| 相干梯度敏感(CGS)干涉测量技术及其应用研究 |
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| 引用本文： | 姚学锋,许蔚,刘栋梁,金观昌.相干梯度敏感(CGS)干涉测量技术及其应用研究[J].实验力学,2006,21(5):559-566. |
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| 作者姓名： | 姚学锋 许蔚 刘栋梁 金观昌 |
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| 作者单位： | 清华大学,航天航空学院工程力学系,FML,北京,100084 |
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| 基金项目： | 国家自然科学基金(项目:10372048)，清华大学校基础基金，北京市科技计划项目，国家教委留学回国人员启动基金 |
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| 摘 要： | 首先介绍了相干梯度敏感(CGS:Coherent Gradient Sensing)光学干涉测量技术的最新研究进展;其次,详细介绍了透射CGS方法和反射CGS方法的基本原理及实验技术;最后给出了CGS技术在各种断裂力学研究中的应用,不仅给出了各向同性均匀聚合物材料I型、混合型、V型裂纹及梯度材料I型裂纹尖端奇异场的控制方程,而且给出了对应各自情况下的CGS光学条纹模拟与实验图像。研究结果将为实验断裂力学研究提供基础性理论和实验应力分析手段。
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| 关 键 词： | 相干梯度敏感干涉技术 断裂力学 条纹模式 应力强度因子 |
| 文章编号： | 1001-4888(2006)05-0559-08 |
| 收稿时间： | 2005-08-24 |
| 修稿时间： | 2006-08-29 |
Coherent Gradient Sensing Interferometry Technology and Its Application |
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| YAO Xue-feng,XU Wei,LIU Dong-liang,JIN Guan-chang.Coherent Gradient Sensing Interferometry Technology and Its Application[J].Journal of Experimental Mechanics,2006,21(5):559-566. |
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| Authors: | YAO Xue-feng XU Wei LIU Dong-liang JIN Guan-chang |
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| Institution: | Department of Engineering Mechanics, School of Aerospace, Tsinghua University, Beijing 100084, China |
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| Abstract: | In this paper,the newest research progresses about CGS optical technology are firstly reviewed.Then the basic principle and measurement technology of CGS in transmission and in reflection are introduced,respectively.Finally the applications of CGS method to fracture mechanics are presented in detail,which not only include the optical control equations of variety of crack tip stress singularities for mode I crack,mixed mode crack,V-notch in isotropic material and gradient material,but also show the corresponding simulated and experimental CGS fringe images.The CGS governing equation represents the optics-mechanics relation of the singular yield at crack tip.These results will play an important role in theoretical research and experimental stress technology for fracture mechanics. |
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| Keywords: | coherent gradient sensing fracture fringe stress intensity factor |
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