Fatigue analysis of spherical contact subjected to cyclic elastic-plastic normal loading

2021 ◽  
pp. 1-20
Author(s):  
Zhou Chen ◽  
Yibo Jiang ◽  
Zheming Tong ◽  
Shuiguang Tong ◽  
Jianrong Tan
Keyword(s):  
Rough Surface ◽  
Fatigue Damage ◽  
Contact Fatigue ◽  
Future Research ◽  
Research Directions ◽  
Normal Loading ◽  
Elastic Plastic ◽  
Surface Fatigue ◽  
Future Research Directions ◽  
Maximum Contact

Abstract Surface fatigue resulting from cyclic contact loading is a main reason for the rough surface wear. Since a rough surface consists of many asperities, the fatigue in one asperity is investigated. The multiaxial Fatemi-Socie fatigue criterion is adopted to study the contact fatigue in a spherical asperity subjected to cyclic elastic-plastic normal loading. The fatigue damage in the asperity is predicted. The maximum fatigue damage occurs at the edge of the maximum contact area. Two typical patterns are found for the fatigue damage distribution. Locations and orientations of fatigue microcrack initiation are also identified. Finally, future research directions are discussed.

scholarly journals Fatigue Damage of an Asperity in Frictionless Normal Contact with a Rigid Flat

Metals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 545
Author(s):  
Zhou Chen ◽  
Yibo Jiang ◽  
Zheming Tong ◽  
Shuiguang Tong
Keyword(s):  
Fatigue Damage ◽  
Element Model ◽  
Fatigue Wear ◽  
Research Directions ◽  
Normal Loading ◽  
Normal Contact ◽  
Slowing Down ◽  
Surface Fatigue ◽  
Severe Fatigue ◽  
Elastic Shakedown

Surface fatigue wear widely exists, and it occurs as long as a sufficient number of loading–unloading cycles are applied. Slowing down surface fatigue wear requires understanding the evolution of fatigue damage in the surface. Real surfaces are composed of many asperities; therefore, it is important to study the fatigue damage of a single asperity. A finite element model of an asperity subjected to cyclic elastic–plastic normal loading was developed under frictionless contact condition. The asperity can be either completely or partially unloaded in a loading cycle. For the sake of completeness, both cases were investigated in the present study. The multiaxial Fatemi-Socie fatigue criterion was adopted to evaluate the fatigue damage of the asperity in elastic shakedown state, which was achieved after several loading cycles. For the case of complete unloading, severe fatigue damage was confined in a subsurface ridge starting from the edge of the maximum loaded contact area. The shape and volume of the wear particles were predicted based on a fundamentally valid assumption. For the case of partial unloading, the fatigue damage was much milder. Finally, potential research directions to expand the current study are suggested.

Developing Management from Islamic Perspectives (MIP) as a Formal Academic Discipline

2009 ◽  
Vol 26 (1) ◽  
pp. 46-69
Author(s):  
Shamas-Ur-Rehman Toor
Keyword(s):  
Literature Review ◽  
Academic Discipline ◽  
Real Life ◽  
Growth Potential ◽  
Future Research ◽  
Business Practices ◽  
Research Directions ◽  
International Consortium ◽  
Future Research Directions ◽  
Scholarly Attention

Management from Islamic Perspectives (MIP) is an emerging field that has begun to attract scholarly attention. However, the research undertaken so far has been rather fragmented and lack a clear agenda. This paper presents a literature review of the field and the areas of current focus. Although the field has a huge growth potential, I argue that it faces several challenges and problems as it develops further. I outline these potential pitfalls, suggest how to develop MIP as a formal discipline, and explain how to integrate it within real-life business practices. The article closes with a call for research to be conducted in a more organized fashion through an international consortium of researchers as well as recommendations for future research directions.

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