입자결합모델을 이용한 횡방향 변형률 제어 하에서의 암석의 일축 및 삼축압축시험의 수치적 모사
Numerical Simulation of Radial Strain Controlled Uniaxial and Triaxial Compression Test of Rock Using Bonded Particle Model
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초록
본 연구에서는 Class II 거동에 대해 입자결합모델을 이용하여 수치해석적인 방법으로 살펴보았으며, 횡방향 변형률 제어 압축시험을 수치해석적으로 모사할 수 있는 방법을 제시하였다. 수치해석에서 사용된 미시변수는 스웨덴 Ӓspӧ Hard Rock Laboratory에서 수행한 일축압축시험을 이용하여 결정하였다. 제시된 수치해석 기법을 이용해 Ӓspӧ 암석의 Class II 거동을 효과적으로 모사할 수 있었으며, 수치해석의 결과는 실험실 시험 결과와 잘 일치하였다.
Abstract
In this study, Class II behavior of rock failure process under uniaxial and biaxial compression has been numerically simulated using bonded particle model. Class II behavior of rock was simulated by radial strain controlled uniaxial and biaxial compression tests using a suggested method of ISRM. Micro-parameters used in the simulation were determined based on the laboratory uniaxial compression tests carried out at Ӓspӧ Hard Rock Laboratory, Sweden. Class II behavior of Ӓspӧ rock was effectively simulated using newly proposed numerical technique in this study, and the results of numerical simulations show good similarity with the complete stress-strain curves for Class II behavior obtained from the laboratory tests.
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