Estimation of fatigue life for clinched joints with the Local Strain Approach incorporating the impact of cold forming to cyclic material properties

Joining by forming is a commonly applied technique in the automotive industry to assemble parts of thin metal sheets to meet the demands of lightweight design. The joining operation induces changes in material behaviour due to cold forming, that can be observed in increased hardness in the area clos...

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Autores principales:	Spak Boris, Schlicht Maximilian, Nowak Karina, Kästner Markus, Froitzheim Pascal, Flügge Wilko, Fiedler Melanie
Formato:	article
Lenguaje:	EN FR
Publicado:	EDP Sciences 2021
Materias:	Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/9159d8cdac05403c91cf732cddf99c89
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id	oai:doaj.org-article:9159d8cdac05403c91cf732cddf99c89
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spelling	oai:doaj.org-article:9159d8cdac05403c91cf732cddf99c892021-12-02T17:13:46ZEstimation of fatigue life for clinched joints with the Local Strain Approach incorporating the impact of cold forming to cyclic material properties2261-236X10.1051/matecconf/202134904005https://doaj.org/article/9159d8cdac05403c91cf732cddf99c892021-01-01T00:00:00Zhttps://www.matec-conferences.org/articles/matecconf/pdf/2021/18/matecconf_iceaf2021_04005.pdfhttps://doaj.org/toc/2261-236XJoining by forming is a commonly applied technique in the automotive industry to assemble parts of thin metal sheets to meet the demands of lightweight design. The joining operation induces changes in material behaviour due to cold forming, that can be observed in increased hardness in the area close to the joint neck compared to the base material. Complex geometrical features of clinched joints on a small scale and the lack of non-destructive methods to track local stresses and strains require a combined approach utilizing numerical and experimental techniques. Numerical process and loading simulation are performed utilizing commercial finite element software LS-Dyna®. Hardness measurements in the joint are carried out to assess the impact of forming operation. Cyclic material properties are derived from Vickers hardness to estimate fatigue life with the Local Strain Approach using the damage parameter PSWT. Fatigue life estimation with failure criterion crack initiation obtained from simulation results is compared to those from experiments. The results obtained indicate that the Local Strain Approach is suitable for fatigue life estimations of clinched joints under constant amplitude loading as long as the influence of the forming process is considered.Spak BorisSchlicht MaximilianNowak KarinaKästner MarkusFroitzheim PascalFlügge WilkoFiedler MelanieEDP SciencesarticleEngineering (General). Civil engineering (General)TA1-2040ENFRMATEC Web of Conferences, Vol 349, p 04005 (2021)
institution	DOAJ
collection	DOAJ
language	EN FR
topic	Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	Engineering (General). Civil engineering (General) TA1-2040 Spak Boris Schlicht Maximilian Nowak Karina Kästner Markus Froitzheim Pascal Flügge Wilko Fiedler Melanie Estimation of fatigue life for clinched joints with the Local Strain Approach incorporating the impact of cold forming to cyclic material properties
description	Joining by forming is a commonly applied technique in the automotive industry to assemble parts of thin metal sheets to meet the demands of lightweight design. The joining operation induces changes in material behaviour due to cold forming, that can be observed in increased hardness in the area close to the joint neck compared to the base material. Complex geometrical features of clinched joints on a small scale and the lack of non-destructive methods to track local stresses and strains require a combined approach utilizing numerical and experimental techniques. Numerical process and loading simulation are performed utilizing commercial finite element software LS-Dyna®. Hardness measurements in the joint are carried out to assess the impact of forming operation. Cyclic material properties are derived from Vickers hardness to estimate fatigue life with the Local Strain Approach using the damage parameter PSWT. Fatigue life estimation with failure criterion crack initiation obtained from simulation results is compared to those from experiments. The results obtained indicate that the Local Strain Approach is suitable for fatigue life estimations of clinched joints under constant amplitude loading as long as the influence of the forming process is considered.
format	article
author	Spak Boris Schlicht Maximilian Nowak Karina Kästner Markus Froitzheim Pascal Flügge Wilko Fiedler Melanie
author_facet	Spak Boris Schlicht Maximilian Nowak Karina Kästner Markus Froitzheim Pascal Flügge Wilko Fiedler Melanie
author_sort	Spak Boris
title	Estimation of fatigue life for clinched joints with the Local Strain Approach incorporating the impact of cold forming to cyclic material properties
title_short	Estimation of fatigue life for clinched joints with the Local Strain Approach incorporating the impact of cold forming to cyclic material properties
title_full	Estimation of fatigue life for clinched joints with the Local Strain Approach incorporating the impact of cold forming to cyclic material properties
title_fullStr	Estimation of fatigue life for clinched joints with the Local Strain Approach incorporating the impact of cold forming to cyclic material properties
title_full_unstemmed	Estimation of fatigue life for clinched joints with the Local Strain Approach incorporating the impact of cold forming to cyclic material properties
title_sort	estimation of fatigue life for clinched joints with the local strain approach incorporating the impact of cold forming to cyclic material properties
publisher	EDP Sciences
publishDate	2021
url	https://doaj.org/article/9159d8cdac05403c91cf732cddf99c89
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Estimation of fatigue life for clinched joints with the Local Strain Approach incorporating the impact of cold forming to cyclic material properties

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