Analysis of Failure-Mode Dependent Joint Strength in Hole Clinching from the Aspects of Geometrical Interlocking Parameters

Lee, Chan-Joo; Shen, Guo Qiang; Kim, Byung-Min; Lambiase, F.; Ko, Dae-Cheol

doi:10.3390/met8121020

Cited by 16 publications

(5 citation statements)

References 19 publications

(23 reference statements)

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“…There are two main categories of clinched joint failure modes, one is button separation mode, and the other is neck fracture mode [26,27]. The interlock and the neck thickness of the joint are the decisive factors that determine the failure modes.…”

Section: Failure Modementioning

confidence: 99%

Joining thin-walled structures without protuberance by two-strokes flattening clinching process

Peng

Chen

et al. 2021

Int J Adv Manuf Technol

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Clinching technologies have better performance in joining different sheet materials. However, the protuberance and mechanical behaviors of clinched joints have always been needed to be improved. In this paper, a new clinching method, named two-strokes attening clinching (TFC) process, was proposed to improve the mechanical behaviors of joints and atten the protuberance. Mechanical testing including tension shearing tests were employed under quasi-static conditions to evaluate the different mechanical behaviors between TFC and conventional clinched joints. The in uences of the different forming forces on mechanical response of these joints were studied. The static strength, energy absorption, material ow and failure modes of TFC and conventional clinched joints were investigated comparatively. The experimental results demonstrated that the tension-shear strength of TFC clinched joints was increased by 30.3% compared with conventional clinched joints at the forming force of 30 kN. Furthermore, the material ow analysis showed that the thickness and interlock of TFC clinched joints were increased by 79% and 45.9%, respectively. The energy absorption of TFC clinched joint was increased by 82%. In addition, the TFC process did not change the failure mode of clinched joints, and the failure mode of all clinched joints was neck fracture.

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Section: Failure Modementioning

confidence: 99%

Joining thin-walled structures without protuberance by two-strokes flattening clinching process

Peng

Chen

et al. 2021

Int J Adv Manuf Technol

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“…However, mechanical clinching is more suitable to produce hybrid metal-polymer connections rather than polymer-polymer ones. Actually, despite a certain number of scientific works concerning the clinching of hybrid connections involving polymers or reinforced polymers [8][9][10][11], so far any experimental evidence for the feasibility of clinching has not been provided concerning polymer joining. Mechanical fastening can be performed by the adoption of external fastener, direct molding of connector elements (such as snap-fits) as well as thermoforming of the plastics regions, as summarized in Table 1.…”

Section: Mechanical Fasteningmentioning

confidence: 99%

Friction Stir Welding and Friction Spot Stir Welding Processes of Polymers—State of the Art

2020

Self Cite

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In the last decade, the friction stir welding of polymers has been increasingly investigated by the means of more and more sophisticated approaches. Since the early studies, which were aimed at proving the feasibility of the process for polymers and identifying suitable processing windows, great improvements have been achieved. This owes to the increasing care of academic researchers and industrial demands. These improvements have their roots in the promising results from pioneer studies; however, they are also the fruits of the adoption of more comprehensive approaches and the multidisciplinary analyses of results. The introduction of instrumented machines has enabled the online measurement of processing loads and temperature, and critical understanding of the principal aspects affecting the material flow and welds quality. Such improvements are also clearly demonstrated by the increase of the strength of recent joints (up to 99% of joining efficiency) as compared to those reached in early researches (almost 47%). This article provides a comprehensive review of the recent progresses on the process fundamentals, quality assessment and the influence of process parameters on the mechanical behavior. In addition, emphasis is given to new developments and future perspectives.

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“…Modifications to this technology are being introduced, such as additional local heating of the materials before joining [7] or welding the bottom of the embossment [8]. Another modification of clinching joining technology is joining sheets with a hole already made in the lower layer [9]. This method is suitable for joining composites with metals.…”

Section: Introductionmentioning

confidence: 99%

Performance Tests of HX340 Microalloyed Steel Sheets Joined Using Clinch-Rivet Technology

Boda,

Mucha,

Witkowski

2024

Materials

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This paper presents the possibility of forming a pressed joint between two 1.5 mm thick sheets made of HX340 steel. The joint was formed using an additional deformable steel rivet with a hardness of 400HV1. Different distances of rivet pressing below the initial surface of the upper sheet were chosen: 0, 0.15, 0.30, 0.45 and 0.60 (in mm). For the mentioned rivet-pressing distances, forming tests were performed using an “SKB” die with three die depths: 1.45, 1.60 and 1.75 (in mm). Observations and measurements of the characteristic geometric dimensions of the interlock were made. Furthermore, the strength of the clinch-riveted joints was analysed. Changing the depth of the die by 20%, i.e., from hd = 1.45 mm to hd = 1.75 mm for the same rivet press-in depth (of = 0%), resulted in a 12% reduction in the forming-force value. The maximum load capacity of the joint in the shear test decreased by 3.5% for the mentioned joint variant. The greater the rivet press-in depth used in the joint (of), the greater the value of the interlock size (tu). Increasing the value of rivet-pressing depth below the initial surface of the upper sheet from 0 mm to 0.6 mm resulted in an increase in the size of the interlock (tu) by 136% (for hd = 1.45 mm), by 128% (for hd = 1.60 mm) and by 85% (for hd = 1.75 mm).

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Analysis of Failure-Mode Dependent Joint Strength in Hole Clinching from the Aspects of Geometrical Interlocking Parameters

Cited by 16 publications

References 19 publications

Joining thin-walled structures without protuberance by two-strokes flattening clinching process

Joining thin-walled structures without protuberance by two-strokes flattening clinching process

Friction Stir Welding and Friction Spot Stir Welding Processes of Polymers—State of the Art

Performance Tests of HX340 Microalloyed Steel Sheets Joined Using Clinch-Rivet Technology

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