... Voronoi tessellations wherein each cell represents a material grain and the boundaries between them constitute the weak planes in the material. Fatigue cracks initiate on the weak planes where oscillating shear stresses are the strongest. Finite element analysis is performed to determine the magnitude...

... stress levels; different input parameters considered, using design of experiments techniques; and statistically processed results. 10 09 2010 08 04 2011 07 07 2011 07 07 2011 brittleness design of experiments discs (structures) fatigue cracks finite element analysis...

...Trevor S. Slack; Nihar Raje; Farshid Sadeghi; Gary Doll; Michael R. Hoeprich Inclusions are common in bearing materials and are a primary site for subsurface fatigue crack initiation in rolling element bearings. This paper presents a new approach for computing the pressure, film thickness...

... friction finite element analysis braking fatigue cracks yield strength stress analysis transient stress analysis heat flux coupling thermal fatigue fracture frictional heat disk brakes Reliable and effective braking is an important prerequisite of safe transportation. The disk brake...

...Nihar Raje; Farshid Sadeghi; Richard G. Rateick, Jr.; Michael R. Hoeprich Inclusions are the primary sites for subsurface fatigue crack initiation in bearing contacts. To understand the mechanisms of subsurface crack nucleation under contact loading, a detailed description of the stress field...

... in Microstructurally Short Fatigue Crack Growth Rates ,” ASME J. Eng. Mater. Technol. 0094-4289 , 119 , pp. 171 – 179 . Bassani , J. L. , 1992 , “ Plastic Flow of Crystals ,” Adv. Appl. Mech. 0065-2156 , 30 , pp. 191 – 254 . Huang , Y. , 1991 , “ A User-Material Subroutine...

... of the contact pressure, stress intensity factors, and maximum equivalent plastic strain. It is shown that a transition from tensile to shear dominant mode of fatigue crack growth occurs as the crack tip approaches the interface, resulting in further crack growth almost parallel to the layer interface...

... results, and its application was demonstrated by fatigue crack growth results obtained for a graphite substrate coated with a pyrolitic carbon layer. 6) The effect of the initial crack length on the plastic deformation in the elastic-plastic second layer is negligible because the crack-tip stresses...

... Rolling Contact Fatigue Tester,” J. J. C. Hoo, ed., ASTM STP 771, pp. 107–124. Cheng , W. , Cheng , H. S. , and Keer , L. M. , 1994 , “ Experimental Investigationon Rolling/Sliding Contact Fatigue Crack Initiation with Artificial Defects ,” Tribol. Trans. , 37 , pp. 1 – 12...

.... , and Pradier , H. , 1996 , “ Rail Rolling Contact Fatigue Research by the European Rail Research Institute ,” Wear , 191 , pp. 1 – 13 . Bogdan’ski , S. , Olzak , M. , and Stupnicki , J. , 1996 , “ Numerical Stress Analysis of Rail Rolling Contact Fatigue Cracks ,” Wear , 191 , pp...

...-dimensional interface element was developed to model the constitutive laws of the interface. The results demonstrated the capability of the model to predict the conditions under which small fretting-induced fatigue cracks are arrested. The model was validated by predicting the S-N curves produced...

... on the combination of the author’s RCF model, Hourlier and Pineau’s criterion for the branch prediction and experimental data and the corresponding models for fatigue crack extension that are derived from a Joint European project. Parametric studies on the influence of (i) residual stresses, (ii) both interfacial...

... friction mechanical contact protective coatings fatigue cracks titanium compounds nitrogen compounds failure (mechanical) The useful lives of rolling bearings and gears are often limited by rolling contact fatigue (RCF) failures. The formation of RCF pits on surfaces subjected to cyclic...

... received December 8, 2000. Associate Editor: T. N. Farris. 12 January 1999 08 December 2000 fatigue cracks life testing machine testing mechanical engineering The fatigue life of a riveted lap joint is governed by a number of processes including the initiation of cracks...

... service conditions. Fatigue cracks and delamination developed in bearings tested in a knee simulator and in rolling/sliding test specimens, and the damage was similar to that found in retrieved tibial bearings. The fatigue cracks invariably initiated in the embrittled oxidized layer, and the depth...