A micromechanical analysis of damage propagation in fluid-saturated cracked media
A micromechanical analysis of damage propagation in fluid-saturated cracked media
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DOI：
10.1016/j.crme.2006.05.007
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发表时间：
2006-07-01
影响因子：
0.8
通讯作者：
Ulm, Franz-Josef
中科院分区：
文献类型：
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作者：
Dormieux, Luc;Kondo, Djimedo;Ulm, Franz-Josef
我们首先回顾了流体饱和裂纹情况下的线弹性断裂力学(LEFM)的著名框架。接下来我们考虑一辆房车。由相应的裂纹密度参数ε表征的一族裂纹族的裂隙介质。推广了LEFM的经典能量方法，所提出的损伤判据写在与epsilon有关的热力学作用力上，并通过标准的均匀化格式进行估计。这一判据被证明涉及宏观有效应变张量，或者太沙基有效应力张量。讨论了不同均匀化方案下损伤扩展的稳定性。对混凝土进行了单轴拉伸试验，并与试验结果进行了比较。
We first revisit the well known framework of Linear Elastic Fracture Mechanics (LEFM) in the case of a fluid-saturated crack. We next consider a r.e.v. of cracked medium comprising a family of cracks characterized by the corresponding crack density parameter epsilon. Generalizing the classical energy approach of LEFM, the proposed damage criterion is written on the thermodynamic force associated with epsilon, which is estimated by means of standard homogenization schemes. This criterion proves to involve a macroscopic effective strain tensor, or alternatively the Terzaghi effective stress tensor. The stability of damage propagation is discussed for various homogenization schemes. A comparison with experimental results is presented in the case of a uniaxial tensile test on concrete.