...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Theoretical and Applied Fracture Mechanics >Microcrack interaction brittle rock subjected to uniaxial tensile loads
【24h】

Microcrack interaction brittle rock subjected to uniaxial tensile loads

机译：承受单轴拉伸载荷的微裂纹相互作用脆性岩石

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A micromechanics-based model is proposed to describe unstable damage evolution in microcrack-weakened brittle rock material. The influence of all microcracks with different sizes and orientations are introduced into the constitutive relation by using the statistical average method. Effects of microcrack interaction on the complete stress-strain relation as well as the localization of damage for microcrack-weakened brittle rock material are analyzed by using effective medium method. Each microcrack is assumed to be embedded in an approximate effective medium that is weakened by uniformly distributed microcracks of the statistically-averaged length depending on the actual damage state. The elastic moduli of the approximate effective medium can be determined by using the dilute distribution method. Micromechanical kinetic equations for stable and unstable growth characterizing the 'process domains' of active microcracks are taken into account. These 'process domains' together with 'open microcrack domains' completely determine the integration domains of ensemble averaged constitutive equations relating macro-strain and macro-stress. Theoretical predictions have shown to be consistent with the experimental results. (C) 2006 Elsevier Ltd. All rights reserved.
机译：提出了一种基于微力学的模型来描述微裂纹弱化的脆性岩石材料中的不稳定损伤演化。通过统计平均法将所有大小和方向不同的微裂纹的影响引入本构关系。利用有效介质法分析了微裂纹相互作用对完整的应力-应变关系以及微裂纹弱化脆性岩石材料损伤局部化的影响。假定每个微裂纹都嵌入一个近似有效的介质中，该介质会因实际损坏状态而被统计平均长度的均匀分布的微裂纹所削弱。近似有效介质的弹性模量可以通过使用稀分布法来确定。考虑了稳定和不稳定生长的微机械动力学方程，该方程表征了活性微裂纹的“过程域”。这些“过程域”与“开放微裂纹域”一起完全确定了涉及宏观应变和宏观应力的整体平均本构方程的积分域。理论预测已显示与实验结果一致。 （C）2006 Elsevier Ltd.保留所有权利。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号