Levend Tutluoğlu

Department of Mining Engineering
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Investigation of Beam Specimen Geometries under Four Point Asymmetric Bending for Shear Mode Fracture Toughness Measurements of Rocks
Alkan, Uğur; Tutluoğlu, Levend (null; 2016-06-26)
Four-point asymmetric bending beam geometry can conveniently be used in shear mode fracture testing of rock and concrete-like materials. Stress intensity factors are computed by contour integration procedure embedded in a ...
Relationship Between Pre-failure and Post-failure Mechanical Properties of Rock Material of Different Origin
Tutluoğlu, Levend; Karpuz, Celal (Springer Science and Business Media LLC, 2015-01-01)
Under compression, gathering data related to the post-failure part of the stress-strain curve requires stiff servo-controlled testing systems. In unconfined conditions, data related to the post-peak region of the intact ro...
Penetration rate prediction for diamond bit drilling by adaptive neuro-fuzzy inference system and multiple regressions
BASARIR, HAKAN; Tutluoğlu, Levend; Karpuz, Celal (Elsevier BV, 2014-05-01)
In many mining, civil, and petroleum engineering applications diamond bit drilling is widely used due to high penetration rate, core recovery and its ability to drill with less deviation. Recently, many research have been ...
Effects of geometric factors on mode I fracture toughness for modified ring tests
Tutluoğlu, Levend (2012-04-01)
Stress intensity factors of specimen models with various external diameters, inner hole diameters, and extents of flattened loading boundaries for the modified ring testing method for mode I fracture are computed by finite...
Mode I fracture toughness determination with straight notched disk bending method
Tutluoğlu, Levend (2011-12-01)
A new method called the straight notched disk bending method is developed for mode I fracture toughness determination using rock cores. Disk specimens of andesite and marble having a single straight edge notch were subject...
Investigation of proper specimen geometry for mode I fracture toughness testing with flattened Brazilian disc method
KELES, Cigdem; Tutluoğlu, Levend (2011-05-01)
Investigation of geometrical parameters for flattened Brazilian disc method is important, since this is a simple and attractive method for mode I fracture toughness testing on rock cores. Evaluating numerical modeling resu...
Two and three dimensional analysis of a slope failure in a lignite mine
Tutluoğlu, Levend; Karpuz, Celal (2011-02-01)
With about 9.3 billion tons of reserve, lignite is a major source for energy production in Turkey. The Afsin-Elbistan lignite basin, containing 47% of the overall lignite reserve in Turkey, lies in the Afsin and Elbistan d...
Geostatistical modeling of spatial variability of SPT data for a borax stockpile site
Basarir, Hakan; Kumral, Mustafa; Karpuz, Celal; Tutluoğlu, Levend (Elsevier BV, 2010-8)
The major borax producer, Eti Mining Co. of Turkey, planned to construct an export stock site located near the Bandirma Harbor in the northwestern of Turkey. During this construction, some stability problems were encounter...
Stability Charts for the Collapse of Residual Soil in Karst
DRUMM, Eric C.; Akturk, Oezguer; Akgün, Haluk; Tutluoğlu, Levend (American Society of Civil Engineers (ASCE), 2009-07-01)
Collapse of the residual soil over bedrock cavities often occurs during construction in karst terrain, particularly when the thickness of the residuum is reduced during excavation. Even if an estimate of the strength of th...
Specific energy based rippability classification system for coal measure rock
Basarir, H.; Karpuz, Celal; Tutluoğlu, Levend (Elsevier BV, 2008-02-01)
Specific energy is simply defined as the work done per unit volume of rock excavated. Specific energy is an important performance parameter as it relates cutting force to the amount of rock excavated. In this paper the dev...
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