کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7196073 | 1468305 | 2018 | 20 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of a micro-crack on the kinked macro-crack
ترجمه فارسی عنوان
اثر یک میکروکراک بر روی کراک کلر زده شده
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کلمات کلیدی
میکرو کرک، کلاهبرداری بزرگ فاکتور شدت تنش منطقه پلاستیکی،
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی مکانیک
چکیده انگلیسی
The solution of an infinite plane containing an arbitrarily located micro-crack and a kinked macro-crack is presented based on the distributed dislocation technique (DDT). The stress field, the plastic zone of the macro-crack tip (PZ) and the stress intensity factors at the macro-crack tip (SIFs) are obtained. The influence of the micro-crack on the kinked macro-crack is investigated. The results show the effect of the micro-crack on SIFs increases with the micro-crack length increasing, the distance d decreasing and the micro-crack angle decreasing. The micro-crack has an amplifying effect on mode I SIF at about -80°<θ<60°, while it has a shielding effect at about -90°<θ<-80° and 60°<θ<90°. The micro-crack has an amplifying effect on mode II SIF at about -90°<θ<20°, while it has a shielding effect at about 20°<θ<90°. The micro-crack ahead of PZ has a little amplifying effect on PZ. As the micro-crack is close to the macro-crack tip, plastic zones of the micro-crack tip and macro-crack tip will join together. PZ is split into two pieces by the micro-crack located in PZ. The micro-crack behind PZ has no effect on PZ. These results are helpful to analyze the fracture or fatigue behaviors of materials.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Theoretical and Applied Fracture Mechanics - Volume 96, August 2018, Pages 468-475
Journal: Theoretical and Applied Fracture Mechanics - Volume 96, August 2018, Pages 468-475
نویسندگان
Xiaotao Li, Hongda Yang, Xiaodong Zan, Xu Li, Xiaoyu Jiang,