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1

The numerical analysis of the effect of the joining process parameters on self-piercing riveting using the solid rivet

Mucha J.

Archives of Civil and Mechanical Engineering

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2014

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Vol. 14, no. 3

444--454

EN

This paper presents the numerical modeling of the self-piercing riveting using the solid rivet. The joint forming capabilities were presented using the FEM analysis, on the example of two steel sheets made of DC01, and on the example where the upper sheet was made of DC01 and the lower sheet was made of EN AW-AlMg3 aluminum alloy. The numerical analysis of the joint forming was performed using sheets of identical thickness of 1.5 mm and at conventional tool movements. The effect of the layout change and the number of grooves in the universal rivet on the stress distribution were determined. In this paper, the groove filling with the joined sheet material depending on selected factors of the joining process was also compared. The capabilities of joining with a different tool movement solution were presented. The correctness of the numerical model was validated based on metallographic researches and the force characteristics of the process.

2

Examination of the influence of pressing parameters on strength and geometry of joint between aluminum plate and sheet metal

Kowalik M., Trzepieciński T.

Archives of Civil and Mechanical Engineering

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2012

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Vol. 12, no. 3

292--298

EN

The paper presents technology of fastening of elements made of sheet metal with machine elements of much greater thicknesses (i.e. metal plates) by cold plastic press-joining. The fastening technology consists of inserting the thinner element into a channel on the surface of the plate and pressing by two punches arranged symmetrically along the channel edges. Under the effect of cold plastic strain in the plate, the sheet-metal element is thinned, and one obtains the so-called dovetail joint characterized by good tightness and high electric and thermal conductivity. In the paper, the authors present the results of numerical simulation of a plate–sheet metal joint. The investigation was performed in order to determine the influence of technological parameters of the press-joining process on the quality of contact between the joined elements. The following parameters were analyzed: the distance between the sheet and the punch, the shape of punch's working surface, and the depth of punch sink. The joint between the elements and its characteristics were modeled numerically by the FEM method. The correctness of numerical simulation was verified by metallographic examination and strength tests. FEM simulation proved fully consistent with experimental results.

3

The use of thin-walled sections for energy absorbing components: a review

Bartczak B., Gierczycka-Zbrożek D., Gronostajski Z., Polak S., Tobota A.

Archives of Civil and Mechanical Engineering

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2010

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Vol. 10, no 4

5-19

EN

This paper presents the key aspects of the use of thin-walled sections for collision energy absorbing components. The process of deformation of thin-walled structures and the parameters expressing their energy absorption are described in detail. The research on improving the energy absorption of thin-walled sections, through the use of, e.g., tailored blanks, polyurethane foams and mechanical joining methods, conducted for many years in the Institute of Production Engineering and Automation at Wrocław University of Technology is reported.

PL

Przedstawiono najważniejsze aspekty związane z zastosowaniem struktur cienkościennych w elementach pochłaniających energię zderzenia. Szczegółowo omówiono proces deformacji struktur cienkościennych oraz parametry opisujące ich energochłonność. Opisano także metody poprawy energochłonności struktur cienkościennych łączonych techniką tailored blanks, poprzez przetłaczanie mechaniczne oraz wypełnianych pianką poliuretanową, testowane w Instytucie Technologii Maszyn i Automatyzacji Politechniki Wrocławskiej.