Investigating the effects of porosity on the strength and mechanical behaviors of geo-materials’ specimens

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکترا، دانشکده مهندسی معدن و متالورژی دانشگاه یزد

2 دانشکده مهندسی معدن و متالورژی، دانشگاه یزد

3 گروه مکانیک سنگ، دانشگاه تربیت مدرس تهران

4 فارغ اتحصیل دکتری، دانشکده مهندسی معدن و متالورژی، دانشگاه یرد.

10.22034/anm.2024.21058.1620

چکیده

Porosity plays a crucial role in both natural and man-made materials, serving as a fundamental microstructural characteristic that has a significant impact on their physical properties. Soils and rocks in nature are porous materials that are usually saturated with different fluids such as water, oil and gas. Therefore, it is very important to investigate the properties of porous materials and a better understanding of porous materials properties can lead to progress in oil, mining and civil industries. In this research, porous geo-material samples with different porosity percentages were made and analyzed. The laboratory generation of actual porosity within the rock-like material samples was one of a significant aspect of this research. 5 groups of samples with different percentage of porosities were prepared including: 20%, 15%, 10%, 5%, 2% porosity and classified in 5 groups of A, B, C, D and E, respectively. Various experimental tests were performed on the samples and the mechanical parameters of the samples were determined. These experiments show that the uniaxial compression and tensile strengths and elastic modulus of the rock-like specimens decrease with increasing their porosity. In other words, the maximum values of the mechanical parameters were related to the samples of group E (with 2-3% porosity) and the minimum values were those of group A (with 20% porosity). Another parameter investigated was the ratio of lateral strain to axial strain (Poisson's ratio). The results show that Poisson's ratio increases with the increase in porosity i.e. the maximum Poisson's ratio was related to the group A with 20% porosity and the minimum value was related to that of group E with 2-3% porosity.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Investigating the effects of porosity on the strength and mechanical behaviors of geo-materials’ specimens

نویسندگان [English]

  • Abolfazl Dalirnasab 1
  • Mohammad Fatehi Marji 2
  • Hamid Reza Nejati 3
  • Mohsen Mohebbi 4
1 Ph.D. Student, Department of Mining and Metallurgical Engineering, Yazd University, Yazd, Iran
2 Department of Mining and Metallurgical Engineering, Yazd University, Yazd, Iran
3 Department of Rock Mechanics, Tarbiat Modares University, Tehran, Iran
4 Ph. D., in Rock Mechanics, Department of Mining and Metallurgical Engineering, Yazd University, Yazd, Iran
چکیده [English]

Porosity plays a crucial role in both natural and man-made materials, serving as a fundamental microstructural characteristic that has a significant impact on their physical properties. Soils and rocks in nature are porous materials that are usually saturated with different fluids such as water, oil and gas. Therefore, it is very important to investigate the properties of porous materials and a better understanding of porous materials properties can lead to progress in oil, mining and civil industries. In this research, porous geo-material samples with different porosity percentages were made and analyzed. The laboratory generation of actual porosity within the rock-like material samples was one of a significant aspect of this research. 5 groups of samples with different percentage of porosities were prepared including: 20%, 15%, 10%, 5%, 2% porosity and classified in 5 groups of A, B, C, D and E, respectively. Various experimental tests were performed on the samples and the mechanical parameters of the samples were determined. These experiments show that the uniaxial compression and tensile strengths and elastic modulus of the rock-like specimens decrease with increasing their porosity. In other words, the maximum values of the mechanical parameters were related to the samples of group E (with 2-3% porosity) and the minimum values were those of group A (with 20% porosity). Another parameter investigated was the ratio of lateral strain to axial strain (Poisson's ratio). The results show that Poisson's ratio increases with the increase in porosity i.e. the maximum Poisson's ratio was related to the group A with 20% porosity and the minimum value was related to that of group E with 2-3% porosity.

کلیدواژه‌ها [English]

  • Porosity
  • Uniaxial compressive strength
  • Tensile strength
  • Mechanical properties
  • Rock-like materials
روش های تحلیلی و عددی در مهندسی معدن

مقالات آماده انتشار، پذیرفته شده
انتشار آنلاین از تاریخ 12 اسفند 1402

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  • تاریخ دریافت: 10 دی 1402
  • تاریخ بازنگری: 15 بهمن 1402
  • تاریخ پذیرش: 12 اسفند 1402

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