SIMULATION OF MARBLE FAILURE IN COMPRESSION WITH DIGITAL IMAGE INTERFACE STRESS ELEMENT METHOD
SHAO Guojian1，DU Peirong1，2，LI Ang1，ZHU Yihuan1
(1. Department of Engineering Mechanics，Hohai University，Nanjing，Jiangsu 210098，China；2. Department of Engineering Mechanics，North China University of Water Resources and Electric Power，Zhengzhou，Henan 450011，China)
Abstract：Based on the inside meso-constitution of rock and guided by the structure control theory，failure mechanism of rock in compression is studied. Photographs of marble from Jinping hydropower is processed with the digital image processing techniques. Images of marble can be transformed into grayscale images and the gray value of pixel matrix can describe the mesoscale constitution and inhomogeneity of marble. Using geometry algorithms and mesh generation techniques，elements of pixels can be transformed into meshes for numerical simulation. Failure phenomenon of uniaxial compression and required material parameter are got from indoor test. With gray value distribution mesostructure is evaluated parameters. Numerical simulation of mesostructure of marble is carried out with interface stress element method for discontinuity medium. Local stress and deformation can be got as a result of inhomogeneity. The result can interpret the macro phenomena of test because of inhomogeneity.
2012, Vol. 31 
