Computer-Aided Reengineering towards Plastic Part Failure Minimization

The work reported here intends to identify and mitigate the causes for failure in a plastic faucet holder, a part of an integral float faucet with a well-documented history of fracture occurrence. A methodology for the identification of hidden internal defects in plastic parts and the elaboration of...

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Autores principales:	Tiago Pinho, Tatiana Zhiltsova, Mónica Oliveira, Andreia Costa
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	thermoplastics mechanical behaviour volumetric shrinkage residual stress designing for mouldability numerical simulation Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
Acceso en línea:	https://doaj.org/article/c174d3df99b645688e50c2e81c0e153c
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spelling	oai:doaj.org-article:c174d3df99b645688e50c2e81c0e153c2021-11-11T17:52:34ZComputer-Aided Reengineering towards Plastic Part Failure Minimization10.3390/ma142163031996-1944https://doaj.org/article/c174d3df99b645688e50c2e81c0e153c2021-10-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/21/6303https://doaj.org/toc/1996-1944The work reported here intends to identify and mitigate the causes for failure in a plastic faucet holder, a part of an integral float faucet with a well-documented history of fracture occurrence. A methodology for the identification of hidden internal defects in plastic parts and the elaboration of the required corrective actions towards quality improvement is, therefore, presented. Firstly, part defects were identified via injection moulding process numerical simulation. The latter has enabled the prediction of an excessive volumetric shrinkage at the core of the faucet holder, highlighting the presence of internal voids and, hence, the possible deterioration of the load-bearing capacity. The supposition was later confirmed by X-ray topography scans. Part reengineering, consisting of localized thickness reduction, was the option chosen for decreasing the high shrinkage at the core. For validation purposes, structural analyses were carried out, with and without accounting for the injection moulding processing history. The results obtained during part structural analysis have enabled us to conclude that, when taking into account the residual stresses generated during injection moulding, the analysis more closely reflects the experimental data and allows us to implicitly envisage the propensity to fracture. Moreover, the part modifications, undertaken during the faucet holder reengineering, led to the reduction of the cumulative (processing and imposed by load) stresses by 50%, when compared to the original design analysed.Tiago PinhoTatiana ZhiltsovaMónica OliveiraAndreia CostaMDPI AGarticlethermoplasticsmechanical behaviourvolumetric shrinkageresidual stressdesigning for mouldabilitynumerical simulationTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 6303, p 6303 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	thermoplastics mechanical behaviour volumetric shrinkage residual stress designing for mouldability numerical simulation Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
spellingShingle	thermoplastics mechanical behaviour volumetric shrinkage residual stress designing for mouldability numerical simulation Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 Tiago Pinho Tatiana Zhiltsova Mónica Oliveira Andreia Costa Computer-Aided Reengineering towards Plastic Part Failure Minimization
description	The work reported here intends to identify and mitigate the causes for failure in a plastic faucet holder, a part of an integral float faucet with a well-documented history of fracture occurrence. A methodology for the identification of hidden internal defects in plastic parts and the elaboration of the required corrective actions towards quality improvement is, therefore, presented. Firstly, part defects were identified via injection moulding process numerical simulation. The latter has enabled the prediction of an excessive volumetric shrinkage at the core of the faucet holder, highlighting the presence of internal voids and, hence, the possible deterioration of the load-bearing capacity. The supposition was later confirmed by X-ray topography scans. Part reengineering, consisting of localized thickness reduction, was the option chosen for decreasing the high shrinkage at the core. For validation purposes, structural analyses were carried out, with and without accounting for the injection moulding processing history. The results obtained during part structural analysis have enabled us to conclude that, when taking into account the residual stresses generated during injection moulding, the analysis more closely reflects the experimental data and allows us to implicitly envisage the propensity to fracture. Moreover, the part modifications, undertaken during the faucet holder reengineering, led to the reduction of the cumulative (processing and imposed by load) stresses by 50%, when compared to the original design analysed.
format	article
author	Tiago Pinho Tatiana Zhiltsova Mónica Oliveira Andreia Costa
author_facet	Tiago Pinho Tatiana Zhiltsova Mónica Oliveira Andreia Costa
author_sort	Tiago Pinho
title	Computer-Aided Reengineering towards Plastic Part Failure Minimization
title_short	Computer-Aided Reengineering towards Plastic Part Failure Minimization
title_full	Computer-Aided Reengineering towards Plastic Part Failure Minimization
title_fullStr	Computer-Aided Reengineering towards Plastic Part Failure Minimization
title_full_unstemmed	Computer-Aided Reengineering towards Plastic Part Failure Minimization
title_sort	computer-aided reengineering towards plastic part failure minimization
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/c174d3df99b645688e50c2e81c0e153c
work_keys_str_mv	AT tiagopinho computeraidedreengineeringtowardsplasticpartfailureminimization AT tatianazhiltsova computeraidedreengineeringtowardsplasticpartfailureminimization AT monicaoliveira computeraidedreengineeringtowardsplasticpartfailureminimization AT andreiacosta computeraidedreengineeringtowardsplasticpartfailureminimization
_version_	1718432024216207360

Computer-Aided Reengineering towards Plastic Part Failure Minimization

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