The effects of water and frequency on fatigue crack growth rate in modified and unmodified Polyvinyl Chloride

A study of the influence of water environments on the cyclic fatigue crack behavior of polyvinyl chloride (PVC), with (PVC-M) and without (PVC-U) chlorinated polyethylene (CPE) impact modifier was undertaken and compared with corresponding results in air. Two frequencies of 1 and 7 Hz were applied t...

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Main Authors:	Samat, Noorasikin, Burford, Robert, Whittle, Alan, Hoffman, Mark
Format:	Article
Language:	English
Published:	Wiley 2010
Subjects:	TP1080 Polymers, plastics and their manufacture
Online Access:	http://irep.iium.edu.my/2843/ http://irep.iium.edu.my/2843/ http://irep.iium.edu.my/2843/ http://irep.iium.edu.my/2843/1/fatigue-water.pdf

id	iium-2843
recordtype	eprints
spelling	iium-28432017-08-25T05:56:53Z http://irep.iium.edu.my/2843/ The effects of water and frequency on fatigue crack growth rate in modified and unmodified Polyvinyl Chloride Samat, Noorasikin Burford, Robert Whittle, Alan Hoffman, Mark TP1080 Polymers, plastics and their manufacture A study of the influence of water environments on the cyclic fatigue crack behavior of polyvinyl chloride (PVC), with (PVC-M) and without (PVC-U) chlorinated polyethylene (CPE) impact modifier was undertaken and compared with corresponding results in air. Two frequencies of 1 and 7 Hz were applied to assess the influence of frequency on the fatigue behavior; a higher fatigue resistance and threshold were obtained with increasing frequency. This trend is more significant in water. However, in this environment, the fatigue resistance deteriorated under conditions of higher stress intensity factor amplitude (ΔK) and frequency. The fatigue properties of PVC-U are the most affected by the presence of water, particularly at low frequency and higher ΔK. Examination of the fracture surface showed the interaction of water molecules and the PVC matrix with the formation of (1) a nodular structure, close to the fatigue threshold and (2) plasticized structures at high ΔK, which are associated with a greater threshold value and fatigue resistance. The absorption of the water retarded the fibrillation of craze and caused crack blunting effects. Water functions as a plasticizer, particularly at high ΔK, through the formation of the plasticized structures. Results are compared with those observed from an in-service failure Wiley 2010-02 Article PeerReviewed application/pdf en http://irep.iium.edu.my/2843/1/fatigue-water.pdf Samat, Noorasikin and Burford, Robert and Whittle, Alan and Hoffman, Mark (2010) The effects of water and frequency on fatigue crack growth rate in modified and unmodified Polyvinyl Chloride. Polymer Engineering and Science, 50 (2). pp. 352-364. ISSN 1548-2634 http://onlinelibrary.wiley.com/doi/10.1002/pen.21547/full 10.1002/pen.21547
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English
topic	TP1080 Polymers, plastics and their manufacture
spellingShingle	TP1080 Polymers, plastics and their manufacture Samat, Noorasikin Burford, Robert Whittle, Alan Hoffman, Mark The effects of water and frequency on fatigue crack growth rate in modified and unmodified Polyvinyl Chloride
description	A study of the influence of water environments on the cyclic fatigue crack behavior of polyvinyl chloride (PVC), with (PVC-M) and without (PVC-U) chlorinated polyethylene (CPE) impact modifier was undertaken and compared with corresponding results in air. Two frequencies of 1 and 7 Hz were applied to assess the influence of frequency on the fatigue behavior; a higher fatigue resistance and threshold were obtained with increasing frequency. This trend is more significant in water. However, in this environment, the fatigue resistance deteriorated under conditions of higher stress intensity factor amplitude (ΔK) and frequency. The fatigue properties of PVC-U are the most affected by the presence of water, particularly at low frequency and higher ΔK. Examination of the fracture surface showed the interaction of water molecules and the PVC matrix with the formation of (1) a nodular structure, close to the fatigue threshold and (2) plasticized structures at high ΔK, which are associated with a greater threshold value and fatigue resistance. The absorption of the water retarded the fibrillation of craze and caused crack blunting effects. Water functions as a plasticizer, particularly at high ΔK, through the formation of the plasticized structures. Results are compared with those observed from an in-service failure
format	Article
author	Samat, Noorasikin Burford, Robert Whittle, Alan Hoffman, Mark
author_facet	Samat, Noorasikin Burford, Robert Whittle, Alan Hoffman, Mark
author_sort	Samat, Noorasikin
title	The effects of water and frequency on fatigue crack growth rate in modified and unmodified Polyvinyl Chloride
title_short	The effects of water and frequency on fatigue crack growth rate in modified and unmodified Polyvinyl Chloride
title_full	The effects of water and frequency on fatigue crack growth rate in modified and unmodified Polyvinyl Chloride
title_fullStr	The effects of water and frequency on fatigue crack growth rate in modified and unmodified Polyvinyl Chloride
title_full_unstemmed	The effects of water and frequency on fatigue crack growth rate in modified and unmodified Polyvinyl Chloride
title_sort	effects of water and frequency on fatigue crack growth rate in modified and unmodified polyvinyl chloride
publisher	Wiley
publishDate	2010
url	http://irep.iium.edu.my/2843/ http://irep.iium.edu.my/2843/ http://irep.iium.edu.my/2843/ http://irep.iium.edu.my/2843/1/fatigue-water.pdf
first_indexed	2023-09-18T20:10:30Z
last_indexed	2023-09-18T20:10:30Z
_version_	1777407445434368000

The effects of water and frequency on fatigue crack growth rate in modified and unmodified Polyvinyl Chloride

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