| 基于数字散斑相关方法的虚拟引伸计及其在岩石裂纹动态观测中的应用 |
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| 引用本文： | 郭文婧,马少鹏,康永军,马沁巍.基于数字散斑相关方法的虚拟引伸计及其在岩石裂纹动态观测中的应用[J].岩土力学,2011,32(10):3196-3200. |
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| 作者姓名： | 郭文婧 马少鹏 康永军 马沁巍 |
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| 作者单位： | 1.北京理工大学 宇航学院力学系，北京 100081；2.北京强度环境研究所，北京 100076； 3.中国地震局地质研究所 地震动力学国家重点实验室，北京 100029 |
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| 基金项目： | 国家自然科学基金项目资助(No.10972038); 地震动力学国家重点实验室开放基金项目资助(No.LED08-12) |
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| 摘 要： | 基于数字散斑相关方法（DSCM）发展了一种虚拟引伸计测量方法。该方法通过DSCM测量的应变场识别和定位裂纹，然后“事后”在裂纹处虚拟地安装引伸计，再通过DSCM测量的位移场计算裂纹的张开量和错动量。给出了虚拟引伸计的原理和实现方法，并用实验验证了虚拟引伸计的可靠性，同时分析并标定出虚拟引伸计在实测中可达到0.1像素的分辨率。将虚拟引伸计应用于含未穿透预制裂纹（三维裂纹）的花岗岩试件的破坏实验中，根据虚拟引伸计测得的裂纹张开、错动情况，对试件破坏过程中不同裂纹的出现顺序以及裂纹类型进行了判断，同时对试件破坏的机制进行了简单分析。
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| 关 键 词： | 虚拟引伸计 数字散斑相关方法（DSCM） 裂纹 岩石破坏 |
| 收稿时间： | 2010-03-01 |
Virtual extensometer based on digital speckle correlation method and its application to deformation field evolution of rock specimen |
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| GUO Wen-jing,MA Shao-peng,KANG Yong-jun,MA Qin-wei.Virtual extensometer based on digital speckle correlation method and its application to deformation field evolution of rock specimen[J].Rock and Soil Mechanics,2011,32(10):3196-3200. |
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| Authors: | GUO Wen-jing MA Shao-peng KANG Yong-jun MA Qin-wei |
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| Affiliation: | 1. Department of Mechanics, School of Aerospace Engineering, Beijing Institute of Technology, Beijing 100081, China; 2. Beijing Institute of Strength and Environment Engineering, Beijing 100076, China; 3. State Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake Administration, Beijing 100029, China |
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| Abstract: | The virtual extensometer is developed based on digital speckle correlation method(DSCM).To realize the virtual extensometer,the cracks on the specimen are firstly identified and located using the strain fields measured by DSCM.Then,virtual extensometers are installed on the cracks.Finally,the opening and the dislocation of the cracks are calculated through the displacement fields.The principle and realization of the virtual extensometer are introduced.The reliability of virtual extensometer is verified by a... |
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| Keywords: | virtual extensometer digital speckle correlation method(DSCM) crack rock failure |
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