Constitutive behavior of a polypropylene grade used in offshore gravity pipe
نام عام مواد
[Thesis]
نام نخستين پديدآور
Danar Tri Yurindatama
نام ساير پديدآوران
Barsoum, Imad
وضعیت نشر و پخش و غیره
نام ناشر، پخش کننده و غيره
The Petroleum Institute (United Arab Emirates)
تاریخ نشرو بخش و غیره
2016
مشخصات ظاهری
نام خاص و کميت اثر
163
يادداشت کلی
متن يادداشت
Committee members: Ahmad, Jamal; Gunister, Ebru
یادداشتهای مربوط به نشر، بخش و غیره
متن يادداشت
Place of publication: United States, Ann Arbor; ISBN=978-1-369-37464-3
یادداشتهای مربوط به پایان نامه ها
جزئيات پايان نامه و نوع درجه آن
M.S.
نظم درجات
Mechanical Engineering
کسي که مدرک را اعطا کرده
The Petroleum Institute (United Arab Emirates)
امتياز متن
2016
یادداشتهای مربوط به خلاصه یا چکیده
متن يادداشت
BorECO™ BA212E is a polypropylene block co-polymer which has become a common material in the manufacturing of large diameter non-pressurized gravity offshore intake pipelines. These lines are used for transportation of sea water for cooling of petrochemical process plants where the pipe sections are joined by butt heat fusion welding to create the pipeline. Recently a few premature failures of such pipelines have been reported in the field. Hence, there is a need to characterize the constitutive behavior of the pipe and weld material in order to properly design these pipes. The aim of this thesis is to determine the material constitutive behaviors of the pipe material and the welded joint material. Uniaxial tensile tests of both the pipe and weld joint material are conducted at various strain rates. Both the pipe and weld material show a rather high strain rate dependence, with the weld material having about 2 times lower yield strength than the pipe material. An analytical constitutive material model is developed for both the pipe and weld material, incorporating the effect of strain rate. The failure locus, expressed in terms of the equivalent plastic strain at failure vs. the stress triaxiality, for both materials is also determined as part of the constitutive model using notched dumbbell specimens. The failure loci also show a rather high strain rate dependence. The developed constitutive model and failure loci for the pipe and weld material are implemented in a finite element model (FEM) and are validated by conducting a series of independent four-point bend experiments on both material types. The validation is carried out by comparing the FEM results of the four-point bend model with the experimental results, which show a rather good agreement.
موضوع (اسم عام یاعبارت اسمی عام)
موضوع مستند نشده
Mechanical engineering
اصطلاحهای موضوعی کنترل نشده
اصطلاح موضوعی
Applied sciences;Failure locus;Polypropylene;Weld joint constitutive model
نام شخص به منزله سر شناسه - (مسئولیت معنوی درجه اول )