Abstract
In this experimental research, a set of tests was conducted on single-lap bolted joints in terms of choosing between two types of bolts and exploiting the optimal solution for connecting samples. Then the effect of the tightening torque on the mechanical behavior of single-lap joints was evaluated. Six simple tensile tests were performed with different values of torque and the results are reported.
Highlights
The construction of a structure generally involves the assembly of parts
The types of specimens were tested as a single lap joint (Figure 5)
At the end of the work carried out within the framework of this article, which deals with the study of the rupture and damage of a bolted assembly made of thin sheets of thickness e=2mm in galvanized steel, we conclude to the following:
Summary
The construction of a structure generally involves the assembly of parts. Different assembly technologies can be used: bolting, riveting, gluing, welding, or their combinations. The presence of the bore hole is the weak point of this type of structure due to the concentration of stresses which is often the main cause of crack initiation The dimensioning of this type of assembly must be based on numerical behavior models that allow choosing and optimizing the design parameters (dimensions), bolt and sheet (plate) properties, tightening torque, number of bolts, spacing between bolts, etc. Authors in [4] have experimentally studied the mechanical strength of a bolted composite plate connection subjected to tensile-shear stress by analyzing the effects of the diameter of the washers and the value of the tightening torque. In the work presented in this paper, we have studied the influence of the tightening torque and the bolt material (hardened and galvanized steel) on the strength of single-lap bolted connections through experimental tests. It is very difficult to model the complicated failure mechanism by analytical methods [10]
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