کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5013953 | 1463052 | 2017 | 18 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Study of mixed-mode I/II fractures using single cleavage semicircle compression specimens under impacting loads
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی مکانیک
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
In order to study the fracture behavior of mixed-model I/II cracks under dynamic loads, a single cleavage semicircle compression (SCSC) specimen was proposed, and by using these specimens, rock dynamic fracture experiments for pure mode I and mixed-mode I/II under the impact of split Hopkinson pressure bar (SHPB) were conducted. Crack propagation speed was measured by using a crack propagation gauge (CPG) system and a high speed photography system, respectively. In order to confirm the experimental results, several numerical models for pure mode I and mixed mode I/II were established by using cumulative damage (CD) failure criterion, and by using these models, crack propagation behavior was simulated by using AUTODYN code. Generally, the results of crack propagation paths predicated by the numerical simulation agree well with the experimental results. This study shows that during crack propagation, the propagation speed is not a constant, and it may arrest for a moment. The new configuration specimen SCSC proposed in this paper is applicable in studying dynamic fractures by combining with SHPB device.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Engineering Fracture Mechanics - Volume 177, 15 May 2017, Pages 33-44
Journal: Engineering Fracture Mechanics - Volume 177, 15 May 2017, Pages 33-44
نویسندگان
Meng Wang, Zheming Zhu, Yuqing Dong, Lei Zhou,