Environmental Stress Cracking (ESC) is a phenomenon that can cause pipes and fittings to fail, often causing extensive water damage to residential homes and commercial businesses. Premature failure was observed in a bathroom sink faucet that had been in service for approximately one month. The failure involved the fracture of a plastic coupling nut molded from a Polyethylene Ether-Polystyrene (PPE-PS) material. The objective of this investigation was to determine the nature and cause of the failure. The mechanism and type of failure have been deduced from a morphological examination of the fracture surface via Scanning Electron Microscopy (SEM), material analysis via Fourier-Transform Infrared Spectroscopy (FT-IR), Finite Element Analysis (FEA), and analytical testing. The results of the analysis indicated that the failure mode was caused by ESC, due to the presence of an incompatible chemical and mechanical stress that caused localized stress and crack initiation.
|Commitee:||Shabeer, Ahamed, Torabzadeh, Jalal|
|School:||California State University, Long Beach|
|Department:||Mechanical and Aerospace Engineering|
|School Location:||United States -- California|
|Source:||MAI 58/01M(E), Masters Abstracts International|
|Keywords:||Environmental stress cracking, Failure analysis, Fourier-transform infrared spectroscopy, Polyphenylene ether, Polystyrene, Scanning electron microscopy|
Copyright in each Dissertation and Thesis is retained by the author. All Rights Reserved
The supplemental file or files you are about to download were provided to ProQuest by the author as part of a
dissertation or thesis. The supplemental files are provided "AS IS" without warranty. ProQuest is not responsible for the
content, format or impact on the supplemental file(s) on our system. in some cases, the file type may be unknown or
may be a .exe file. We recommend caution as you open such files.
Copyright of the original materials contained in the supplemental file is retained by the author and your access to the
supplemental files is subject to the ProQuest Terms and Conditions of use.
Depending on the size of the file(s) you are downloading, the system may take some time to download them. Please be