کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
777165 1463844 2007 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Constant-life diagram modified for notch plasticity
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
Constant-life diagram modified for notch plasticity
چکیده انگلیسی

A modified constant-life Haigh diagram has been formulated to account for plasticity occurring at stress concentrations under cyclic loading at sufficiently high stress ratios. The notch plasticity is assumed to occur within a range of elastic stress concentration factors, kt, and cycles to failure, Nf, such that plastic straining occurs only during the first cycle of constant-amplitude cycling and straining remains elastic thereafter. This condition is expected to occur in high cycle fatigue at stress concentrations of moderate kt loaded at high stress ratio. The validity of the model is assessed by means of fatigue data from Ti–6Al–4V notched specimens having a range of kt. The model, purposely kept simple for ease of use as a design tool, is found to capture trends in the fatigue data not predicted using traditional straight-line models on a mean stress versus alternating stress constant-life plot.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Fatigue - Volume 29, Issue 12, December 2007, Pages 2163–2169
نویسندگان
, ,