کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
774928 | 1463220 | 2011 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Simulation of local instabilities during crack propagation in the ductile–brittle transition region
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی مکانیک
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Simulation of local instabilities during crack propagation in the ductile–brittle transition region Simulation of local instabilities during crack propagation in the ductile–brittle transition region](/preview/png/774928.png)
چکیده انگلیسی
The crack propagation for a cohesive zone model within an elastic-plastic material under small-scale yielding conditions is simulated numerically. The resulting crack growth resistance curves show local instabilities, so-called pop-ins even for homogeneous cohesive properties if the cohesive strength lies sufficiently close to the maximum stress of the corresponding blunting solution. The formation of secondary cracks and unloading zones in front of the actual crack tip is identified as the underlying mechanism. It is found that the shape of the cohesive law has a considerable influence on the crack arrest behavior. Furthermore, requirements to the mesh resolution are derived.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: European Journal of Mechanics - A/Solids - Volume 30, Issue 3, May–June 2011, Pages 195–203
Journal: European Journal of Mechanics - A/Solids - Volume 30, Issue 3, May–June 2011, Pages 195–203
نویسندگان
Geralf Hütter, Uwe Mühlich, Meinhard Kuna,