Fatigue behaviour of a spring: a case study

A durability design case study concerning a U spring is presented. For a given geometry of the component, the question was to predict the maximum permissible displacement per cycle whilst ensuring a service life of at least 260 kcycles. The stiffness of the spring was evaluated using the finite elem...

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Autores principales:	Graça Nuno, de Castro Paulo M. S. T.
Formato:	article
Lenguaje:	EN FR
Publicado:	EDP Sciences 2021
Materias:	Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/d070449521cc469e8d5a45172d7165c8
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spelling	oai:doaj.org-article:d070449521cc469e8d5a45172d7165c82021-12-02T17:13:46ZFatigue behaviour of a spring: a case study2261-236X10.1051/matecconf/202134904009https://doaj.org/article/d070449521cc469e8d5a45172d7165c82021-01-01T00:00:00Zhttps://www.matec-conferences.org/articles/matecconf/pdf/2021/18/matecconf_iceaf2021_04009.pdfhttps://doaj.org/toc/2261-236XA durability design case study concerning a U spring is presented. For a given geometry of the component, the question was to predict the maximum permissible displacement per cycle whilst ensuring a service life of at least 260 kcycles. The stiffness of the spring was evaluated using the finite elements software SolidWorks. As an approximation a linear model was used in the finite elements analysis, which was also compared with an analytical treatment based on Castigliano’s theorem. Using a given safety factor, a high cycle fatigue analysis was performed assuming the use of a steel with 650 MPa ultimate tensile strength. The spring is either loaded by an imposed displacement, or it is load free, i.e. load ratio (minimum load / maximum load per cycle), is R = -1. An algorithm based on finite fatigue life prediction techniques, the Basquin and Goodman diagrams, and the relationship between ultimate tensile strength and fatigue limit was used and will be briefly presented and discussed. Also, the stress analysis helped to highlight the need for some minor geometry changes. The outcome of the study was the evaluation of the maximum permissible displacement per cycle, as required in the real life case addressed.Graça Nunode Castro Paulo M. S. T.EDP SciencesarticleEngineering (General). Civil engineering (General)TA1-2040ENFRMATEC Web of Conferences, Vol 349, p 04009 (2021)
institution	DOAJ
collection	DOAJ
language	EN FR
topic	Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	Engineering (General). Civil engineering (General) TA1-2040 Graça Nuno de Castro Paulo M. S. T. Fatigue behaviour of a spring: a case study
description	A durability design case study concerning a U spring is presented. For a given geometry of the component, the question was to predict the maximum permissible displacement per cycle whilst ensuring a service life of at least 260 kcycles. The stiffness of the spring was evaluated using the finite elements software SolidWorks. As an approximation a linear model was used in the finite elements analysis, which was also compared with an analytical treatment based on Castigliano’s theorem. Using a given safety factor, a high cycle fatigue analysis was performed assuming the use of a steel with 650 MPa ultimate tensile strength. The spring is either loaded by an imposed displacement, or it is load free, i.e. load ratio (minimum load / maximum load per cycle), is R = -1. An algorithm based on finite fatigue life prediction techniques, the Basquin and Goodman diagrams, and the relationship between ultimate tensile strength and fatigue limit was used and will be briefly presented and discussed. Also, the stress analysis helped to highlight the need for some minor geometry changes. The outcome of the study was the evaluation of the maximum permissible displacement per cycle, as required in the real life case addressed.
format	article
author	Graça Nuno de Castro Paulo M. S. T.
author_facet	Graça Nuno de Castro Paulo M. S. T.
author_sort	Graça Nuno
title	Fatigue behaviour of a spring: a case study
title_short	Fatigue behaviour of a spring: a case study
title_full	Fatigue behaviour of a spring: a case study
title_fullStr	Fatigue behaviour of a spring: a case study
title_full_unstemmed	Fatigue behaviour of a spring: a case study
title_sort	fatigue behaviour of a spring: a case study
publisher	EDP Sciences
publishDate	2021
url	https://doaj.org/article/d070449521cc469e8d5a45172d7165c8
work_keys_str_mv	AT gracanuno fatiguebehaviourofaspringacasestudy AT decastropaulomst fatiguebehaviourofaspringacasestudy
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Fatigue behaviour of a spring: a case study

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