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Abstract

Lightweight aluminum alloys are widely used in automotive structural parts. Clinching (press-joining) is one of the most promising alternatives to welding for joining aluminum alloys, and as the failure of the joint is mainly caused by fatigue, the fatigue properties of the clinched joints directly affect the reliability and safety of the connected specimens. To gain a deeper understanding of this phenomenon, the static mechanical and fatigue properties of Al7075 aluminum alloy single-lap clinched joints were studied using static strength and tensile-tensile fatigue tests. The F–N curves of the joints were fitted using a straight-line and three-parameter power function method. The fractured samples and wear scars were analyzed by scanning electron microscopy and energy-dispersive spectroscopy. The results showed that the neck of the clinched joint and the upper sheet near the joint experienced the highest degree of fatigue fracture, the fretting wear debris consisted mainly of alumina and metallic aluminum, and the fretting wear was of a mode that differed from the two modes identified in the literature that we have dubbed “upper sheet inter-sheet region fretting wear.”

Keywords

Clinching aluminum alloy mechanical property fatigue property fretting wear mechanism

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References

Pearsons

Young

. Self-pierce riveting for sheet materials: state of the art. J Mater Process Technol 2008; 199: 27–36.

Mori

K-I

Abe

. A review on mechanical joining of aluminium and high strength steel sheets by plastic deformation. Int J Lightweight Mater Manuf 2018; 1: 1–11.

Wang

, et al. Self-piercing riveting of similar and dissimilar titanium sheet materials. Int J Adv Manuf Technol 2015; 80: 2105–2115.

Zhang

Xing

, et al. Mechanical properties of extensible die clinched joints in titanium sheet materials. Mater Des 2015; 71: 26–35.

Xing

Wang

, et al. Study of mechanical properties for copper alloy H62 sheets joined by self-piercing riveting and clinching. J Mater Process Technol 2015; 216: 28–36.

Barnes

Pashby

. Joining techniques for aluminium spaceframes used in automobiles: part II—adhesive bonding and mechanical fasteners. J Mater Process Technol 2000; 99: 72–79.

Mori

K-I

Bay

Fratini

, et al. Joining by plastic deformation. CIRP Ann 2013; 62: 673–694.

Oudjene

Ben-Ayed

. On the parametrical study of clinch joining of metallic sheets using the Taguchi method. Eng Struct 2008; 30: 1782–1788.

Eshtayen

Hrairi

. Multi objective optimization of clinching joints quality using grey-based Taguchi method. Int J Adv Manuf Technol 2016; 87: 233–249.

10.

Lambiase

Di Ilio

. Optimization of the clinching tools by means of integrated FE modeling and artificial intelligence techniques. Procedia Cirp 2013; 12: 163–168.

11.

Lambiase

. Clinch joining of heat-treatable aluminum AA6082-T6 alloy under warm conditions. J Mater Process Technol 2015; 225: 421–432.

12.

Lee

C-J

Kim

B-M

Kang

B-S

, et al. Improvement of joinability in a hole clinching process with aluminum alloy and carbon fiber reinforced plastic using a spring die. Compos Struct 2017; 173: 58–69.

13.

Gao

, et al. Investigations of join-ability and energy absorption of clinched joints in titanium and aluminum-lithium sheet materials. Mater Trans 2016; 57: 1849–1852.

14.

Lee

C-J

Lee

S-K

Kim

B-M

, et al. Failure mode dependent load bearing characteristics of mechanical clinching under mixed mode loading condition. Procedia Eng 2017; 207: 938–943.

15.

Lei

, et al. Failure modes of mechanical clinching in metal sheet materials. Thin-Walled Struct 2019; 144: 106281.

16.

Song

Yang

Zhu

, et al. Numerical and experimental study on failure behavior of steel-aluminium mechanical clinched joints under multiple test conditions. Int J Lightweight Mater Manuf 2019; 2: 72–79.

17.

Ball

. Fatigue behaviour of fastening joints of sheet materials and finite element analysis. Adv Mech Eng 2013; 5: 658219.

18.

Z-M

Lin

P-C

Lai

W-J

, et al. Fatigue analyses of self-piercing rivets and clinch joints in lap-shear specimens of aluminum sheets. Int J Fatigue 2015; 72: 53–65.

19.

Mori

Abe

Kato

. Mechanism of superiority of fatigue strength for aluminium alloy sheets joined by mechanical clinching and self-pierce riveting. J Mater Process Technol 2012; 212: 1900–1905.

20.

Carboni

Beretta

Monno

. Fatigue behaviour of tensile-shear loaded clinched joints. Eng Fract Mech 2006; 73: 178–190.

21.

Kim

H-K

. Fatigue strength evaluation of the clinched lap joints of a cold rolled mild steel sheet. J Mater Eng Perform 2013; 22: 294–299.

22.

Kim J

Kim H

. Fatigue behaviour of clinched joints in a steel sheet. Fatigue Fract Eng Mater Struct 2015; 38: 661–672.

23.

Hörhold

Müller

Merklein

, et al. Mechanical properties of an innovative shear-clinching technology for ultra-high-strength steel and aluminium in lightweight car body structures. Weld World 2016; 60: 613–620.

24.

Zhang

Zeng

, et al. Influence of heat treatment on mechanical properties of clinched joints in titanium alloy sheets. Int J Adv Manuf Technol 2017; 91: 3349–3361.

25.

Zhang

Wang

, et al. Study on failure mechanism of mechanical clinching in aluminium sheet materials. Int J Adv Manuf Technol 2018; 96: 3057–3068.

26.

Maier

Klingler

Böhm

, et al. Influence of material damage during the forming process on the vibration fatigue behaviour of a clinched connection. In: Proceedings of the MATEC Web of Conferences, EDP Sciences. 2018, 190: 12002.

27.

Hobbacher

. Fatigue design of welded joints and components: recommendations of IIW joint working group XIII-XV. Woodhead Publishing, 1996.

28.

Heidarian

Wang

. Review on seat suspension system technology development. Appl Sci 2019; 9: 2834.

29.

Lee

C-J

Kim

J-Y

Lee

S-K

, et al. Design of mechanical clinching tools for joining of aluminium alloy sheets. Mater Des 2010; 31: 1854–1861.

The fatigue fracture mechanism of Al7075 aluminum alloy clinching joints

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