کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5015260 | 1463728 | 2017 | 28 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
On the physical interpretation of the R-ratio effect and the LEFM parameters used for fatigue crack growth in adhesive bonds
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موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی مکانیک
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: On the physical interpretation of the R-ratio effect and the LEFM parameters used for fatigue crack growth in adhesive bonds On the physical interpretation of the R-ratio effect and the LEFM parameters used for fatigue crack growth in adhesive bonds](/preview/png/5015260.png)
چکیده انگلیسی
The available models for the prediction of fatigue crack growth in adhesive bonds rely on the similitude principle. In most cases, one of three similitude parameters based on the strain energy release rate (SERR) is used; i.e. Gmax,(ÎG)2, or ÎG. In all cases it is usually observed that keeping the similitude parameter constant, and changing the R-ratio, results in a different crack growth rate. In this paper it is shown that this apparent 'R-ratio' effect is caused because the selected similitude parameter does not define a unique load cycle; a single value of the similitude parameter could correspond to infinitely many load cycles. The strain energy dissipation approach is used to show that the resistance to fatigue crack growth is related to the maximum applied load. The amount of energy available for crack growth is shown to be related to the applied cyclic work. With these relationships the R-ratio effects reported in literature can be qualitatively explained, purely in terms of the actual applied load cycle. Although it is possible that the material behaviour also depends on the R-ratio, the magnitude of these effects can only properly be determined if the applied load cycle is correctly described first.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Fatigue - Volume 97, April 2017, Pages 162-176
Journal: International Journal of Fatigue - Volume 97, April 2017, Pages 162-176
نویسندگان
J.A. Pascoe, R.C. Alderliesten, R. Benedictus,