Reliability design of mechanical systems subjected to repetitive stresses

To enhance the design of mechanical systems, parametric Accelerated Life Testing (ALT) as a systematic reliability method is proposed as a way to evaluate the design of mechanical systems subjected to repeated impact stresses. It requires: (1) a parametric ALT scheme shaped on system BX lifetime, (2...

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Autores principales:	Woo Seong-woo, O’Neal Dennis L., Hassen Yimer Mohammed
Formato:	article
Lenguaje:	EN FR
Publicado:	EDP Sciences 2021
Materias:	Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/e4cec1f26c864dcdadfd10fba1adf0d4
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spelling	oai:doaj.org-article:e4cec1f26c864dcdadfd10fba1adf0d42021-12-02T17:13:46ZReliability design of mechanical systems subjected to repetitive stresses2261-236X10.1051/matecconf/202134903009https://doaj.org/article/e4cec1f26c864dcdadfd10fba1adf0d42021-01-01T00:00:00Zhttps://www.matec-conferences.org/articles/matecconf/pdf/2021/18/matecconf_iceaf2021_03009.pdfhttps://doaj.org/toc/2261-236XTo enhance the design of mechanical systems, parametric Accelerated Life Testing (ALT) as a systematic reliability method is proposed as a way to evaluate the design of mechanical systems subjected to repeated impact stresses. It requires: (1) a parametric ALT scheme shaped on system BX lifetime, (2) a load inspection, (3) parametric ALTs with the associated design modifications, and (4) an assessment of whether the revised product design(s) reach the targeted BX life-time. We propose using a general life-stress model and sample size equation. A test example using both market data and parametric ALT was the redesign of a hinge kit system (HKS) in a refrigerator. To conduct parametric ALTs, a force and moment balance analysis was utilized. The mechanical impact loadings of the HKS were evaluated for an working refrigerator door. For the first ALT, the HKS failure happened in the crack/fracture of the kit housing and oil spilled from the damper when the HKS was disassembled. The failure modes and mechanisms constructed in the 1st ALT were similar to those of the unsuccessful samples found from the marketplace. The missing design parameters of the HKS included stress raisers such as corner roundings and the rib of the housing in HKS, the seal in the oil damper, and the material of the cover housing. In the second ALT, the cover housing fractured. The design defect of the cover housing in the HKS was the plastic material. As a corrective action plan, the cover housing was modified from plastic to aluminium. After the second ALT, the lifetime of the modified HKS was reassured to be B1 life 10 years with a yearly failure rate of 0.1%.Woo Seong-wooO’Neal Dennis L.Hassen Yimer MohammedEDP SciencesarticleEngineering (General). Civil engineering (General)TA1-2040ENFRMATEC Web of Conferences, Vol 349, p 03009 (2021)
institution	DOAJ
collection	DOAJ
language	EN FR
topic	Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	Engineering (General). Civil engineering (General) TA1-2040 Woo Seong-woo O’Neal Dennis L. Hassen Yimer Mohammed Reliability design of mechanical systems subjected to repetitive stresses
description	To enhance the design of mechanical systems, parametric Accelerated Life Testing (ALT) as a systematic reliability method is proposed as a way to evaluate the design of mechanical systems subjected to repeated impact stresses. It requires: (1) a parametric ALT scheme shaped on system BX lifetime, (2) a load inspection, (3) parametric ALTs with the associated design modifications, and (4) an assessment of whether the revised product design(s) reach the targeted BX life-time. We propose using a general life-stress model and sample size equation. A test example using both market data and parametric ALT was the redesign of a hinge kit system (HKS) in a refrigerator. To conduct parametric ALTs, a force and moment balance analysis was utilized. The mechanical impact loadings of the HKS were evaluated for an working refrigerator door. For the first ALT, the HKS failure happened in the crack/fracture of the kit housing and oil spilled from the damper when the HKS was disassembled. The failure modes and mechanisms constructed in the 1st ALT were similar to those of the unsuccessful samples found from the marketplace. The missing design parameters of the HKS included stress raisers such as corner roundings and the rib of the housing in HKS, the seal in the oil damper, and the material of the cover housing. In the second ALT, the cover housing fractured. The design defect of the cover housing in the HKS was the plastic material. As a corrective action plan, the cover housing was modified from plastic to aluminium. After the second ALT, the lifetime of the modified HKS was reassured to be B1 life 10 years with a yearly failure rate of 0.1%.
format	article
author	Woo Seong-woo O’Neal Dennis L. Hassen Yimer Mohammed
author_facet	Woo Seong-woo O’Neal Dennis L. Hassen Yimer Mohammed
author_sort	Woo Seong-woo
title	Reliability design of mechanical systems subjected to repetitive stresses
title_short	Reliability design of mechanical systems subjected to repetitive stresses
title_full	Reliability design of mechanical systems subjected to repetitive stresses
title_fullStr	Reliability design of mechanical systems subjected to repetitive stresses
title_full_unstemmed	Reliability design of mechanical systems subjected to repetitive stresses
title_sort	reliability design of mechanical systems subjected to repetitive stresses
publisher	EDP Sciences
publishDate	2021
url	https://doaj.org/article/e4cec1f26c864dcdadfd10fba1adf0d4
work_keys_str_mv	AT wooseongwoo reliabilitydesignofmechanicalsystemssubjectedtorepetitivestresses AT onealdennisl reliabilitydesignofmechanicalsystemssubjectedtorepetitivestresses AT hassenyimermohammed reliabilitydesignofmechanicalsystemssubjectedtorepetitivestresses
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Reliability design of mechanical systems subjected to repetitive stresses

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