中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 11 No. 2 April 2001 |
uni-axial loading using index-parabola damage model
（1. College of Resource, Environment and Civil Engineering,
Central South University,Changsha 410083, P.R.China；
2. Protective Technology Research Centre, c/o School of Civil and Structural Engineering,
Nanyang Technological University, Singapore 639798）
Abstract:The limitations of several existing classical rock damage models were critically appraised. Thereafter, a description of a new model to estimate the response of rock was provided. The results of an investigation lead to the development and confirmation of a new index-parabola damage model. The new model is divided into two parts, fictitious damage and real damage and bordered by the critical damage point. In fictitious damage, the damage variable follows the index distribution, while in the real damage a parabolic distribution is used. Thus, the so-called index-parabola damage model is derived. The proposed damage model is applied to simulate the damage procedure of marble under uni-axial loading. The results of the tests show that the proposed model is in excellent agreement with experimental data, in particular the nonlinear characteristic of rock deformation is adequately represented.
Key words: index-parabola damage model; uni-axial loading; nonlinear behavior of marble
