Browsing by Author "Gogus, Ozge Dinc"

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Citation - WoS: 1
Citation - Scopus: 1
Fractal Characterization of Crack Patterns in Intact Rocks Under Triaxial Compression
(Springer, 2025) Gogus, Ozge Dinc; Avsar, Elif; Calik, Ayten
Understanding crack development in rocks under varying confining stresses is critical for assessing rock mass stability in engineering projects, such as tunnels, slopes, and underground storage facilities. This study employs fractal dimension (D) analysis to quantify crack complexity in diabase, ignimbrite, and marble subjected to triaxial compression, with implications for predicting environmental impacts of rock failure. Crack patterns were evaluated using digital image processing and the box-counting method. Results demonstrate that both confining stress and mineralogical composition significantly influence crack morphology and failure modes. Diabase exhibits highly branched cracks (higher D values) due to its interlocking grain texture, while marble produces simpler cracks (lower D values). The cracking behavior of ignimbrite lies between that of marble and diabase, characterized by curved cracks influenced by its weak matrix. Increasing confinement reduces D values, reflecting smoother cracks and transitions from tensile to shear-dominated failure. These findings highlight the utility of fractal analysis in geomechanics, offering quantitative insights into stress-induced damage evolution and its relevance to sustainable engineering applications.
Citation - WoS: 6
Citation - Scopus: 5
The Role of Mineralogical and Textural Complexity in the Damage Evolution of Brittle Rocks
(Nature Portfolio, 2024) Gogus, Ozge Dinc; Avsar, Elif; Develi, Kayhan; Calik, Ayten
In brittle rocks, deformation is characterized by the initiation and propagation of cracks at both microscale and mesoscale levels. This study explores how rock texture influences the evolution of cracking networks and progressive rock damage results under uniaxial compression. 3D discrete analyses were employed to identify the critical stresses of three different rock types. Thin sections were prepared from uniaxially loaded core samples at these stresses and crack patterns were captured under a polarizing microscope. The fractal box dimension method was used to quantitatively analyze the crack patterns for each rock type at each stress level. The novelty of this research is revealing the relationship between the development of microcrack patterns and textural properties such as mineral orientation/distribution, interlocking, crystal cleavage/hardness, and the groundmass. Results show that the cracking tendency varies with rock type at each critical stress level. Specifically, diabase exhibited the highest crack intensity, attributed to the interlocking of hard plagioclase and pyroxene crystals. Furthermore, the cleavages in pyroxenes make diabase particularly susceptible to cracking, especially when they are oriented parallel or semi-parallel to the applied load. These findings highlight that rock texture is a crucial factor influencing microcrack development, which should be considered in rock engineering applications.
The Role of Mineralogical and Textural Complexity in the Damage Evolution of Brittle Rocks (Vol 14,28641,2024)
(Nature Portfolio, 2025) Gogus, Ozge Dinc; Avsar, Elif; Develi, Kayhan; Calik, Ayten