کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
788372 1466065 2015 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Comparison of R6 and A16 J estimation methods under combined mechanical and thermal loads with FE results
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
Comparison of R6 and A16 J estimation methods under combined mechanical and thermal loads with FE results
چکیده انگلیسی


• Accuracy of existing J estimation methods for combined mechanical and thermal loading are compared with FE results.
• The methods in the UK R6 and the French A16 procedures are considered.
• The R6 estimates are overall accurate but can be non-conservative at large Lr.
• The A16 estimates are more conservative than the R6 estimates at small Lr but are conservative even at large Lr.
• Possible sources of conservatism and non-conservatism in R6 and A16 are discussed.

This paper compares elastic–plastic values of J calculated using the methods in the UK R6 and the French A16 fitness-for-service procedures with FE results for a vessel with a circumferential surface crack under axial tension and a radial thermal gradient. In the FE analyses, the relative magnitudes and loading sequence of mechanical and thermal loads are systematically varied, together with the material strain hardening exponent. Fully circumferential and semi-elliptical surface crack with two relative crack depths are considered. It is found that the R6 estimates are overall accurate but can be non-conservative at large Lr. The A16 estimates are more conservative than the R6 estimates at small Lr but are conservative even at large Lr. Possible sources of conservatism and non-conservatism in R6 and A16 are discussed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Pressure Vessels and Piping - Volumes 135–136, November–December 2015, Pages 12–25
نویسندگان
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