Title :
Digital Image Processing Technique for Improvement in Triaxial Test and Numerical Modeling of Geomaterial
Author :
Tao, Cheng ; Ke-qin, Yan
Author_Institution :
Dept. of Civil Eng., Huangshi Inst. of Technol., Huangshi
Abstract :
A contactless inspection method based on digital image processing technique is introduced to improve measurement of specimen deformation in triaxial test of geomaterials. Based on this method, a series of conventional triaxial compression tests under different stress paths are investigated. Then an elastoplastic constitutive model of soil is acquired through the numerical method of modeling constitutive law for geomaterial. Two examples of specimen deformation are presented and discussed. It indicated that the measurement precision on digital image process for column deformation is 0.01 cm3, prior to that of conventional method 0.1 cm3. Furthermore, the digital method for modeling can rationally simulate the stress-strain relationship of soil, which can reflect the effect of stress paths on soil stress-strain relationship.
Keywords :
compressive testing; elastoplasticity; geology; image processing; inspection; soil; stress-strain relations; contactless inspection method; conventional triaxial compression tests; digital image processing technique; elastoplastic constitutive model; geomaterial; numerical modeling; soil; specimen deformation; stress-strain relationship; triaxial test; Civil engineering; Coordinate measuring machines; Deformable models; Digital images; Image coding; Instruments; Numerical models; Soil measurements; Stress; Testing; digital image processing; numerical modeling; specimen deformation; stress path; triaxial test of geomaterial;
Conference_Titel :
Computing, Communication, Control, and Management, 2008. CCCM '08. ISECS International Colloquium on
Conference_Location :
Guangzhou
Print_ISBN :
978-0-7695-3290-5
DOI :
10.1109/CCCM.2008.274
