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Keywords: fatigue cracks
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Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. March 2012, 134(3): 032501.
Published Online: December 28, 2011
...James C. Newman, Jr.; Balkrishna S. Annigeri Plasticity effects and crack-closure modeling of small fatigue cracks were used on a Ti-6Al-4V alloy to calculate fatigue lives under various constant-amplitude loading conditions (negative to positive stress ratios, R) on notched and un-notched...
Journal Articles
Publisher: ASME
Article Type: Technical Briefs
J. Eng. Gas Turbines Power. September 2011, 133(9): 094501.
Published Online: April 14, 2011
...D. Gustafsson; J. J. Moverare; K. Simonsson; S. Sjöström Turbine disks are of large importance to turbine designers as they are exposed to hot environment and subjected to high loads. In order to analyze such components with respect to fatigue crack initiation, the work generally starts...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. November 2010, 132(11): 112101.
Published Online: August 16, 2010
... casting failure (mechanical) fatigue cracks fatigue testing gas turbines nickel alloys polymer blends stress analysis stress-strain relations Ni base DS superalloy gas turbine blade biaxial fatigue high temperature life prediction About 40% of electricity generated by thermal...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. October 2010, 132(10): 102901.
Published Online: June 30, 2010
.... During precracking, the crack length was visually measured with a dial gauge mounted on an optical microscope. Also, careful consideration was given to the Δ K applied to the specimens during precracking so that it would not exceed the values used in actual testing. Fatigue crack growth...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. August 2010, 132(8): 082106.
Published Online: May 26, 2010
... geometries. Crack nucleation scatter is estimated based on the variability associated with smooth specimen and fatigue crack growth data, including the influences of correlation among crack nucleation and growth phases. The influences of crack nucleation and growth variability on life and probability...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. July 2010, 132(7): 072502.
Published Online: April 14, 2010
... by the fatigue crack growth phase and is strongly dependent on the magnitude of the stress values in the contact region. These stress values often have the most influence on small cracks where traditional long-crack fracture mechanics may not apply. A number of random variables can be used to model...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. July 2009, 131(4): 042501.
Published Online: April 9, 2009
... of the turbine section. 14 12 2007 11 11 2008 09 04 2009 blades discs (structures) failure (mechanical) failure analysis fatigue cracks finite element analysis gas turbine power stations mechanical testing nozzles stress analysis surface cracks turbogenerators vibrations...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. May 2009, 131(3): 032101.
Published Online: February 10, 2009
...Xijia Wu A nonlinear creep/dwell interaction model is derived based on nucleation and propagation of a surface fatigue crack and its coalescence with creep/dwell damages (cavities or wedge cracks) along its path inside the material, which results in the total damage accumulation rate as given by d...
Journal Articles
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. May 2008, 130(3): 032501.
Published Online: March 26, 2008
...Srikant Ranjan; Nagaraj K. Arakere A comprehensive fracture-mechanics-based life prediction methodology is presented for fcc single crystal components based on the computation of stress intensity factors (SIFs), and the modeling of the crystallographic fatigue crack growth (FCG) process under mixed...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. January 2008, 130(1): 012806.
Published Online: January 11, 2008
..., as the demand for high torque, high specific power, and low emissions continues to grow, is necessitated due to the increasing operating temperatures. aluminium cast iron engines fatigue cracks fatigue testing life testing thermal stress cracking thermomechanical treatment Strain based...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. January 2008, 130(1): 012506.
Published Online: January 9, 2008
... with stress/strain concentrations and stress/strain gradients appear to be the most important sites for fatigue crack initiation. The paper addresses a nonlocal concept for cyclic life prediction of notched components. Contrary to various local approaches in the field, the proposed method explicitly accounts...
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Eng. Gas Turbines Power. October 2006, 128(4): 879–888.
Published Online: November 3, 2005
... involves considerable postprocessing work. For these reasons, it is very advantageous to develop analytical solution schemes for subsurface stresses, whenever possible. 02 08 2004 03 11 2005 turbomachinery blades wear superalloys fatigue cracks crack-edge stress field analysis...
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Eng. Gas Turbines Power. October 2006, 128(4): 889–895.
Published Online: September 6, 2005
... that predict fatigue crack initiation life, fatigue crack growth life, fatigue limit, fatigue crack growth threshold, crack size at initiation, and fracture toughness. Using microstructure information as material input, the code is capable of predicting the average behavior and the confidence limits...
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Eng. Gas Turbines Power. July 2005, 127(3): 615–620.
Published Online: June 24, 2005
... that, in the vicinity of the disk bolt holes, the material slightly enters the plastic region of the stress-strain curve 1 . Due to these demanding test conditions, the possibility exists that fatigue cracks will develop with cycling at the six bolt hole locations, which fasten the test disk to the main shaft...
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Eng. Gas Turbines Power. April 2005, 127(2): 425–436.
Published Online: April 15, 2005
..., 2003, Paper No. 2003-GT-38659. Manuscript received by IGTI, October 2002, final revision, March 2003. Associate Editor: H. R. Simmons. 16 June 2003 01 October 2002 01 March 2003 15 04 2005 rotors condition monitoring fatigue cracks vibration measurement crack...
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Eng. Gas Turbines Power. April 2004, 126(2): 391–400.
Published Online: June 7, 2004
... results in fatigue crack initiation along the “critical” octahedral planes. A “critical plane” fatigue modeling approach was developed in the present study to analyze high cycle fatigue (HCF) failures in single crystal materials. This approach accounted for the effects of crystal orientation...
Journal Articles
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Eng. Gas Turbines Power. October 2005, 127(4): 863–868.
Published Online: March 1, 2004
... from service of the serious-corrosive discs to assure the structural integrity of this aeroengine. 01 10 2003 01 03 2004 aerospace engines life testing gas turbines vibrations crack detection fatigue cracks corrosion fatigue blades The turbine blades of an aero-engine...
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Eng. Gas Turbines Power. January 2003, 125(1): 246–251.
Published Online: December 27, 2002
... Properties in Alpha+Beta Titanium Alloys ,” Mater. Sci. Eng., A , 243 , pp. 89 – 96 . Petit, J., Mendez, J., Berata, W., Legendre, L., and Muller, C., 1992, “Influence of Environment on the Propagation of Short Fatigue Cracks in a Titanium Alloy,” Short Fatigue Cracks , edited by K. J. Miller and E...