Scholarlink

<p>The expansion of clay minerals in water significantly contributes to mudstone softening. This study investigates how key clay minerals influence mudstone’s strength and energy dissipation during failure. X-ray diffraction was used to analyze changes in micro-mineral composition before and after water saturation. The crack volume strain inflection point method was applied to assess the effects of saturation on characteristic strength and dissipated energy. Results show that illite, which increased by 50.8% after saturation, plays a crucial role in reducing strength and increasing dissipated energy. During the accelerated crack expansion phase, expansion strength decreased by 78%, while dissipated energy increased by 98%. Polynomial correlations were established among expansion strength, clay mineral content, and dissipated energy, highlighting that higher clay mineral content and lower expansion strength lead to greater energy dissipation. A nonlinear dissipated energy model incorporating expansion strength and the saturated damage factor was developed, offering improved accuracy in describing energy evolution during failure. This study provides valuable insights for evaluating mudstone stability in saturated environments.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Impact of Clay Minerals on the Characteristic Strength and Nonlinear Dissipative Energy Modeling of Water-Saturation Mudstone

  • 期刊论文

  • 发表日期：

    2025年4月28日

查看全文
  • Yugang Cheng,
  • Rui Wu,
  • Bo Hu,
  • Mengru Zeng,
  • Yong Zhao,
  • Gexin Wan,
  • Xuefu Zhang,
  • Jinjie Yang

摘要

The expansion of clay minerals in water significantly contributes to mudstone softening. This study investigates how key clay minerals influence mudstone’s strength and energy dissipation during failure. X-ray diffraction was used to analyze changes in micro-mineral composition before and after water saturation. The crack volume strain inflection point method was applied to assess the effects of saturation on characteristic strength and dissipated energy. Results show that illite, which increased by 50.8% after saturation, plays a crucial role in reducing strength and increasing dissipated energy. During the accelerated crack expansion phase, expansion strength decreased by 78%, while dissipated energy increased by 98%. Polynomial correlations were established among expansion strength, clay mineral content, and dissipated energy, highlighting that higher clay mineral content and lower expansion strength lead to greater energy dissipation. A nonlinear dissipated energy model incorporating expansion strength and the saturated damage factor was developed, offering improved accuracy in describing energy evolution during failure. This study provides valuable insights for evaluating mudstone stability in saturated environments.