Mechanical Behavior of Clinched Sheet Material Joints and Strength Design Procedure

He, Xiao Cong; Gao, Aifeng; Yang, Huiyan; Xing, Baoying

doi:10.12693/aphyspola.129.698

Cited by 9 publications

(4 citation statements)

References 11 publications

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“…The neck thickness of the TFC joint is greater than that of the initial clinched joint, which results in the higher tension-shear strength than that of initial clinched joint. Furthermore, the greatest force that the joints neck can be withstood, which can be equivalent to a ring subjected to shearing force [27,28]. As shown in Fig.…”

Section: Methodsmentioning

confidence: 99%

Static strength analysis and experimental research of clinched joints by two-stroke flattening clinching method

Peng

Chen

Ren

et al. 2022

Int J Adv Manuf Technol

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Clinching technology is widely used to join sheet materials in manufacturing fields, especially in automotive lightweight applications. However, the clinched joints have a weak static strength and high protuberance, which influence the application of the clinching technology. In order to improve the static strength and decrease the protuberance height of clinched joint, a new method to join aluminum alloy sheet materials with two-strokes flattening clinching (TFC) was investigated in this paper. The tension-shear strength, cross-tension strength, energy absorption and failure modes of clinched joint and TFC joint were investigated.Furthermore, the stiffness and the hardening exponent of the joints under different experimental tests were studied. The results indicated that the mechanical behaviors of the joints were optimal when the forming force was 35 kN. The maximum cross-tension and tension-shear strength of TFC joint were increased by 514 N and 1145 N on average compared with the initial clinched joint. The main failure modes of the joints were the neck fracture mode under the tension-shearing and cross-tension test. In addition, the stiffness and hardening exponent explained the variation of the mechanical properties of the joints under different forming forces.

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Section: Methodsmentioning

confidence: 99%

Static strength analysis and experimental research of clinched joints by two-stroke flattening clinching method

Peng

Chen

Ren

et al. 2022

Int J Adv Manuf Technol

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“…6. X. C. He et al [13] proposed Eq. 7 which requires the stress ratio (𝜎 𝑥 𝜎 𝑠 ⁄ ) that can be determined by a graph provided in [11].…”

Section: Lap Shear Testmentioning

confidence: 99%

“…The model by X.C. He presents an acceptable accuracy but is rather cumbersome because of the stress ratio (𝜎 𝑥 𝜎 𝑠 ⁄ ) that needs to be determined as described in [13].…”

Section: Achievements and Trends In Materials Formingmentioning

confidence: 99%

Data-Based and Analytical Models for Strength Prediction of Mechanical Joints

Vancraeynest

Jäckel²,

Coppieters³

et al. 2022

KEM

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Currently the design of mechanical joining processes like self-pierce riveting with semi-tubular rivet (SPR-ST) and clinching for production is subject to complex and experimental test series in which process parameters such as the rivet or die geometry are varied iteratively and based on experience until a suitable joint contour and strength is achieved. To simplify the use of mechanical joining technologies these development cycles and thereby the effort for implementation into production must be reduced. In this paper, the numerical data-acquisition and the development of algorithm-based and analytical models for strength prediction for SPR-ST and Clinching is described. Therefore, an extensive experimental and numerical database regarding the SPR-ST process and strength of steel and aluminum joints with tensile strengths of the sheets between 200 - 1000 MPa was generated for the building of the models. This process data could then be used for the training and evaluation of different prediction models. The goal of the research presented here is to enable an immediate prediction of the quasi-static joint strength, based on the input parameters such as properties of the parts to be joined and process parameters.

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“…Moreover, in order to predict the joint strength and its failure mode, Lee et al [16] proposed a procedure for the design of conventional mechanical clinching tools to determine the appropriate values of the geometrical interlocking parameters. Additionally, He et al [17] proposed a theoretical model for evaluating joint strength and experimentally verified its effectiveness as well.…”

Section: Introductionmentioning

confidence: 97%

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

Lee

Shen

Kim

et al. 2018

Metals

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The hole-clinching process is one of the mechanical methods for joining dissimilar materials, such as aluminum alloy with advanced high-strength steel, hot-pressed steel, and carbon fiber reinforced plastics, employing forming technology-based methods. In joint design, the analysis of the failure-mode dependent joint strength is a crucial step in achieving structural performance for practical applications. In this study, the influence of the geometrical interlocking parameters on the failure-mode dependent joint strength was investigated in order to design the geometrical interlocking shape of the hole-clinched joint to achieve a target joint strength. Moreover, the failure process of the hole-clinched joint under pullout loading condition was studied to determine the geometrical interlocking parameters that affect joint strength. Based on the results of the finite element analysis, an analytical approach for the failure-mode dependent joint strength was proposed to predict the strength of the hole-clinched joint. In addition, the proposed analytical approach was applied to the hole-clinching process with dissimilar materials. Its effectiveness was then verified using the cross-tension test. Accordingly, it was found that it was possible to predict the failure modes and joint strength with a maximum error of 7.8%.

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Mechanical Behavior of Clinched Sheet Material Joints and Strength Design Procedure

Cited by 9 publications

References 11 publications

Static strength analysis and experimental research of clinched joints by two-stroke flattening clinching method

Static strength analysis and experimental research of clinched joints by two-stroke flattening clinching method

Data-Based and Analytical Models for Strength Prediction of Mechanical Joints

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

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