کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7168651 | 1463030 | 2018 | 21 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A non-local approach for probabilistic assessment of LCF life based on optimized effective-damage-parameter
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی مکانیک
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The present paper includes two parts of low cycle fatigue (LCF) life analysis using the weakest-link method and a novel non-local approach respectively, which are both conducted based on previously published fatigue test results of TA19 notched specimens. The weakest-link method is applied to the prediction of strain fatigue life by introducing the Smith-Watson-Topper (SWT) parameter. The accuracy of the weakest-link method is found to be highly dependent on the values of Weibull parameters. The life scatter factor and the percentage for the data out of ±3Ï scatter, which are introduced to evaluate the accuracy of deterministic and probabilistic life prediction respectively, have opposite tendency with the value of shape parameter for Weibull function. Accordingly, a non-local approach is proposed based on optimized effective-damage-parameter (OEDP). The optimization procedure for the effective damage parameter is established to ensure an optimum life scatter factor. Meanwhile, a probabilistic SWT model based on linear regression is developed to describe the dispersion of fatigue life. It is shown that a satisfactory accuracy of LCF life estimation can be achieved using the proposed method.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Engineering Fracture Mechanics - Volume 199, August 2018, Pages 188-200
Journal: Engineering Fracture Mechanics - Volume 199, August 2018, Pages 188-200
نویسندگان
Da Li, Dianyin Hu, Rongqiao Wang, Qihang Ma, Hui Liu,