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Clinch-bonded hybrid joining technology has been applied increasingly in different manufacturing disciplines. In this study, specimens of both similar and dissimilar sheets of H62 copper alloy, aluminium alloy and galvanised steel sheets were prepared in single-lap and T-joints. Tensile-shear tests and peeling tests were carried out for studying the load-bearing capacity and energy absorption of different clinch-bonded hybrid joints. The failure fractures were studied by a scanning electron microscope to characterise the different failure modes. Results show that the shear strength of the specimens, which results mainly from the adhesive, is better than their peeling strength, which is closely related to clinched structures. The mixed neck fracture exhibited the highest shear strength, and a better ability to absorb energy could be obtained by decreasing the material strength of the lower sheets in the tensile-shear test. In the peeling test, it was found that the best energy absorption ability could be achieved by the failure mode of upper sheet tearing, and improving the strength of the lower sheets resulted in greater joint peeling strength. [ABSTRACT FROM AUTHOR]

The mechanical properties of extensible die clinched joints in titanium sheet materials were investigated in this paper. Tensile–shear tests were carried out to characterize the mechanical properties of different clinched joints made of the similar titanium sheets and the dissimilar metal sheets combinations. The normal hypothesis tests were performed to examine the rationality of the test data. The load-bearing capacity, energy absorption and failure modes of different titanium sheets clinched joints were studied. Results showed that almost all titanium sheets clinched joints failed in the neck fracture mode. Results also showed that the load-bearing capacity and energy absorption of clinch joints with titanium as upper sheets are higher than that of the clinched joints with titanium as lower sheets. [ABSTRACT FROM AUTHOR]

With an increasing application of clinching in different industrial fields, the demand for a better understanding of the knowledge of static and dynamic characteristics of the clinched joints is required. In this paper, the clinching process and tensile–shear failure of the clinched joints have been numerically simulated using finite element (FE) method. For validating the numerical simulations, experimental tests on specimens made of aluminium alloy have been carried out. The results obtained from tests agreed fairly well with the computational simulation. Tensile–shear tests were carried out to measure the ultimate tensile–shear strengths of the clinching joints and clinching-bonded hybrid joints. Deformation and failure of joints under tensile–shear loading were studied. The normal hypothesis tests were performed to examine the rationality of the test data. This work was also aimed at evaluating experimentally and comparing the strength and energy absorption of the clinched joints and clinching-bonded hybrid joints. [ABSTRACT FROM AUTHOR]