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基于数字图像测量系统的三轴试样变形研究 被引量:1

Deformation Study on Triaxial Specimen Using the Digital Image Measuring System
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摘要 基于亚像素角点检测的图像测量技术能够记录试样表面方块角点每一时刻的位移,从而获得试样的表面应变场。将基于试样表面6行方块分别计算的应变与基于全部6行方块的整体平均计算得到的结果进行比较,显示中间4行方块区域的变形基本不受端部约束影响。还对采用试样上、中、下三个部分与整个试样的测量结果获得的应力与应变特性进行了对比分析。该方法能够测量任意时刻试样的轴向应变场,通过轴向应变场的变化可以准确地描述试样剪切带的产生、发展以及完全形成的全过程。 Based on the sub-pixel accurate corner locator in the digital image measurement system,every moment displacement on the sample surface square corner can be recorded,and the specimen surface strain field can be get.The radial strains calculated respectively on 6 lines of squares are compared with the strain calculated on whole six lines squares.The results show that the deformations on middle four lines of square field are basically not influenced by the end restraint.The characteristics of the stress and strain calculated by testing on the top,the middle,the bottom and the whole of the samples are comparatively analyzed.This method can measure the axial strain field at any time.The whole process of initial produce, development and fully-formation of the sample shear band are accurately described by the change of axial strain field.
作者 王健 郭莹
出处 《西北地震学报》 CSCD 北大核心 2011年第B08期175-180,共6页 Northwestern Seismological Journal
基金 国家自然科学基金青年基金(50808033)
关键词 亚像素角点检测 数字图像测量 端部约束 应变场 剪切带 Sub-pixel accurate corner locator Digital image measuring End restraint Strain field Shear band
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  • 1.SL237—1 999.土工试验规程[S].,.. 被引量:1
  • 2Rowe P W.The stress dilatancy relation for static equilibrium of an assembly of particles in contact[A].Proc.of Royal Society,Series A[C].London:【S.n.】,1962.269:500-527. 被引量:1
  • 3Zhang H. Steady state behavior of sands and limitations of the triaxial tests[D]. Ottawa: University of Ottawa, 1997. 被引量:1
  • 4Roscoe K H, Schofield A N, Worth C P. Correspondence on the yielding of soils [J]. Geotechnique, 1959, 9 (3):72. 被引量:1
  • 5黄文熙,土的工程性质,1983年 被引量:1
  • 6LADE P V,TSAI J.Effects of localization in triaxial tests on clays[C]// Proc XXIst Int Conf Soil Meth Found Eng,San Francisco,1985:549-552. 被引量:1
  • 7RHEE Y.Experimental evaluation of strain softening behaviour of normally,consolidated Chicago clay in plane strain compression[D].Evanston,IL:Northwestern Unversity,1991. 被引量:1
  • 8VIGGARNI G,FINNO R J,HARRIS W W.Experimental observations of strain localization in plane strain compression of a stiff clay[C]// Proc 3rd Int Workshop Localization Theory for Soils and Rocks,Aussois,Balkema,1993:189-198. 被引量:1
  • 9HICHER P Y,WAHYUDI H,TESSIER D.Microstructure analysis of strain localization in clay[J].Computers and Geotechnic,1994,16:205-222. 被引量:1
  • 10BURLAND J B.On the compressibility and shear strength of natural clays[J].Geotechnique,1990,40:329-378. 被引量:1

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