Scholarlink

<p>Water has a significant impact on the mechanical properties of granite and is of great significance in ensuring the engineering stability, safety and reliability of construction, and scientific management. Based on the rock damage theory, after water immersion and dry–wet cycles treatment, uniaxial compressive strength and split Hopkinson pressure bar tests were conducted on the granite samples. The attenuation laws of compressive strength and elastic modulus under different moisture contents, as well as the attenuation laws of impact stress–strain characteristics under different dry–wet cycles were obtained. Through the analysis of the fracture morphology and the scanning electron microscopy (SEM) test, the macro and micro damage mechanisms of granite sample were obtained. The main results are that with the increase of moisture content, both the uniaxial compressive strength and elastic modulus of granite show a decreasing trend, while the damage rate shows an increasing trend. With the increase of dry–wet cycles, the dynamic deformation modulus gradually decreases, the damage degree gradually increases, and all show a linear changing trend. With the increase of the damage degree, the peak stress and deformation modulus of the dynamic stress–strain curve gradually decrease, while the peak strain, failure strain and average strain rate gradually increase. The size of the sample fragments after failure is directly proportional to the degree of damage. Water enters the interior of granite through fissures and cracks, and intensifies the complexity and randomness of primary microcracks and new cracks through dissolution and micro-pore water pressure. In this study, by analyzing the effect of water on the mechanical properties of granite, the attenuation law of impact stress–strain characteristics under dry and wet cycles was obtained, and the macro and micro damage mechanism of granite was summarized. The research results can provide reference value for the construction and maintenance of rock engineering in water environment.</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

Research on the Static and Dynamic Mechanical Properties and Damage Mechanism of Granite Under Different Moisture Contents

  • 期刊论文

  • 发表日期：

    2026年7月20日

查看全文
  • Yanli Wu,
  • Bingquan Wu

摘要

Water has a significant impact on the mechanical properties of granite and is of great significance in ensuring the engineering stability, safety and reliability of construction, and scientific management. Based on the rock damage theory, after water immersion and dry–wet cycles treatment, uniaxial compressive strength and split Hopkinson pressure bar tests were conducted on the granite samples. The attenuation laws of compressive strength and elastic modulus under different moisture contents, as well as the attenuation laws of impact stress–strain characteristics under different dry–wet cycles were obtained. Through the analysis of the fracture morphology and the scanning electron microscopy (SEM) test, the macro and micro damage mechanisms of granite sample were obtained. The main results are that with the increase of moisture content, both the uniaxial compressive strength and elastic modulus of granite show a decreasing trend, while the damage rate shows an increasing trend. With the increase of dry–wet cycles, the dynamic deformation modulus gradually decreases, the damage degree gradually increases, and all show a linear changing trend. With the increase of the damage degree, the peak stress and deformation modulus of the dynamic stress–strain curve gradually decrease, while the peak strain, failure strain and average strain rate gradually increase. The size of the sample fragments after failure is directly proportional to the degree of damage. Water enters the interior of granite through fissures and cracks, and intensifies the complexity and randomness of primary microcracks and new cracks through dissolution and micro-pore water pressure. In this study, by analyzing the effect of water on the mechanical properties of granite, the attenuation law of impact stress–strain characteristics under dry and wet cycles was obtained, and the macro and micro damage mechanism of granite was summarized. The research results can provide reference value for the construction and maintenance of rock engineering in water environment.