کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5013932 1463050 2017 19 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Generalized definition of “crack-like” notches to finite life and SN curve transition from “crack-like” to “blunt notch” behavior
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
Generalized definition of “crack-like” notches to finite life and SN curve transition from “crack-like” to “blunt notch” behavior
چکیده انگلیسی
We start by generalizing the concept of “crack-like” notches to finite life. We note that, according to the well established Critical Distance Method (originally proposed by Neuber and Peterson), SN curves of all notches are very close to SN curves for cracked specimen, up to a certain number of cycles N∗, above which they tend to the SN curve of the uncracked/unnotched (plain) specimen, reduced by the stress concentration factor Kt. We suggest therefore new simple estimates for rapid assessment of the notch effect under finite life: for the “crack-like” notch, substituting the notch with a crack leads to immediate use of crack solutions in databases, whereas the knowledge of the stress ahead of a notch is also well known analytically in many cases, or can be adapted. We show one example with the SAE keyhole tests, leading to fully analytical SN curves, in much better agreement with experiment than, for example, strain-life approaches using Neuber's rule.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Engineering Fracture Mechanics - Volume 179, 15 June 2017, Pages 154-164
نویسندگان
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