrated that while displacement rates rose, failure loads increased as well. FEA analysis was fit to experimental results. It has been observed that along with material type, peel stresses become an important factor for joint strength.