Application of Digital Image Correlation Technique for the Damage Characteristic of Rock-like Specimens under Uniaxial Compression
The damage and degradation are the main influence factors of the instability of rock mass engineering. In this paper, the damage and deformation characteristics of the rock-like samples are investigated under the uniaxial compression test, and the advanced digital image correlation (DIC) device is d...
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2020/8857495 |
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| _version_ | 1832567798388228096 |
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| author | Jing Chai Yongliang Liu YiBo OuYang Dingding Zhang Wengang Du |
| author_facet | Jing Chai Yongliang Liu YiBo OuYang Dingding Zhang Wengang Du |
| author_sort | Jing Chai |
| collection | DOAJ |
| description | The damage and degradation are the main influence factors of the instability of rock mass engineering. In this paper, the damage and deformation characteristics of the rock-like samples are investigated under the uniaxial compression test, and the advanced digital image correlation (DIC) device is devoted to full-field deformation data acquisition on the sample surface. Based on the full-field deformation data, a new damage variable is proposed by the principal strain standard deviation to characterize the uniaxial compression damage process of the rock-like samples. The results show that the newly presented damage variable can be utilized for the quantitative characterization of the sample damage. According to the characteristics of the damage variable, the damage evolution process of the rock-like specimens under uniaxial compression can be divided into four stages: initial damage closure stage, linear elastic damage stage, elastic-plastic damage stage, and plastic damage stage. From the stress-strain curve, the cut-off point from elastic to plastic deformation of the rock-like specimen is also the turning point from micro to macro damage; after the point, the apparent initial damage starts to occur on the sample surface; furthermore, the damage of the specimen is accelerated in the plastic damage stage. When the overall damage variable reaches 0.5 or the damage variable of strain localization zone reaches 0.8, the macro crack forms, and the bearing capacity of the rock-like specimen decreases rapidly. The findings are of great significance to the prediction of the damage process of rock mass engineering by digital image correlation. |
| format | Article |
| id | doaj-art-6ab9d0b8a023493e8b1d2c5f075696ae |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-6ab9d0b8a023493e8b1d2c5f075696ae2025-02-03T01:00:27ZengWileyAdvances in Civil Engineering1687-80861687-80942020-01-01202010.1155/2020/88574958857495Application of Digital Image Correlation Technique for the Damage Characteristic of Rock-like Specimens under Uniaxial CompressionJing Chai0Yongliang Liu1YiBo OuYang2Dingding Zhang3Wengang Du4School of Energy, Xi’an University of Science and Technology, Xi’an, Shaanxi 710054, ChinaSchool of Energy, Xi’an University of Science and Technology, Xi’an, Shaanxi 710054, ChinaSchool of Energy, Xi’an University of Science and Technology, Xi’an, Shaanxi 710054, ChinaSchool of Energy, Xi’an University of Science and Technology, Xi’an, Shaanxi 710054, ChinaSchool of Energy, Xi’an University of Science and Technology, Xi’an, Shaanxi 710054, ChinaThe damage and degradation are the main influence factors of the instability of rock mass engineering. In this paper, the damage and deformation characteristics of the rock-like samples are investigated under the uniaxial compression test, and the advanced digital image correlation (DIC) device is devoted to full-field deformation data acquisition on the sample surface. Based on the full-field deformation data, a new damage variable is proposed by the principal strain standard deviation to characterize the uniaxial compression damage process of the rock-like samples. The results show that the newly presented damage variable can be utilized for the quantitative characterization of the sample damage. According to the characteristics of the damage variable, the damage evolution process of the rock-like specimens under uniaxial compression can be divided into four stages: initial damage closure stage, linear elastic damage stage, elastic-plastic damage stage, and plastic damage stage. From the stress-strain curve, the cut-off point from elastic to plastic deformation of the rock-like specimen is also the turning point from micro to macro damage; after the point, the apparent initial damage starts to occur on the sample surface; furthermore, the damage of the specimen is accelerated in the plastic damage stage. When the overall damage variable reaches 0.5 or the damage variable of strain localization zone reaches 0.8, the macro crack forms, and the bearing capacity of the rock-like specimen decreases rapidly. The findings are of great significance to the prediction of the damage process of rock mass engineering by digital image correlation.http://dx.doi.org/10.1155/2020/8857495 |
| spellingShingle | Jing Chai Yongliang Liu YiBo OuYang Dingding Zhang Wengang Du Application of Digital Image Correlation Technique for the Damage Characteristic of Rock-like Specimens under Uniaxial Compression Advances in Civil Engineering |
| title | Application of Digital Image Correlation Technique for the Damage Characteristic of Rock-like Specimens under Uniaxial Compression |
| title_full | Application of Digital Image Correlation Technique for the Damage Characteristic of Rock-like Specimens under Uniaxial Compression |
| title_fullStr | Application of Digital Image Correlation Technique for the Damage Characteristic of Rock-like Specimens under Uniaxial Compression |
| title_full_unstemmed | Application of Digital Image Correlation Technique for the Damage Characteristic of Rock-like Specimens under Uniaxial Compression |
| title_short | Application of Digital Image Correlation Technique for the Damage Characteristic of Rock-like Specimens under Uniaxial Compression |
| title_sort | application of digital image correlation technique for the damage characteristic of rock like specimens under uniaxial compression |
| url | http://dx.doi.org/10.1155/2020/8857495 |
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