کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1558671 1513785 2016 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Fracture mechanics testing for environmental stress cracking in thermoplastics
ترجمه فارسی عنوان
آزمایش مکانیک شکستگی برای ترک خوردگی استرس محیطی در گرمانرم
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد شیمی مواد
چکیده انگلیسی

Under the combined influence of an aggressive environment and applied stress, engineering thermoplastics may undergo a phenomenon known as environmental stress cracking (ESC). This can result in adverse effects such as embrittlement and premature failure in service, due to the growth of environmentally-induced cracks to critical sizes, with little to no fluid absorption in the bulk material. Fracture mechanics is proposed as a suitable scheme to study and quantify ESC, with the aim being to obtain characterising data for different polymer-fluid combinations of interest, as well as to develop a reliable fracture mechanics test protocol. In the proposed method, slow crack growth is monitored to assess the effect of a range of applied crack driving forces (K, or alternatively G) on observed crack speeds, as opposed to simply measuring time-to-failure. This paper presents the results of experiments performed on the following materials: linear low density polyethylene (LLDPE) in Igepal solution and high impact polystyrene (HIPS) in sunflower oil. A discussion of the various issues surrounding the data analysis for these long-term tests is also included, as the attainment of consistent and repeatable results is critical for a method to be internationally standardised, which is a goal of the European Structural Integrity Society (ESIS) Technical Committee 4 from whose interest this work is drawn.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Procedia Structural Integrity - Volume 2, 2016, Pages 227–234
نویسندگان
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