Simulation of viscoelastic behavior of defected rock by using numerical manifold method

作     者：Feng REN Lifeng FAN Guowei MA 

作者机构：School of Civil and Environmental EngineeringNanyang Technological UniversitySingapore 639798Singapore School of Civil and Resource EngineeringThe University of Western AustraliaCrawleyWA 6009Australia 

出 版 物：《Frontiers of Structural and Civil Engineering》 (结构与土木工程前沿（英文版）)

年 卷 期：2011年第5卷第2期

页      面：199-207页

学科分类：1305[艺术学-设计学（可授艺术学、工学学位）] 08[工学] 0813[工学-建筑学] 0814[工学-土木工程] 080102[工学-固体力学] 0801[工学-力学（可授工学、理学学位）] 

主　　题：stress wave propagation defected rock numerical manifold method viscoelastic behavior storage modulus loss modulus 

摘      要：Numerical simulations of longitudinal wave propagation in a rock bar with microcracks are conducted by using the numerical manifold method which has great advantages in the simulation of ***,validation of the numerical manifold method is carried out by simulations of a longitudinal stress wave propagating through intact and cracked rock *** behavior of the stress wave traveling in a one-dimensional rock bar with randomly distributed microcracks is subsequently *** is revealed that the highly defected rock bar has significant viscoelasticity to the stress wave *** attenuation as well as time delay is affected by the length,quantity,specific stiffness of the distributed microcracks as well as the incident stress wave *** storage and loss moduli of the defected rock are also affected by the microcrack properties;however,they are independent of incident stress wave frequency.