首页> 外文期刊>Journal of testing and evaluation >In-Plane Testing Behavior of Adhesive-Bonded Steel Sheets: Influence of Sheet Surface Roughness, Adhesive Thickness, and Bonding Width
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In-Plane Testing Behavior of Adhesive-Bonded Steel Sheets: Influence of Sheet Surface Roughness, Adhesive Thickness, and Bonding Width

机译:粘合钢板的平面内测试行为:钢板表面粗糙度,粘合剂厚度和粘合宽度的影响

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摘要

There are various parameters such as bonding width, bond and adhesive thickness, blank surface roughness, adherend thickness, bond length, the geometry of the joint, surface treatment, curing and working temperature, bonding pressure, curing conditions, type of loading, etc. that affect the forming of adhesive bonded blanks in a synergistic manner. The main aim of the present work is to investigate the influence of bonding width, adhesive thickness, and blank surface roughness on the tensile behavior of adhesive bonded blanks. Interstitial free steel grade sheet is used as a base material and the two part epoxy adhesive is used for bonding the base materials. It is found that the engineering stress attained in forming the bonded blank for the same amount of strain is greater if the surface roughness is greater. The extension of the bonded blank at the break point is less for higher surface roughness base materials. With an increase in the adhesive thickness, the engineering stress decreased for a particular strain and there was no effect due to adhesive thickness on the elongation at the break point of the bonded blank. The engineering stress required decreases with the bonding width and the extension at the breaking point of the bonded blank is greater in the case of the bonded blank with a higher bonding width. A sudden fall in engineering stress has occurred in the case of adhesive bonded blanks with higher (2.4 mm) and medium adhesive thickness (1.3 mm), base material surface roughness, and bonding width, while this is not observed in 0.5 mm bonding thickness. The different stages of the forming of adhesive bonded blanks are proposed. Initially, adhesive failure occurs and then base material failure occurs depending on its ductility. Both cohesive failure and interface (adhesive) failure is seen during the forming of adhesive bonded blanks in this work.
机译:有各种参数,例如粘合宽度,粘合和粘合剂厚度,毛坯表面粗糙度,被粘物厚度,粘合长度,接头的几何形状,表面处理,固化和工作温度,粘合压力,固化条件,负载类型等。以协同方式影响粘合毛坯的形成。本工作的主要目的是研究粘合宽度,粘合剂厚度和毛坯表面粗糙度对粘合毛坯拉伸性能的影响。无间隙钢级薄板用作基材,两部分环氧胶粘剂用于粘结基材。已经发现,如果表面粗糙度较大,则在相同的应变量下形成粘合坯料时获得的工程应力也较大。对于表面粗糙度较高的基材,粘合毛坯在断裂点处的延伸较小。随着胶粘剂厚度的增加,对于特定的应变,工程应力减小,并且由于胶粘剂厚度对粘合的坯料的断裂点的伸长率没有影响。在具有更大的粘结宽度的粘结坯料的情况下,所需的工程应力随着粘结宽度的减小而减小,并且在粘结坯料的断裂点处的延伸更大。在具有较高的粘合厚度(2.4毫米)和中等的粘合厚度(1.3毫米),基材表面粗糙度和粘合宽度的粘合粘合坯料中,工程应力突然下降,而在粘合厚度为0.5毫米时未观察到。提出了粘合毛坯形成的不同阶段。最初,发生粘合故障,然后根据其延展性发生基材故障。在这项工作中,在粘合粘合的毛坯成型过程中,会同时观察到内聚破坏和界面(粘合)破坏。

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