Experimental investigation on dynamic fracture toughness of offset crack material using caustic method
The dynamic fracture behavior of notched semi-circular bending(NSCB) subjected to hammer impact loading was studied by using caustics experimental method.The results show that the shear stress at the crack tip increased with the offset distance increased, and correspondingly, the crack changed from...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Emergency Management Press
2017-06-01
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| Series: | 矿业科学学报 |
| Subjects: | |
| Online Access: | http://kykxxb.cumtb.edu.cn/article/id/69 |
| _version_ | 1797987252452720640 |
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| author | Li Qing Cao Huaijian Yang Mingze Guo Yang Xue Yaodong Yu Qiang |
| author_facet | Li Qing Cao Huaijian Yang Mingze Guo Yang Xue Yaodong Yu Qiang |
| author_sort | Li Qing |
| collection | DOAJ |
| description | The dynamic fracture behavior of notched semi-circular bending(NSCB) subjected to hammer impact loading was studied by using caustics experimental method.The results show that the shear stress at the crack tip increased with the offset distance increased, and correspondingly, the crack changed from mode I to mixed mode I-II, the time from impact force loaded to crack initiation also increased, moreover, the crack deflecting angle became more fluctuating with crack propagation;the crack velocity increased rapidly under dynamic load until it reached a certain value with continual fluctuation, with the ratio of crack vertical displacement to the total vertical length<i>λ</i>> 0.8, the crack velocity sharply decreased because of the effect of the local compressive stress around the hammer;as the offset distance increased, the initial fracture toughness <i>K</i><sub>IC</sub> decreased, whereas <i>K</i><sub>IIC</sub> increased;while the dynamic propagation toughness increased gradually with crack propagation. |
| first_indexed | 2024-04-11T07:44:53Z |
| format | Article |
| id | doaj.art-2c3ba9a416064dd4b1a2f7f065a408eb |
| institution | Directory Open Access Journal |
| issn | 2096-2193 |
| language | English |
| last_indexed | 2024-04-11T07:44:53Z |
| publishDate | 2017-06-01 |
| publisher | Emergency Management Press |
| record_format | Article |
| series | 矿业科学学报 |
| spelling | doaj.art-2c3ba9a416064dd4b1a2f7f065a408eb2022-12-22T04:36:20ZengEmergency Management Press矿业科学学报2096-21932017-06-0123243250Experimental investigation on dynamic fracture toughness of offset crack material using caustic methodLi Qing0Cao Huaijian1Yang Mingze2Guo Yang3Xue Yaodong4Yu Qiang5School of Mechanics and Civil Engineering, China University of Mining and Technology, Beijing 100083, ChinaSchool of Mechanics and Civil Engineering, China University of Mining and Technology, Beijing 100083, ChinaSchool of Mechanics and Civil Engineering, China University of Mining and Technology, Beijing 100083, ChinaSchool of Mechanics and Civil Engineering, China University of Mining and Technology, Beijing 100083, ChinaSchool of Mechanics and Civil Engineering, China University of Mining and Technology, Beijing 100083, ChinaSchool of Mechanics and Civil Engineering, China University of Mining and Technology, Beijing 100083, ChinaThe dynamic fracture behavior of notched semi-circular bending(NSCB) subjected to hammer impact loading was studied by using caustics experimental method.The results show that the shear stress at the crack tip increased with the offset distance increased, and correspondingly, the crack changed from mode I to mixed mode I-II, the time from impact force loaded to crack initiation also increased, moreover, the crack deflecting angle became more fluctuating with crack propagation;the crack velocity increased rapidly under dynamic load until it reached a certain value with continual fluctuation, with the ratio of crack vertical displacement to the total vertical length<i>λ</i>> 0.8, the crack velocity sharply decreased because of the effect of the local compressive stress around the hammer;as the offset distance increased, the initial fracture toughness <i>K</i><sub>IC</sub> decreased, whereas <i>K</i><sub>IIC</sub> increased;while the dynamic propagation toughness increased gradually with crack propagation.http://kykxxb.cumtb.edu.cn/article/id/69offset cracksemi-circular specimencaustics methodstress intensity factorcrack velocity |
| spellingShingle | Li Qing Cao Huaijian Yang Mingze Guo Yang Xue Yaodong Yu Qiang Experimental investigation on dynamic fracture toughness of offset crack material using caustic method 矿业科学学报 offset crack semi-circular specimen caustics method stress intensity factor crack velocity |
| title | Experimental investigation on dynamic fracture toughness of offset crack material using caustic method |
| title_full | Experimental investigation on dynamic fracture toughness of offset crack material using caustic method |
| title_fullStr | Experimental investigation on dynamic fracture toughness of offset crack material using caustic method |
| title_full_unstemmed | Experimental investigation on dynamic fracture toughness of offset crack material using caustic method |
| title_short | Experimental investigation on dynamic fracture toughness of offset crack material using caustic method |
| title_sort | experimental investigation on dynamic fracture toughness of offset crack material using caustic method |
| topic | offset crack semi-circular specimen caustics method stress intensity factor crack velocity |
| url | http://kykxxb.cumtb.edu.cn/article/id/69 |
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