Experimental Study on the Dynamic Behavior of Running Crack Affected by Defect Shape and Filling Material
Using the caustics method and the experimental system of digital laser dynamic caustics, the model experiment of drop hammer impact loading was carried out, and the effect of the defect shape (circular and rectangular) and the filling material (air, epoxy, and silicone rubber) on the propagation beh...
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2020/8495058 |
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| _version_ | 1850212650110156800 |
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| author | Zhen Lei Mingsheng Zhao |
| author_facet | Zhen Lei Mingsheng Zhao |
| author_sort | Zhen Lei |
| collection | DOAJ |
| description | Using the caustics method and the experimental system of digital laser dynamic caustics, the model experiment of drop hammer impact loading was carried out, and the effect of the defect shape (circular and rectangular) and the filling material (air, epoxy, and silicone rubber) on the propagation behavior of the running crack was investigated. The experimental results show that, under the impact loading, the running crack initiates at the end of precrack and propagates toward the defect. After the running crack connects to the defect, it accumulates energy within a certain period before initiating again at the upper edge of the defect. Subsequently, only one running crack is formed at the upper edge of the circular defect, but two running cracks are formed at the upper edge of the rectangular defect. The defect shape and the filling material have a significant effect not only on the energy accumulation time of the running crack at the defect but also on the stress intensity factor when initiating at the defect. The effect degree of the defect shape on the running crack propagation behavior is in the following order: circular defect > rectangular defect, whereas the effect degree of the filling material on the running crack propagation behavior follows this order: air > silicone rubber > epoxy. |
| format | Article |
| id | doaj-art-89f4539f6e3d4cf6bdacdb802c7c1657 |
| institution | OA Journals |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-89f4539f6e3d4cf6bdacdb802c7c16572025-08-20T02:09:18ZengWileyShock and Vibration1070-96221875-92032020-01-01202010.1155/2020/84950588495058Experimental Study on the Dynamic Behavior of Running Crack Affected by Defect Shape and Filling MaterialZhen Lei0Mingsheng Zhao1Institute of Mining Engineering, Guizhou Institute of Technology, Guizhou 550003, ChinaPoly Xinlian Blasting Engineering Group Co., Ltd., Guizhou 550026, ChinaUsing the caustics method and the experimental system of digital laser dynamic caustics, the model experiment of drop hammer impact loading was carried out, and the effect of the defect shape (circular and rectangular) and the filling material (air, epoxy, and silicone rubber) on the propagation behavior of the running crack was investigated. The experimental results show that, under the impact loading, the running crack initiates at the end of precrack and propagates toward the defect. After the running crack connects to the defect, it accumulates energy within a certain period before initiating again at the upper edge of the defect. Subsequently, only one running crack is formed at the upper edge of the circular defect, but two running cracks are formed at the upper edge of the rectangular defect. The defect shape and the filling material have a significant effect not only on the energy accumulation time of the running crack at the defect but also on the stress intensity factor when initiating at the defect. The effect degree of the defect shape on the running crack propagation behavior is in the following order: circular defect > rectangular defect, whereas the effect degree of the filling material on the running crack propagation behavior follows this order: air > silicone rubber > epoxy.http://dx.doi.org/10.1155/2020/8495058 |
| spellingShingle | Zhen Lei Mingsheng Zhao Experimental Study on the Dynamic Behavior of Running Crack Affected by Defect Shape and Filling Material Shock and Vibration |
| title | Experimental Study on the Dynamic Behavior of Running Crack Affected by Defect Shape and Filling Material |
| title_full | Experimental Study on the Dynamic Behavior of Running Crack Affected by Defect Shape and Filling Material |
| title_fullStr | Experimental Study on the Dynamic Behavior of Running Crack Affected by Defect Shape and Filling Material |
| title_full_unstemmed | Experimental Study on the Dynamic Behavior of Running Crack Affected by Defect Shape and Filling Material |
| title_short | Experimental Study on the Dynamic Behavior of Running Crack Affected by Defect Shape and Filling Material |
| title_sort | experimental study on the dynamic behavior of running crack affected by defect shape and filling material |
| url | http://dx.doi.org/10.1155/2020/8495058 |
| work_keys_str_mv | AT zhenlei experimentalstudyonthedynamicbehaviorofrunningcrackaffectedbydefectshapeandfillingmaterial AT mingshengzhao experimentalstudyonthedynamicbehaviorofrunningcrackaffectedbydefectshapeandfillingmaterial |