数字散斑相关方法测定岩石I型应力强度因子

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (583 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要提出一种通过数字散斑相关方法测定岩石I型裂纹尖端位置和应力强度因子的试验方法。采用数字散斑相关方法观测三点弯曲加载条件下，含I型预制裂纹的花岗岩半圆盘试件裂尖区域的位移场，采用牛顿–辛普森方法求解含未知参量的非线性位移场方程组，计算裂尖位置和应力强度因子。研究结果表明，采用该方法可以准确测定岩石I型应力强度因子、裂尖位置及裂纹扩展长度，揭示岩石断裂及裂纹扩展的演化特征。该方法解决以往研究中因不能准确测定裂纹尖端位置，而无法计算岩石断裂参数的难题。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章

关键词 ：岩石力学, 数字散斑相关方法, 岩石断裂, I型应力强度因子, 裂纹扩展长度

Abstract：An automatic method for determining mode I stress intensity factors(SIFs) and crack tip positions of rock specimens from displacement fields obtained by digital speckle correlation method(DSCM) is proposed. Notched semicircular disk granite specimen under three-point bending are employed for determining the mode I SIFs and the displacement fields around crack tip which are measured by DSCM. Nonlinear displacement field equations with unknown parameters are solved by Newton-Simpson method. The research results show that mode I SIFs，crack tip positions and crack propagation length can be determined accurately from the components of displacement fields；and the characters of rock fracture and crack propagation are revealed. The present method settled the problem of determining stress intensity factors and crack tip position simultaneously in rock fracture testing；so the fracture parameters of rock can be calculated.

Key words： rock mechanics digital speckle correlation method(DSCM) rock fracture mode I stress intensity factor crack extension length

收稿日期: 2012-07-02

引用本文:

代树红1，2，马胜利1，潘一山2，董子贤2. 数字散斑相关方法测定岩石I型应力强度因子[J]. 岩石力学与工程学报, 2012, 31(12): 2501-2507.
DAI Shuhong1，2，MA Shengli1，PAN Yishan2，DONG Zixian2. EVALUATION OF MODE I STRESS INTENSITY FACTOR OF ROCK UTILIZING DIGITAL SPECKLE CORRELATION METHOD. , 2012, 31(12): 2501-2507.

链接本文:

http://www.rockmech.org/CN/Y2012/V31/I12/2501

[5]	王新华，尹祥础，滕春凯. 用断裂力学的方法研究地震断裂的扩展方式[J]. 地球物理学报，1984，27(3)：258-267.(WANG Xinhua， YIN Xiangchu，TENG Chunkai. Study of spreading mode of earthquake rupture using fracture mechanics[J]. Acta Geophsica Sinica，1984，27(3)：258-267.(in Chinese))
[9]	CHIANG F. Moire? and speckle methods applied to elastic-plastic fracture studies[C]// Experimental Techniques in Fracture. New York：Wiley-VCH，1993：291-325. " target="_blank">
[12]	马少鹏，金观昌，潘一山. 岩石材料基于天然散斑场的变形观测方法研究[J]. 岩石力学与工程学报，2002，21(6)：792-796.(MA Shaopeng，JIN Guanchang，PAN Yishan. Deformation measurement method for rock materials based on natural speckle pattern[J]. Chinese Journal of Rock Mechanics and Engineering，2002，21(6)：792-796. (in Chinese))
[13]	MA S P，XU X H，ZHAO Y H. The Geo-DSCM system and its application to the deformation measurement of rock materials[J]. International Journal of Rock Mechanics and Mining Sciences，2004，41(3)：411-412.
[15]	LOPEZ-CRESPO P，SHTERENLIKHT A，PATTERSON E A，et al. The stress intensity of mixed mode cracks determined by digital image correlation[J]. The Journal of Strain Analysis for Engineering Design，2008，43(8)：769-780. " target="_blank">
[17]	PETERS W H，RANSON W F. Digital image techniques in experimental mechanics[J]. Optical Engineering，1982，21(3)：427-431. " target="_blank">
[20]	LIM I L，JOHNSTON I W，CHOI S K，et al. Fracture testing of a soft rock with semicircular specimens under three point bending. Part 1—mode I[J]. International Journal of Rock Mechanics and Mining Sciences，1994，31(3)：185-197. " target="_blank">
[23]	ATLURI S N，KOBAYASHI A S. Mechanical responses of materials[C]// Handbook on Experimental Mechanics. New York：Wiley-VCH，1993：1-37. " target="_blank">
[3]	高文蛟，单仁亮，朱永，等. 用短棒试件测试无烟煤准静态断裂韧度试验研究[J]. 岩石力学与工程学报，2006，25(增2)：3 919-3 926. (GAO Wenjiao，SHAN Renliang，ZHU Yong，et al. Determining quasi-static fracture toughness of anthracite using short rod specimen[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(Supp.2)：3 919-3 926.(in Chinese))
[6]	贾学明，王启智. 标定ISRM岩石断裂韧度新型试样CCNBD的应力强度因子[J]. 岩石力学与工程学报，2003，22(8)：1 227-1 233. (JIA Xueming，WANG Qizhi. Calibration of stress intensity factor for new type of fracture toughness specimen(cracked chevron notched Brazilian disc(CCNBD) suggested by ISRM[J]. Chinese Journal of Rock Mechanics and Engineering，2003，22(8)：1 227-1 233.(in Chinese))
[7]	张盛，王启智. 用5种圆盘试件的劈裂试验确定岩石断裂韧度[J]. 岩土力学，2009，30(1)：12-18.(ZHANG Sheng，WANG Qizhi. Determination of rock fracture toughness by split test using five types of disc specimens[J]. Rock and Soil Mechanics，2009，30(1)：12-18.(in Chinese))
[10]	SANFORD R J. Determining fracture parameters with full-field optical methods[J]. Experimental Mechanics，1989，29(3)：241-247. " target="_blank">
[18]	YAMAGUCHI I. A laser-speckle strain gauge[J]. Journal of Physics：E，1981，14(11)：1 270-1 273. " target="_blank">
[21]	LIM I L，JOHNSTON I W，CHOI S K，et al. Fracture testing of a soft rock with semicircular specimens under three point bending. Part 2—mixed mode[J]. International Journal of Rock Mechanics and Mining Sciences，1994，31(3)：199-212. " target="_blank">
[2]	何思明，吴永，李新坡. 地震诱发岩体崩塌的力学机制[J]. 岩石力学与工程学报，2010，29(增1)：3 359-3 363.(HE Siming，WU Yong，LI Xinpo. Collapse mechanism of danger rock triggered by earthquake[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(Supp.1)：3 359-3 363.(in Chinese)) " target="_blank">
[4]	姚飞. 水力裂缝延伸过程中的岩石断裂韧性[J]. 岩石力学与工程学报，2004，23(14)：2 346-2 350.(YAO Fei. Fracture toughness in hydraulic fracture propagation[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(14)：2 346-2 350.(in Chinese))
[8]	EPSTEIN J S，DADKHAH M S. Moiré interferometry in fracture research[C]// Experimental Techniques in Fracture. New York：Wiley-VCH，1993：427-508. " target="_blank">
[14]	RETHORE J，GRAVOUIL A，MORESTIN F，et al. Estimation of mixed-mode stress intensity factors using digital image correlation and an interaction integral[J]. International Journal of Fracture，2005，132(1)：65-79.
[16]	DU Y，DÍAZ F A，BURGUETE R L，et al. Evaluation using digital image correlation of stress intensity factors in an aerospace panel[J]. Experimental Mechanics，2011，51(1)：45-57.
[19]	代树红，马胜利，潘一山，等. 隐伏走滑断层破裂扩展特征的实验研究[J]. 地震地质，2006，28(4)：635-645.(DAI Shuhong，MA Shengli，PAN Yishan，et al. Experimental study of rupture propagation along buried strike-slip fault[J]. Seismology and Geology，2006，28(4)：635-645.(in Chinese))
[22]	KHAN K，AL-SHAYEA N A. Effect of specimen geometry and testing method on mixed mode I-II fracture toughness of a limestone rock from Saudi Arabia[J]. Rock Mechanics and Rock Engineering，2000，33(3)：179-206.
[1]	颜玉定，尹祥础，廖远群，等. 某些测试条件对岩石断裂韧度KIC的影响[J]. 岩石力学与工程学报，1991，10(4)：382-386.(YAN Yuding，YIN Xiangchu，LIAO Yuanqun，et al. Effect of certain test conditions upon rock fracture toughness KIC[J]. Chinese Journal of Rock Mechanics and Engineering，1991，10(4)：382-386.(in Chinese))
[11]	OLDEN E J，PATTERSON E A. Optical analysis of crack tip stress fields: a comparative study[J]. Fatigue and Fracture of Engineering Materials and Structures，2004，27(7)：623-636. " target="_blank">