Mechanical Properties and Fracture Analysis of Clinched Joints in Titanium Sheet Materials

Abstract

Mechanical fastening techniques are used extensively in different industry fields for joining various materials in the assembly of components and structures. The use of mechanical clinching is of interest to different industries such as aerospace, automotive, packaging and domestic appliance. This, together with increasing use of light-weight materials, has produced a significant increase in the use of mechanical clinching in light-weight structures in recent years. This paper deals with the mechanical properties and fracture analysis of extensible die clinched joints in the dissimilar metal sheets combinations of titanium sheet material and aluminum sheet material. Tensile-shear tests were carried out to characterize the mechanical properties of different clinched joints made of the dissimilar metal sheets combinations. The normal hypothesis tests were performed to examine the rationality of the test data. The load-bearing capacity and failure modes of different titanium sheets clinched joints were studied. Results showed that most titanium sheets clinched joints failed in the neck fracture mode. Results also showed that the load-bearing capacity of clinch joints with titanium as upper sheets is higher than that of the clinched joints with titanium as lower sheets.

Clinching of High-Strength Steel Sheets with Local Preheating

“…Over the past three decades, clinching has emerged as a fast-growing mechanical joining method in the automotive and aerospace sectors. Clinching joining technology has emerged as a promising solution for lightweight constructions that require high production rates, especially when joining hybrid metal-composite parts [22,23]. Clinching is a fast and localized mechanical fastening technique that involves deforming two or more sheet components through plastic deformation.…”

The Clinching Joints Strength Performance of EN 10346: 2015 DX52D + Z Sheets

“…In the study of Varis (2004), the applications that began with the clinching technique of steel sheets with different strength values, which are still widely used in the automotive industry, were later applied by as with the studies continued with the joining of aluminum alloys to each other. Titanium, an indispensable material in the automotive industry as well as in the aircraft and space industries, was studied for clinching experiment by , He et al (2015), apart from He et al (2017), Neugebauer et al (2008) carried out studies on magnesium, and finally Baoying et al (2015) measured clinching performances of copper sheets. In some studies on the performance of these types of joints, the joining performances of two different metals were examined such as Abe et al (2012), Jiang et al (2015) and Mucha et al (2013) on steel and aluminium joints, Lambiase et al (2018) on titanium and aluminium joints, Li et al (2013) on magnesium and aluminum joints, Wang et al (2018) studied the clinching performance of different materials such as copper foil and perforated steel sheet.…”

Effect of foam copper interlayer on the mechanical properties and fretting wear of sandwich clinched joints

“…This enabled the height of the clinched point to be reduced and improved the joint strength. He et al (2017) dealt with the mechanical properties and fracture analysis of extensible die clinched joints in the dissimilar metal sheets combinations of titanium sheet material and aluminum sheet material. Kascak et al (2017) focused on the wear of the clinched die cavity used for joining microalloyed hot-dip galvanized advanced high-strength steel sheets H220PD+Z, they also compared the experimental data with the FEA numerical simulation results to substantiate the fact that the dominant part of wear is localized in the radius area surrounding the die cavity.…”