Specimen's Geometry Related Influences on Load-Bearing Capacity of Joining Aluminium and UHSS by Innovative Shear-Clinching

Hörhold, Réjane; Mûller, Martín; Merklein, Marion; Meschut, Gerson

doi:10.5539/jmsr.v6n4p19

Cited by 7 publications

(4 citation statements)

References 13 publications

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“…A servo motor-driven clinching system ECKOLD DFG 500/150E with a feed speed of 40 mm/s was applied for joining. With regard to the shear-clinching system following [15], the punch-side tool set has an inner diameter di = 5.6 mm, the outer punch radius r = 6.0 mm. An opening die was positioned on the die side.…”

Section: /1mentioning

confidence: 99%

A method for three-dimensional modelling of the shear-clinching process

Han¹,

Yang²,

Meschut³

2021

Esaform 2021

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Three-dimensional modelling enables to determine the in-plane material flow in asymmetrical situation. Thus, the distortion of the sheets to be joined can be characterized more exactly. This study shows a method for building up a three-dimensional shear-clinching framework without damage criteria. In fact, the die-sided sheet in shear-clinching was designed as a pre-punched sheet and slugs. The material separation in the die-sided joining partner, which in two-dimensional simulation is often described by macro- and micromechanical fracture criteria, was realised in this study based on a defined contact condition. By means of a shear-cutting simulation, a correlation between the break angle and the separation stress was determined, which was used as a separation criterion in the shear-clinching simulation. The separation line was confirmed using post-particles. To validate this model, the results of the simulation using a quadratic single-point specimen were compared to the experiments with respect to the distortion of the joining partner. In general, the built three-dimensional framework provides for further tool developments with regard to the reduction of distortion in shear-clinching.

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Section: /1mentioning

confidence: 99%

A method for three-dimensional modelling of the shear-clinching process

Han¹,

Yang²,

Meschut³

2021

Esaform 2021

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“…In [10], it was shown that the maximum joining force differed by 7% when joining single lap shear tensile and cross tensile specimens due to the changed edge distances. The shear-clinching joint has a smaller edge distance of 8 mm in the single lap shear tensile specimen, so more aluminium is pressed out of the joining zone, which led to decreasing the volume of aluminium in the joining zone and reducing the joining force.…”

Section: Experimental Conditionsmentioning

confidence: 99%

“…For realising the shear-clinching joining, a c-shaped stand machine with a maximum load of 150 kN is used, which shows a high-rigidity until a load approaches 65 kN. The experimental setup of the tool follows the condition in [10]. In the investigations, only the joints are produced, which are classified as a good shear-clinched joint in [11].…”

mentioning

confidence: 99%

Shear-Clinching of Multi-Element Specimens of Aluminium Alloy and Ultra-High-Strength Steel

Han

Hörhold

Mûller

et al. 2018

KEM

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The newly developed joining-by-forming technology “shear-clinching”, features a potentially single-stage process for joining UHSS without requiring any additional elements. Foundational studies have focused on the functionality of shear-clinching at a one-element sample. To ensure the safety of the industrial application of the shear-clinching technology, an investigation with component-like samples with several joints is required. This paper presents a detailed analysis of the material behaviour during the shear-clinching process with multi-element specimens to evaluate the influence of the neighbouring joints. In order to describe the influence of the neighbouring joints, the deformations resulting from the bending and material displacement are recorded without contact after the joining process: locally around the joining point and globally over the entire sample size. To minimize such bending effects, a tool-sided adaptation is provided. The results show the high potential of shear-clinching joining by UHSS and give further recommendations for future multi-material application.

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“…Therefore, new and innovative joining techniques are required for joining such combination of steel and aluminum sheets in general [5]. The main problem of joining steel and aluminum sheets is in their different level of the melting temperatures and the presence of the surface oxide layer high heat conductivity (in the case of aluminum) hence they are difficult to weld.…”

Section: Introductionmentioning

confidence: 99%

The Evaluation of Properties of Mechanically Clinched Joints Made of Ferrous and Non-Ferrous Materials

Kaščák¹,

Spišák²,

Kubík³

et al. 2018

Adv. Sci. Technol. Res. J.

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Nowadays, there are several reasons for the utilization of the sheets made of aluminum in the car body production. Besides decreasing the car body weight, there is a need to reduce fuel consumption of the vehicle as well as the environmental impact by lower production of emissions. Moreover, such reasons are mutually dependent or influence each other. The application of the aluminum sheets in hybrid car body production resulted in the need for innovative joining techniques, which could make it possible to successfully join sheets from aluminum alloys. Mechanical clinching is one of the new or innovative joining techniques, which belongs to cold-forming joining process, which makes it possible to join different kinds and thicknesses of sheets. Individual materials and thicknesses can be combined. The mechanically clinched joints are durable, and the joining process duration is very fast (duration of 1s) and does not have a distinctive impact on the environment; a protective layer of the sheets remains intact. The paper focuses on the evaluation of the properties of hybrid joints that were prepared by the single stroke clinching process with a rigid die. The hot-dip galvanized steel sheets DC06 and H220PD combined with the sheets from aluminum alloys EN AW 5754 (having different values of the hardness-H11, H22, and H24) and EN AW 6082 were used for joining. The results from experiments confirmed the mechanical clinching is the suitable technique for joining such combination of sheets. However, some considerations, such as the arrangement of the sheets about the punch and die, must be regarded.

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Specimen's Geometry Related Influences on Load-Bearing Capacity of Joining Aluminium and UHSS by Innovative Shear-Clinching

Cited by 7 publications

References 13 publications

A method for three-dimensional modelling of the shear-clinching process

A method for three-dimensional modelling of the shear-clinching process

Shear-Clinching of Multi-Element Specimens of Aluminium Alloy and Ultra-High-Strength Steel

The Evaluation of Properties of Mechanically Clinched Joints Made of Ferrous and Non-Ferrous Materials

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