کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
787828 1466085 2013 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Ratcheting failure of pressurised straight pipes and elbows under reversed bending
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
Ratcheting failure of pressurised straight pipes and elbows under reversed bending
چکیده انگلیسی


• Studies were carried out under combined internal pressure and cyclic bending.
• Ratcheting strains were measured at critical locations of the specimens.
• Quantified the percentage of ballooning, ovalization and reduction in thickness.
• Modes of ratcheting failure of straight pipes and elbows are studied.
• Inferred that ratcheting is more pronounced in straight pipes than in elbows.

Ratcheting studies were carried out on Type 304LN stainless steel straight pipes and elbows subjected to steady internal pressure and cyclic bending load. The internal pressure for all the straight pipes was 35 MPa and in the case of elbows the internal pressure was varied for different elbows, ranging from 27.6 MPa to 39.2 MPa. Cyclic bending load was applied on the specimens by subjecting them to different levels of load-line displacement. The specimens have undergone significant ratchet swelling (ballooning), ovalization and consequent thinning of the cross-section during ratcheting. The straight pipes failed either by occurrence of through-wall crack accompanied by simultaneous ballooning, or bursting with simultaneous ballooning. All the elbows failed by occurrence of through-wall crack accompanied by simultaneous ballooning. Ratcheting behaviour of straight pipes and elbows were compared and it was generally inferred that ratcheting was more pronounced in straight pipes than in elbows.

Strain history for the specimen QCE-RAT-6-L1.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Pressure Vessels and Piping - Volumes 105–106, May–June 2013, Pages 79–89
نویسندگان
, , , , , , , ,