Download or read book Effect of Contact Pressure on Fretting Fatigue in Type 316L Stainless Steel written by K. Nakazawa and published by . This book was released on 2003 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effect of contact pressure on fretting fatigue in solution-treated austenitic stainless steel was studied under load control at a stress amplitude of 180 MPa and a stress ratio of 0.1. With an increase in contact pressure, fretting fatigue life was almost unchanged at contact pressures between 15 and 45 MPa, but it decreased drastically at contact pressures beyond 60 MPa. Frictional stress amplitude at the fretted area increased smoothly with contact pressure. It was impossible to explain the contact pressure dependence of life by the change in frictional stress amplitude. At low contact pressures, stress concentration due to fretting damage occurred at the middle portion of fretted area and the main crack responsible for failure was initiated there. At high contact pressures, deep concavity associated with plastic deformation of the specimen under the contact of fretting pad was formed without accompanying heavy wear. The main crack was initiated at the outer edge corner of the concavity which probably acted as a notch. It was suggested that the stress concentration at the concavity edge corner played an important role in fretting fatigue at high contact pressures.
Download or read book Fretting Fatigue written by Steven E. Kinyon and published by ASTM International. This book was released on 2003 with total page 445 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contains 29 contributions drawn from the Third International Symposium on Fretting Fatigue held in Nagaoka, Japan in May 2001. Sections of the volume address fretting wear and crack initiation; fretting fatigue crack and damage; life prediction; fretting fatigue parameter effects; loading condition
Download or read book Effect of Contact Pressure on Fretting Fatigue of High Strength Steel and Titanium Alloy written by N. Maruyama and published by . This book was released on 1992 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effect of contact pressure on fretting fatigue behavior has been studied using a high strength steel and a Ti-6Al-4V alloy. In steel, at higher stress amplitude, the fretting fatigue life decreased monotonously with increasing contact pressure. At lower stress amplitude, it exhibited a minimum at a low contact pressure and a maximum at an intermediate contact pressure, then decreased again and became constant at high contact pressures. The fretting fatigue strength at 107 cycles was high at an intermediate contact pressure. In titanium alloy, the fretting fatigue life showed a similar contact pressure dependence. The frictional force increased monotonously with increasing contact pressure. The initiation site of the main crack depended on the contact pressure and had a close relation to the width of stick region at the fretted area. The contact pressure dependence was discussed in terms of stress concentration at the fretted area.
Download or read book Effect of Contact Pad Geometry on Fretting Fatigue Behavior of High Strength Steel written by Y. Ochi and published by . This book was released on 2003 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effect of contact pad geometry on fretting fatigue behavior of high strength steel was examined by using the clamping double bridge pads system. In order to investigate the effects of bridge pad shapes, the fretting fatigue tests were carried out by using four types of bridge pad with different leg height h*. The fretting fatigue strength decreased with decreasing in the h*. Also, the stick area increased as increasing of the h*. The contact pressure distribution was measured by strain gauge and calculated by using a finite element method in order to investigate the effect of the pads leg height h*. The contact pressure concentrated in the inside on the contact surface where the main crack initiated. Two-stage tests were carried out in order to investigate the fretting fatigue damage. The two-stage test was performed to a certain cycles under fretting condition and then plain tests without fretting as removing the pads were continued.
Download or read book The Effect of Contact Geometry on Fretting Fatigue written by Graham Roberts and published by . This book was released on 1975 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: Some recent research literature has proposed that the initiation of fatigue cracks under fretting conditions is largely dependent on the local macroscopic stress distribution in the contact area. The work reported herein is an.
Download or read book Influence of Fretting on Flexural Fatigue of 304 Stainless Steel and Mild Steel written by Robert C. Bill and published by . This book was released on 1978 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the Institute of Marine Engineering Science and Technology written by and published by . This book was released on 2003 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Metals for Biomedical Devices written by Mitsuo Niinomi and published by Woodhead Publishing. This book was released on 2019-05-17 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metals for Biomedical Devices, Second Edition, has been fully updated and builds upon the success of its first edition, discussing the latest techniques in metal processing methods and the behavior of this important material. Initial chapters review the current status and selection of metals for biomedical devices. Subsequent chapters cover mechanical behavior, degradation and testing, corrosion, wear testing and biocompatibility, the processing of metals for biomedical applications, including topics such as forging metals and alloys, surface treatment, coatings and sterilization. Chapters in the final section discuss the clinical applications of metals, such as cardiovascular, orthopedic and new generation biomaterials. With its distinguished editor and team of expert contributors, this book is a standard reference for materials scientists, researchers and engineers working in the medical devices industry and academia. - Reviews the latest techniques in metal processing methods, including surface treatment and sterilization - Examines metal selection for biomedical devices, considering the biocompatibility of various metals - Assesses mechanical behavior and the testing of metals, featuring the latest information on corrosion, fatigue and wear - Discusses biodegradable alloys, including a new section on Mg alloys - Includes a new section that discusses the use of additive manufacturing in the production of medical devices
Download or read book Determination and Control of Contact Pressure Distribution in Fretting Fatigue written by K. Sato and published by . This book was released on 1992 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contact pressure is one of the most important factors in fretting fatigue. The contact pressure distribution on loading of applied cyclic stress is markedly different from that on unloading. To elucidate the effect of contact pressure on fretting fatigue strength, the contact pressure distribution should be exactly determined. In this paper, the contact pressure distribution was calculated by using a boundary element method and monitored by an experimental method of caustics. Differences in the contact pressure distribution between the shapes of fretting bridges whose height is 10, 15, 20, and 30 mm at a constant span of 30 mm, and between two types of clamping, which are center clamping and edge clamping at the back face of the bridge, were analyzed. In order to examine the effect of the contact pressure distribution on the fretting fatigue strength, fretting fatigue tests in plane bending were carried out. The S-N properties obtained from fretting fatigue tests could be estimated analytically by equivalent stress amplitude.
Download or read book Influence of Fretting on Flexural Fatigue of 304 Stainless Steel and Mild Steel written by Robert C. Bill and published by . This book was released on 1978 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fretting fatigue experiments conducted on 304 stainless steel using a flexural-fatigue test arrangement with bolted-on fretting pads have demonstrated that fatigue life is reduced by at least a factor of 10 in the 265- to 334-MPa (38,500- to 48,500-psi) nominal-flexural-fatigue-stress range. In addition, experiments in which the fretting pads were removed after selected numbers of cycles, followed by continued flexural fatigue without fretting show that continued fretting beyond 50,000 cycles does not significantly further reduce fatigue life of 304 stainless steel at 317 MPa (46,000 psi). Microscopic examination of the fretted contact areas revealed fracture initiation sites as well as numerous cracks that did not propagate to failure. Flexural fretting fatigue experiments performed on mild steel showed an insensitivity of fatigue life to the incidence of fretting under flexural stress conditions of from 162 to 217 MPa (23,500 to 31,500 psi).
Download or read book Effects of Laser Peening on Fretting Fatigue of Ti 6Al 4V and Hydrogen Permeation of 316L Stainless Steel Coupons written by Kuo-Shu Liu and published by . This book was released on 2006 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Contact Load and Contact Curvature Radius of Cylinder Pad on Fretting Fatigue in High Strength Steel written by M. Sumita and published by . This book was released on 2000 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fretting fatigue of high strength steel was studied at various contact loads using bridge-type fretting cylindrical pads with various contact curvature radii. The fretting fatigue life showed a minimum at a certain contact load irrespective of the pad radius even though the frictional force increased monotonously with contact load. At a high contact load, the fretting fatigue life remained almost unchanged with a change in pad radius. At a low contact load, however, the fretting fatigue life increased with an increase in pad radius even though the frictional force was independent of the radius.
Download or read book The Effect of the Contact Conditions and Surface Treatments on the Fretting Fatigue Strength of Medium Carbon Steel written by K. Tsutsui and published by . This book was released on 2000 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fretting fatigue tests characterized with employing a contact bridge pad clamped to a fatigue specimen were conducted to find the effect of shapes of contact pads. The shapes of the contact edge of the pad used in the test were sharp and round. The relative slip amplitude during fatigue testing was measured and the effect of the location of the displacement sensor was discussed with the result of the stress analysis around the contact area. The effect of molybdenum coating on the fretting fatigue strength was also investigated.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1983 with total page 1368 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Multitechnique Studies on Fretting Fatigue Influence of Surface Treatment written by Harro Sander and published by . This book was released on 1986 with total page 69 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the experimental program a specially constructed apparatus was used to simulate conditions at the faying surfaces in a structural joint. Fretting fatigue tests were carried out on 34 Chromium Nickel Molybdenum 6/100Cr6 steels using stress ratios from the range of finite endurance. Two methods of surface treatments are used: polishing and shaping. Two directions of each surface treatment are considered: parallel and perpendicular to the sliding direction. The results are compared to baseline tests on the same material without fretting and are discussed in terms of the effect of surface roughness and normal force. Keywords: fatigue cracks, contact pressure, contact resistance, contact temperature, normal force, friction force, linear wear rate, shear stress, crack detection, magnetic induction.
Download or read book Fretting Fatigue of a Medium Carbon Steel written by D. J. Duquette and published by . This book was released on 1979 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contacting metal surfaces subjected to pressure and relative motion suffer from a phenomenon known as fretting corrosion. When one of the two surfaces is also subjected to cyclic stress this phenomenon can lead to premature fatigue crack initiation and is known as fretting fatigue. Important variables in this process are the magnitude of relative displacement, contact pressure, frequency, relative hardness of contacting surfaces, intrinsic fatigue resistance and possibly environment and temperature. (Author).
Download or read book A Study of the Fretting Fatigue of Type 304 Stainless Steel at Room and Elevated Temperatures written by Gary Andrew Simansky and published by . This book was released on 1978 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
