Study on failure mechanism of mechanical clinching in aluminium sheet materials

Mechanical clinching is a connection technology that is widely used in different industrial fields because it has several advantages, including easy preparation, an excellent fatigue property and environmental friendliness. In this study, tensile-shear tests and fatigue tests were conducted to characterize the mechanical properties of clinched joints using aluminium alloys. The experimental results showed that the fracture regions were concentrated in the indentations of the lower sheets. The failed surfaces were examined using a scanning electron microscope and an energy-dispersive X-ray machine to study the fretting fatigue failure mechanisms of the clinched joints. Two types of fretting wear modes were observed: the neck fretting wear mode and indentation-surrounding fretting wear mode. The results also showed that the proportions of these two fretting wear modes could be impacted by the applied load levels.

[1]  Marion Merklein,et al.  Mechanical properties of an innovative shear-clinching technology for ultra-high-strength steel and aluminium in lightweight car body structures , 2016, Welding in the World.

[2]  Toru Kato,et al.  Mechanism of superiority of fatigue strength for aluminium alloy sheets joined by mechanical clinching and self-pierce riveting , 2012 .

[3]  Wolfram Volk,et al.  Influence of tool elasticity on process forces and joint properties during clinching with rotational tool movement , 2017 .

[4]  Dimitri Debruyne,et al.  Numerical and experimental study of the multi-axial quasi-static strength of clinched connections , 2013 .

[5]  Stefano Beretta,et al.  Fatigue behaviour of tensile-shear loaded clinched joints , 2006 .

[6]  Francesco Lambiase,et al.  Influence of process parameters in mechanical clinching with extensible dies , 2013 .

[7]  Simon Wohletz,et al.  Joining by forming—A review on joint mechanisms, applications and future trends , 2014 .

[8]  Dimitri Debruyne,et al.  Equivalent modelling strategy for a clinched joint using a simple calibration method , 2017 .

[9]  J. Mucha,et al.  The Application of Laboratory X-Ray Micro-Diffraction to Study the Effects of Clinching Process in Steel Sheets , 2016 .

[10]  Jacek Mucha,et al.  The analysis of lock forming mechanism in the clinching joint , 2011 .

[11]  Jwo Pan,et al.  Fatigue analyses of self-piercing rivets and clinch joints in lap-shear specimens of aluminum sheets , 2015 .

[12]  Xiaocong He,et al.  Clinching for sheet materials , 2017, Science and technology of advanced materials.

[13]  Waldemar Witkowski,et al.  The clinching joints strength analysis in the aspects of changes in the forming technology and load conditions , 2014 .

[14]  Jacek Mucha,et al.  Joining the car-body sheets using clinching process with various thickness and mechanical property arrangements , 2011 .

[15]  Juha Varis,et al.  Ensuring the integrity in clinching process , 2006 .

[16]  Fengshou Gu,et al.  Fatigue Behaviour of Fastening Joints of Sheet Materials and Finite Element Analysis , 2013 .

[17]  Shengdun Zhao,et al.  Experimental study on the height-reduced joints to increase the cross-tensile strength , 2017 .

[18]  Chao Chen,et al.  Investigation of mechanical behavior of the reshaped joints realized with different reshaping forces , 2016 .

[19]  Ľ. Kaščák,et al.  Joining materials used in car body production by clinching , 2012 .

[20]  Tomoyoshi Maeno,et al.  Punching of ultra-high strength steel sheets using local resistance heating of shearing zone , 2012 .

[21]  Fabrizio Micari,et al.  Joining by plastic deformation , 2013 .

[22]  Francesco Lambiase,et al.  Joinability of different thermoplastic polymers with aluminium AA6082 sheets by mechanical clinching , 2015 .

[23]  Ľ. Kaščák,et al.  FEM Analysis of Clinching Tool Load in a Joint of Dual-Phase Steels , 2016, Strength of Materials.

[24]  Toru Kato,et al.  Joining of high strength steel and aluminium alloy sheets by mechanical clinching with dies for control of metal flow , 2012 .

[25]  Shengdun Zhao,et al.  Experimental Investigation on the Joining of Aluminum Alloy Sheets Using Improved Clinching Process , 2017, Materials.

[26]  Shengdun Zhao,et al.  Use of a modified Gurson model for the failure behaviour of the clinched joint on Al6061 sheet , 2014 .

[27]  Byung-Min Kim,et al.  Parametric study on mechanical clinching process for joining aluminum alloy and high-strength steel sheets , 2010 .

[28]  F. Gu,et al.  Influence of heat treatment on mechanical properties of clinched joints in titanium alloy sheets , 2017, The International Journal of Advanced Manufacturing Technology.

[29]  C. Borsellino,et al.  Durability of hybrid clinch-bonded steel/aluminum joints in salt spray environment , 2016 .

[30]  Meftah Hrairi,et al.  Clinching process for joining dissimilar materials: state of the art , 2016 .

[31]  Qing Liu,et al.  Joining different metallic sheets without protrusion by flat hole clinching process , 2016 .

[32]  Sheng-dun Zhao,et al.  The experimental analysis of shear strength of round joints , 2014 .

[33]  S. T. Amancio-Filho,et al.  Mechanical and failure behaviour of hybrid polymer–metal staked joints , 2013 .

[34]  R. Rolfes,et al.  Finite deformation model for short fiber reinforced composites: Application to hybrid metal-composite clinching joints , 2016 .

[35]  S. T. Amancio-Filho,et al.  On the feasibility of a friction-based staking joining method for polymer-metal hybrid structures , 2016 .

[36]  C. Borsellino,et al.  Effect of corrosion degradation on failure mechanisms of aluminium/steel clinched joints , 2015 .

[37]  Andrew Ball,et al.  A review of numerical analysis of friction stir welding , 2014 .

[38]  Tong Guo,et al.  High-accuracy servo press system for the clinching joint process , 2017 .

[39]  Zhongqin Lin,et al.  Evaluation of fracture limit in automotive aluminium alloy sheet forming , 2007 .

[40]  Shengdun Zhao,et al.  Mechanical properties of the two-steps clinched joint with a clinch-rivet , 2016 .

[41]  Ho-Kyung Kim.  Fatigue Strength Evaluation of the Clinched Lap Joints of a Cold Rolled Mild Steel Sheet , 2012, Journal of Materials Engineering and Performance.

[42]  Byung-Min Kim,et al.  Design of hole-clinching process for joining of dissimilar materials – Al6061-T4 alloy with DP780 steel, hot-pressed 22MnB5 steel, and carbon fiber reinforced plastic , 2014 .

[43]  A. Di Ilio,et al.  Joining aluminium alloys with reduced ductility by mechanical clinching , 2015 .

[44]  Xiaocong He,et al.  Influence of boundary conditions on stress distributions in a single-lap adhesively bonded joint , 2014 .

[46]  Jacek Mucha,et al.  The Experimental Analysis of Forming and Strength of Clinch Riveting Sheet Metal Joint Made of Different Materials , 2013 .

[47]  Shengdun Zhao,et al.  Investigation of the height-reducing method for clinched joint with AL5052 and AL6061 , 2017 .