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Crack Instigation and Propagation of Transversely Isotropic Biotite Gneiss
The physical characteristics of a well-defined transverse isotropy plays a significant role in the determination of the indirect tensile strength of intact biotite gneiss. The mineralogical elements and its alignment in its gneissosity plane of this rock are accountable for the said phenomenon. Crack instigation and propagation toward the loading plane are an indicator of the tensile failure of the specimen, which is mandatory. An experimental investigation to determine the impact of transverse isotropy on crack instigation and its propagation on intact biotite gneiss has been studied considering seven various loading angles with respect to gneissosity plane. Also, the tensile strength analysis to study the validity of the crack instigation whether the accuracy of the crack instigation is from the center or the loading plane, as still there are various arguments among various researchers. This study infers that the positioning of the rock core with respect to the foliation plays a vital role in determining the strength of samples in tension indirectly. The maximum sample’s strength where the crack instigated at the center was obtained when the plane is at 0°, and minimum strength was observed when the plane is at 90°. Further, 60° to 90° angle provides the most conservative value of indirect tensile strength and has highest possibilities of tensile failure.
Crack Instigation and Propagation of Transversely Isotropic Biotite Gneiss
The physical characteristics of a well-defined transverse isotropy plays a significant role in the determination of the indirect tensile strength of intact biotite gneiss. The mineralogical elements and its alignment in its gneissosity plane of this rock are accountable for the said phenomenon. Crack instigation and propagation toward the loading plane are an indicator of the tensile failure of the specimen, which is mandatory. An experimental investigation to determine the impact of transverse isotropy on crack instigation and its propagation on intact biotite gneiss has been studied considering seven various loading angles with respect to gneissosity plane. Also, the tensile strength analysis to study the validity of the crack instigation whether the accuracy of the crack instigation is from the center or the loading plane, as still there are various arguments among various researchers. This study infers that the positioning of the rock core with respect to the foliation plays a vital role in determining the strength of samples in tension indirectly. The maximum sample’s strength where the crack instigated at the center was obtained when the plane is at 0°, and minimum strength was observed when the plane is at 90°. Further, 60° to 90° angle provides the most conservative value of indirect tensile strength and has highest possibilities of tensile failure.
Crack Instigation and Propagation of Transversely Isotropic Biotite Gneiss
Lecture Notes in Civil Engineering
Shukla, Sanjay Kumar (editor) / Raman, Sudharshan N. (editor) / Bhattacharjee, B. (editor) / Singh, Priyanka (editor) / Gupta, Sachin (author) / Aji, Sangeetham (author) / Dixit, Mahabir (author)
International Conference on Trends and Recent Advances in Civil Engineering ; 2022 ; Noida, India
2023-06-22
10 pages
Article/Chapter (Book)
Electronic Resource
English
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