Peak contact pressure, cyclic stress amplitudes, contact semi-width and slip amplitude: relative effects on fretting fatigue life

2001 ◽  
Vol 23 (3) ◽  
pp. 193-206 ◽  
Author(s):  
K Iyer
Keyword(s):  
Fatigue Life ◽  
Contact Pressure ◽  
Fretting Fatigue ◽  
Cyclic Stress ◽  
Peak Contact Pressure

Fretting fatigue behavior and failure characteristics of 35CrMoA steel under elliptical loading path

2021 ◽  
Vol 73 (6) ◽  
pp. 922-928
Author(s):  
Ziao Huang ◽  
Xiaoshan Liu ◽  
Guoqiu He ◽  
Zhiqiang Zhou ◽  
Bin Ge ◽  
...  
Keyword(s):  
Fatigue Life ◽  
Contact Pressure ◽  
Wear Debris ◽  
Stress Amplitude ◽  
Fatigue Behavior ◽  
Fretting Fatigue ◽  
Cyclic Stress ◽  
Loading Path ◽  
Fatigue Wear ◽  
Content Type

Purpose This study aims to understand the multiaxial fretting fatigue, wear and fracture characteristics of 35CrMoA steel under the elliptical loading path. Design/methodology/approach By keeping the contact pressure and torsional shear cyclic stress amplitude unchanged; the axial cyclic stress amplitude varied from 650 MPa to 850 MPa. The fretting fatigue test was carried out on MTS809 testing machine, and the axial cyclic strain response and fatigue life of the material were analyzed. The fretting zone and fracture surface morphology were observed by scanning electron microscope. The composition of wear debris was detected by energy dispersive X-ray spectrometer. Findings In this study, with the increase of axial stress amplitude, 35CrMoA steel will be continuously softened, and the cyclic softening degree increases. The fretting fatigue life decreases unevenly. The fretting scars in the stick region are elongated in the axial direction. The area of fracture crack propagation zone decreases. In addition, the results indicate that wear debris in the slip region is spherical and has higher oxygen content. Originality/value There were few literatures about the multiaxial fretting fatigue behavior of 35CrMoA steel, and most scholars focused on the contact pressure. This paper reveals the effect of axial cyclic stress on fretting fatigue and wear of 35CrMoA steel under the elliptical loading path.

Effect of Contact Pressure and Cyclic Stress Amplitude on Fretting Fatigue of 45-Carbon Steel

2007 ◽  
Vol 353-358 ◽  
pp. 134-137
Author(s):  
Wei Ming Sun ◽  
Shui Sheng Chen ◽  
Li Qun Tu
Keyword(s):  
Fatigue Life ◽  
Carbon Steel ◽  
Contact Pressure ◽  
Main Crack ◽  
Stress Amplitude ◽  
Fretting Fatigue ◽  
Cyclic Stress ◽  
Outer Edge ◽  
Middle Portion ◽  
Contact Pressures

The effect of contact pressure on fretting fatigue in quenched and tempered 45-carbon steel is studied. With an increase in contact pressure, fretting fatigue life is decreased quickly at low contact pressures; however it almost unchanged at high contact pressures. With an increase in cyclic stress amplitude, fretting fatigue life decreased. In the test, concavity is formed at the fretted area accompanying wear. The main crack is initiated at the outer edge corner of the concavity at high contact pressures, and initiated at the middle portion of the fretted area at low contact pressures.

Numerical Analysis of the Effect of Contact Pressure on the Fretting Fatigue Life in a Press-Fitted Shaft

2009 ◽  
Vol 54 (3) ◽  
pp. 1115-1118 ◽  
Author(s):  
Dong-Hyong Lee ◽  
Seok-Jin Kwon ◽  
Won-Hee You ◽  
Jae-Boong Choi ◽  
Young-Jin Kim
Keyword(s):  
Fatigue Life ◽  
Numerical Analysis ◽  
Contact Pressure ◽  
Fretting Fatigue

Analyses of Contact Pressure and Stress Amplitude Effects on Fretting Fatigue Life

2000 ◽  
Vol 123 (1) ◽  
pp. 85-93 ◽  
Author(s):  
K. Iyer ◽  
S. Mall
Keyword(s):  
Finite Element ◽  
Fatigue Life ◽  
Contact Pressure ◽  
Stress Amplitude ◽  
Normal Load ◽  
Contact Region ◽  
Local Stress ◽  
Fretting Fatigue ◽  
Element Analysis ◽  
Stress Ratios

Elastic-plastic finite element analyses of a cylinder-on-plate configuration, studied experimentally, were performed to provide an explanation for the decrease in fretting fatigue life with increasing contact pressure. Three values of normal load, namely 1338 N, 2230 N, and 3567 N, and three stress ratios (0.1, 0.5, and 0.7) were considered. Based on a previously determined dependency between contact pressure and friction coefficient, the effect of coefficient of friction was also evaluated. The deformation remained elastic under all conditions examined. Cyclic, interfacial stresses, and slips were analyzed in detail. The amplification of remotely applied cyclic stress in the contact region is shown to provide a rationale for the effect of contact pressure and stress amplitude on life. Comparisons with previous experiments indicate that the local stress range computed from finite element analysis may be sufficient for predicting fretting fatigue life. Further, the results suggest that the slip amplitude and shear traction may be neglected for this purpose.

EFFECT OF CONTACT PRESSURE ON FRETTING FATIGUE BEHAVIOR UNDER CYCLIC CONTACT LOADING

2017 ◽  
Vol 24 (Supp02) ◽  
pp. 1850032
Author(s):  
F. ABBASI ◽  
G. H. MAJZOOBI
Keyword(s):  
Fatigue Life ◽  
Contact Pressure ◽  
High Cycle Fatigue ◽  
Fe Simulation ◽  
Fatigue Behavior ◽  
Fretting Fatigue ◽  
Contact Load ◽  
Normal Contact ◽  
Contact Loading ◽  
Crack Initiation Life

In this study, the effect of contact pressure on fretting fatigue behavior of Al7075-T6 under cyclic normal contact loading is investigated. It is found that fretting fatigue life for the case of cyclic contact load was significantly less than that for constant contact load at the same axial and contact load levels, particularly for High Cycle Fatigue (HCF) conditions. The results showed that the fretting fatigue life decreased monotonically with the increase in normal contact load for all axial stresses. Examination of the fretting scars was performed using optical microscopy and numerical simulation was carried out using commercial finite element (FE) codes ABAQUS[Formula: see text] and FRANC2D/L[Formula: see text] to calculate the crack propagation life. The crack initiation life was calculated by a combination of numerical and experimental results. Finally, the FE simulation was validated by a comparison between the numerical crack growth rate and the experimental measurement using replica.

Numerical estimation of fretting fatigue life of bolted joints using continuum damage mechanics and SEAM Tool

2020 ◽  
Vol 23 (11) ◽  
pp. 2486-2499
Author(s):  
Xinhao Lin ◽  
Yazhou Xu ◽  
Hui Zhang ◽  
Qianqian Ren ◽  
Junqi Yu
Keyword(s):  
Fatigue Life ◽  
Damage Mechanics ◽  
Continuum Damage Mechanics ◽  
Fretting Fatigue ◽  
Cyclic Stress ◽  
Initial Crack ◽  
Bolted Joints ◽  
Propagation Path ◽  
Continuum Damage ◽  
Tightening Torque

For fretting fatigue, micro-slipping often causes initial micro-cracks in the contact surfaces, which gradually propagate and eventually result in fracture failure. However, it is difficult to directly observe and measure the crack initiation and propagation processes of single-lap bolted joints due to the obstacle of testing technique. Therefore, this article presents an elastic analysis–based method, in which the total fretting fatigue lifetime is divided into initiation life predicted by continuum damage mechanics and propagation life calculated by SEAM Tool in combination with Paris’s law. Since the initiation life model implicitly reflects the result of damage process, one can directly calculate the initiation life based on the elastic stress analysis. The predicted fretting fatigue life, initial crack location, and propagation path are in reasonable agreement with the fretting fatigue test and scanning electron microscope observation results. In addition, it is found that among the main factors affecting fretting fatigue of steel single-lap bolted joints, the initial life is affected by cyclic stress, friction coefficient, and tightening torque, and the propagation path is mainly influenced by tightening torque.

Fatigue Life Evaluation of Press-Fitted Specimens by Using Multiaxial Fatigue Theory at Contact Edge

2005 ◽  
Vol 297-300 ◽  
pp. 108-114 ◽  
Author(s):  
Dong Hyung Lee ◽  
Byeong Choon Goo ◽  
Chan Woo Lee ◽  
Jae Boong Choi ◽  
Young Jin Kim
Keyword(s):  
Fatigue Life ◽  
Crack Initiation ◽  
Fatigue Crack Initiation ◽  
Fretting Fatigue ◽  
Cyclic Stress ◽  
Multiaxial Fatigue ◽  
Critical Plane ◽  
Bending Load ◽  
The Press ◽  
Number Of Cycles

In the shrink or press-fitted shafts such as railway axles, fretting can occur by cyclic stress and micro-slippage due to local movement between shaft and boss. When the fretting occurs in the press-fitted shaft, the fatigue strength remarkably decreases compared with that of without fretting. In this paper fretting fatigue life of press-fitted specimens was evaluated using multiaxial fatigue criteria based on critical plane approaches. An elastic-plastic analysis of contact stresses in a press-fitted shaft in contact with a boss was conducted by finite element method and micro-slip due to the bending load was analyzed. The number of cycles of fretting fatigue and the crack orientation were compared with the experimental results obtained by rotating bending tests. It is found that the crack initiation of fretting fatigue between shaft and boss occurs at the contact edge and the normal stress on the critical plane of contact interface was an important parameter for fretting fatigue crack initiation. Furthermore, the results indicated that a critical plane parameter could predict the orientation of crack initiation in the press-fitted shaft.

Effects of Contact Pressure on Fretting Fatigue Characteristics of Ti-4.5Al-3V-2Mo-2Fe with Acicular Alpha Structure

2005 ◽  
Vol 475-479 ◽  
pp. 585-588
Author(s):  
Junji Takeda ◽  
Mitsuo Niinomi ◽  
Toshikazu Akahori
Keyword(s):  
Fatigue Life ◽  
Fatigue Strength ◽  
Contact Pressure ◽  
High Cycle Fatigue ◽  
Fretting Fatigue ◽  
Fatigue Tests ◽  
Cycle Fatigue ◽  
High Fatigue ◽  
Fatigue Characteristics ◽  
Contact Pressures

The effects of microstructure and contact pressure on fretting fatigue characteristics of Ti-4.5Al-3V-2Mo-2Fe conducted with annealing at 1123 K and 1223 K were investigated in this study. Fretting fatigue tests in low and high cycle fatigue life regions of the alloys with equiaxed α and acicular α structures were carried out at each contact pressure of 10, 15, 30, 45, 75, 105 and 153 MPa. In the alloy with equiaxed α structure, fretting fatigue strength tends to be very low at contact pressures of 10 MPa and 15 MPa in low and high cycle fatigue life regions, respectively. Furthermore, fretting fatigue strength tends to be nearly constant at the contact pressure over 45 MPa in each fatigue life region. On the other hand, in the alloy with acicular α structure, fretting fatigue strength tends to be very low at contact pressures of 15 MPa and 30 MPa in low and high cycle fatigue life regions, respectively. Furthermore, fretting fatigue strength tends to be nearly constant at contact pressures of 45 MPa and over 30 MPa in low and high fatigue life regions, respectively.

Sign in / Sign up

Export Citation Format

Share Document