DETERMINATION OF MODE II FATIGUE CRACK GROWTH BEHAVIOR IN RAILWAY STEELS

Evaluation of fatigue performance of a fillet rolled diesel engine crankshaft Cevik, Gul; Gürbüz, Rıza (2013-01-01) This paper summarizes an investigation of the effect of fillet rolling on fatigue behavior of a ductile cast iron crankshaft used in diesel engine applications. Based on the staircase test methodology, resonant bending fatigue tests were conducted to obtain stress versus number of cycles curves and to evaluate the fatigue endurance limits of ductile iron crankshaft under fillet rolled and un-rolled conditions. The corresponding stress levels on the fillet region by the applied test moments were calculated b...
Analysis of ratcheting by using different yield criteria and kinematic hardening models for uniaxial and biaxial loading İşler, Mert; Darendeliler, Haluk; Department of Mechanical Engineering (2018) Ratcheting, the accumulation of plastic strain under cyclic loading, will be investigated for uniaxial and biaxial loading in this study. The simulations of ratcheting will be carried on for different yield criteria and kinematic hardening rules. The corresponding stress-strain relations will be developed and used in the numerical analysis by implementing subroutines to a commercial finite element software. The numerical results will be compared with the experimental ones to evaluate the applicability of th...
Mode II fatigue crack growth behavior and mode II fracture toughness of 7050 aluminium alloy in two orientations Yurtoğlu, M. Ender; Gürbüz, Rıza; Department of Metallurgical and Materials Engineering (2013) Fatigue crack growth behavior of AA7050 T7451 aluminum alloy under mode II loading condition in two orientations was investigated. Compact shear specimens were prepared in TL and LT directions. A loading frame for mode II type of loading was manufactured. Using the loading frame and the specimen, KIIC values and mode II fatigue crack growth rates were calculated. Fractographic analysis of the fracture surfaces of both mode II fracture toughness test specimens and mode II fatigue crack growth test specimens ...
Microstructure control of AISI 4135 for optimization of fatigue and fracture performance Özcan, Burak; Gür, Cemil Hakan; Yurtışık, Koray; Department of Metallurgical and Materials Engineering (2018) Avoiding early fatigue failure of the AISI 4135 steel shafts in trains is an important task. This study aims to improve the damage tolerance of AISI 4135 steel by modifying its microstructure via heat treatment. The overall effect of various heat treatment procedures on the damage tolerance was analyzed by considering the threshold stress intensity factor and fatigue strength. Detailed investigations on the mechanical properties were performed, and fracture surfaces were investigated. The resistance of the ...
Analysis of blast loading effect on regular steel building structures Tahmilci, Fatih; Caner, Alp; Department of Civil Engineering (2007) Concern about effect of explosives effect on engineering structures evolved after the damage of Second World War. Beginning from 90’s with the event of bombing Alfred P. Murrah Federal building located in Oklahoma City this concern deepened and with the attack to World Trade Center twin towers on September 11, 2001 it is peaked. Recent design codes mainly focus on earthquake resistant design and strengthening of the structures. These code design methodologies may sometimes satisfy current blast resistant de...

Citation Formats

R. Gürbüz, “DETERMINATION OF MODE II FATIGUE CRACK GROWTH BEHAVIOR IN RAILWAY STEELS,” 2013. Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/60018.