Numerical method for crack extension analysis based on fatigue fracture process of rock materials

ZHOU Shang-zhi; DANG Fa-ning; CHEN Hou-qun; LONG Qiao-ling

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Numerical method for crack extension analysis based on fatigue fracture process of rock materials

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- Numerical method for crack extension analysis based on fatigue fracture process of rock materials
- Vol. 29, Issue 3, (2008)
- 作者机构：
  
  1. 长沙理工大学桥梁与结构学院,长沙,410076
  2. 西安理工大学水利水电学院,西安,710048
  3. 中国水利水电科学研究院工程抗震中心,北京,100044
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU375
- Online First：19 July 2013，
  
  Published：2008
- 稿件说明：
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ZHOU Shang-zhi, DANG Fa-ning, CHEN Hou-qun, et al. Numerical method for crack extension analysis based on fatigue fracture process of rock materials[J]. 2008, 29(3).
DOI：

ZHOU Shang-zhi, DANG Fa-ning, CHEN Hou-qun, et al. Numerical method for crack extension analysis based on fatigue fracture process of rock materials[J]. 2008, 29(3). DOI：

摘要

在进行岩石类材料疲劳断裂破坏的数值分析时，将损伤力学将裂纹形成与裂纹扩展两个过程有机结合在一起。根据裂纹形成阶段的疲劳曲线（S-N），描述疲劳发展的损伤演变方程，提出了疲劳裂纹扩展的数值计算方法。建立了扩展阶段中裂纹尺寸与载荷循环次数之间的关系，从而将裂纹萌生与扩展这两个独立过程纳入一个统一的理论体系。该方法与断裂力学结合计算出的疲劳寿命与试验值相吻合。

Abstract

Numerical analysis of fatigue fracture process of rock materials

two phases

fatigue crack initiation and extension

are rightly associated by damage mechanics method. Based on fatigue curve in the crack initiation process

a numerical method to compute the fatigue crack extension

is proposed. The relation between crack length and fatigue life in the crack extension can be obtained by the damage mechanics-finite element method. The above two phases being separately dealt in existing researches are brought into a unified theoretical frame. This method is used to analyze rock-concrete materials

the fatigue lives calculated agree well with the experimental ones.

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