首页|Correlations between mineral composition and mechanical properties of granite using digital image processing and discrete element method
Correlations between mineral composition and mechanical properties of granite using digital image processing and discrete element method
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This study investigated the correlations between mechanical properties and mineralogy of granite using the digital image processing(DIP)and discrete element method(DEM).The results showed that the X-ray diffraction(XRD)-based DIP method effectively analyzed the mineral composition contents and spatial distributions of granite.During the particle flow code(PFC2D)model calibration phase,the numerical simulation exhibited that the uniaxial compressive strength(UCS)value,elastic modulus(E),and failure pattern of the granite specimen in the UCS test were comparable to the experiment.By establishing 351 sets of numerical models and exploring the impacts of mineral composition on the mechanical properties of granite,it indicated that there was no negative correlation between quartz and feldspar for UCS,tensile strength(σt),and E.In contrast,mica had a significant negative correlation for UCS,σt,and E.The pres-ence of quartz increased the brittleness of granite,whereas the presence of mica and feldspar increased its ductility in UCS and direct tensile strength(DTS)tests.Varying contents of major mineral composi-tions in granite showed minor influence on the number of cracks in both UCS and DTS tests.
GraniteDigital image processingDiscrete element methodMineral compositionMechanical properties
Changdi He、Brijes Mishra、Qingwen Shi、Yun Zhao、Dajun Lin、Xiao Wang
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Department of Mining Engineering,University of Utah,Salt Lake City 84112,USA
College of Mine Safety,North China Institute of Science and Technology,Langfang 065201,China
Department of Mining Engineering,West Virginia University,Morgantown 26506,USA
Department of Electrical and Computer Engineering,University of Utah,Salt Lake City 84112,USA
College of Energy and Mining Engineering,Shandong University of Science and Technology,Qingdao 266590,China
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financial support received from the Talent Introduction Project,part of the Elite Program of Shandong University of Science
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