Effect of Shear Load on Fretting Fatigue Behavior of Ti-6Al-4V PDF Download
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Author: Orly Leiva
Publisher:
ISBN:
Category : Fretting corrosion
Languages : en
Pages : 294
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Book Description
Author: Orly Leiva
Publisher:
ISBN:
Category : Fretting corrosion
Languages : en
Pages : 294
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Book Description
Author: Andrew J. Jutte
Publisher:
ISBN: 9781423516101
Category : Fretting corrosion
Languages : en
Pages : 174
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Book Description
Effects of a variable contact load on the high cycle fretting fatigue behavior of Ti-6AL-4V were investigated. Experimental tests were performed using a new test setup capable of applying a contact load varying in amplitude, frequency, and phase and independently measuring shear forces on opposite sides of a specimen. Finite element analysis (FEA) of experimental and idealized loading conditions was performed and local mechanistic parameters and the Modified Shear Stress Range (MSSR) fatigue parameter were determined. Correlations between contact width, slip amplitude, fatigue life and a variable contact load were established with variable contact loading shown to have a damaging effect. Predicted values of crack location and orientation using the MSSR parameter were verified experimentally. The MSSR parameter unsuccessfully predicted fatigue life for variable contact loads. A new formulation of the MSSR parameter is proposed.
Author: Abdulla Al-Noaimi
Publisher:
ISBN:
Category : Axial loads
Languages : en
Pages : 276
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Book Description
Author: Mohammad Almajali
Publisher:
ISBN:
Category : Axial loads
Languages : en
Pages : 292
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Book Description
Author: Rihong Wang
Publisher:
ISBN:
Category : Fretting corrosion
Languages : en
Pages : 306
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Book Description
Author: H. Lee
Publisher:
ISBN:
Category : Crack initiation parameter
Languages : en
Pages : 16
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Book Description
Relaxation behavior of residual stress and its effect on fretting fatigue response of shot-peened titanium alloy, Ti-6A1-4V were investigated at room and elevated temperatures under constant amplitude cycling condition using two contact configurations, cylinder on flat and flat on flat. Measurements by X-ray diffraction method before and after tests showed that residual compressive stress relaxed during fretting fatigue. Fretting fatigue life depended on the amount of stress relaxation as well as on the applied stress range. Elevated temperature induced more residual stress relaxation relative to that at room temperature, which, in turn, resulted in a reduction of fretting fatigue life. There was no effect of contact geometry on fretting fatigue life on the basis of the applied cyclic stress on the specimen, which did not account for any effects from contact stresses, even though less residual stress relaxation occurred with flat pad. A critical plane based fatigue crack initiation model, modified shear stress range parameter (MSSR), was computed from finite element analysis for tests incorporating various levels of stress relaxation. It showed that not only crack initiation but also crack propagation should be considered to characterize fretting fatigue behavior of shot-peened specimens.
Author: SE. Kinyon
Publisher:
ISBN:
Category : Contact mechanics
Languages : en
Pages : 16
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Book Description
An investigation was performed to determine the effects of spectrum loading on the fretting fatigue life of titanium alloy Ti-6Al-4V. The research program consisted of a 10 Hz spectrum load cycle applied at six conditions of interest with a normal pressure of 31 MPa. Baseline tests were performed at three stress levels, 345, 310, and 286 MPa maximum load using a conventional haversine waveform. Tests were performed using a spectrum load waveform consisting of 2 cycles, one at 345 MPa, followed by another at 310 MPa, repeated to failure. Additional tests were performed using 345 and 286 MPa. The final condition of interest was investigated using a 345/310/286 MPa waveform. Miners rale was applied to each of the spectrum load cases to test the hypothesis that the titanium alloy followed Miners Rule under the loading conditions. The three conditions of interest varied from Miners Rule by 23, 47, and 62%. From these results it was concluded that Miners Rule was insufficient to predict failure lives of Ti-6Al-4V in fretting fatigue.
Author: David W. Hoeppner
Publisher: ASTM International
ISBN: 0803128517
Category : Contact mechanics
Languages : en
Pages : 554
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Book Description
This volume includes 36 of the 40 papers presented at the symposium, and a collection of six keynote papers providing background on the subject. Topics covered include parameter effects, environmental effects, crack nucleation, material and microstructural effects, damage analysis, fracture mechanic
Author: Tomasz Liskiewicz
Publisher: Elsevier
ISBN: 0128240970
Category : Technology & Engineering
Languages : en
Pages : 656
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Book Description
Fretting Wear and Fretting Fatigue: Fundamental Principles and Applications takes a combined mechanics and materials approach, providing readers with a fundamental understanding of fretting phenomena, related modeling and experimentation techniques, methods for mitigation, and robust examples of practical applications across an array of engineering disciplines. Sections cover the underpinning theories of fretting wear and fretting fatigue, delve into experimentation and modeling methods, and cover a broad array of applications of fretting fatigue and fretting wear, looking at its impacts in medical implants, suspension ropes, bearings, heating exchangers, electrical connectors, and more. Covers theoretical fundamentals, modeling and experimentation techniques, and applications of fretting wear and fatigue Takes a combined mechanics and materials approach Discusses the differences and similarities between fretting wear and fretting fatigue as well as combined experimental and modeling methods Covers applications including medical implants, heat exchangers, bearings, automotive components, gas turbines, and more
Author: C. Lutynski
Publisher:
ISBN:
Category : Fretting
Languages : en
Pages : 15
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Book Description
A study of the fretting fatigue process in sheet specimens of Ti-6Al-4V alloy has been carried out. In the fretting experiments two fretting pads, also of Ti-6Al-4V, were clamped to the fatigue specimen by a calibrated proving ring. In the experiments the fretting pressure and the fatigue stress amplitude were varied. Specimens in the as-received condition as well as shot-peened specimens were tested to study the effect of surface condition on resistance to fretting. An approximate analysis of the shear transfer process was developed, and predictions are compared with the measured size of the fretting scars. The fatigue results of this investigation are discussed in terms of test variables as well as the predictions of the approximate theoretical treatment.
