The performance characteristics of metal matrix composites (MMCs) and the need to study their fretting fatigue wear during service are discussed. Four main elements MMCs (aluminum, copper, titanium, iron, magnesium, nickel, etc.) These factors influencing fatigue, mechanism research, life prediction, development process protection methods, respectively. Factors such as internal crack nucleation...

Torsional fretting behavior of TC4 titanium alloy has been investigated at different parameters to explore the wear resistance and mechanisms alloy. The loops, dissipated friction energy torque under normal load (100N 200N), angular displacement (±0.5° ±2°) frequency (10Hz 15Hz) were studied reveal mechanical during fretting. Results showed that made difference in while was most important facto...

It has been long understood that fretting differs from sliding wear in the relative displacement between bodies is generally smaller than size of contact them, with debris ejection thus playing an important role behaviour fretting. Whilst these ideas were clearly articulated more 30 years ago via Godet's third-body approach and Berthier's concept tribology circuit , calculation rates have conti...

The number of revision total hip arthroplasties is predicted to more than double in USA over the next 25 years from an estimated 40800 in 2005 to approximately 96700 in 2030 [1]. Modular femoral stems offer the advantage of adjustment and restoration of joint kinematics including leg length, femoral version and offset, regardless of the exact position of the distal part of the stem [2]. Disadva...

In a previous investigation, greases with two different thickeners, namely lithium complex (LiX) and polypropylene (PP), three base oil viscosities were investigated in fretting varying displacement amplitude, applied normal load material combination. The tribological behavior of grease is extremely complex. Very lubrication effects found for the same type, depending on test conditions. propert...

Abstract In Fretting is an important research direction in the detection of urban underground space structure. Traditional geophones have three issues with achieving fretting field, high cost, large size and low accuracy. A signal acquisition system based on AD7177 proposed to solve above problems, which takes STM32 as design core. decision-making scheme that combines vibration sensor introduce...