کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7221118 1470345 2013 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of tensile overloads on fatigue crack growth of high strength steel wires
ترجمه فارسی عنوان
تأثیر بارهای کششی بر روی رشد ترک خستگی سیمهای فولادی با مقاومت بالا
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی (عمومی)
چکیده انگلیسی
Fatigue of the tensile armor wires is the main failure mode of flexible risers. Techniques to increase the life of these components are required to improve the processes safety on oil exploration. This work evaluates the crack growth retardation of high strength steel wires used in flexible pipelines. Fracture toughness tests were performed to establish the level of stress intensity factor wherein the wires present significant plastic deformation at the crack tip. The effect of tensile overload on fatigue behavior was assessed by fatigue crack growth testing under constant ΔK control and different overload ratios with two different load ratios. The outcomes show that the application of controlled overloads provides crack retardation and increases the fatigue life of the wires more than 31%. This behavior is also evident at stress ratio of 0.5, in spite of the crack closure effect being minimized by increasing the applied mean stress.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials & Design (1980-2015) - Volume 52, December 2013, Pages 190-195
نویسندگان
, , ,