Fretting fatigue mechanism of bearing cap bolted joints

2014 ◽  
Vol 85 (5) ◽  
pp. 055106 ◽  
Author(s):  
Xin Li ◽  
Zhengxing Zuo ◽  
Wenjie Qin
Keyword(s):  
Fretting Fatigue ◽  
Bolted Joints ◽  
Bearing Cap ◽  
Fatigue Mechanism

Experimental and Numerical Study on the Fretting Fatigue Mechanism of the V Type Engine

2014 ◽  
Author(s):  
Xin Li ◽  
Zhengxing Zuo ◽  
Wenjie Qin
Keyword(s):  
Finite Element ◽  
Structural Model ◽  
Numerical Study ◽  
Fretting Fatigue ◽  
Engine Block ◽  
Main Bearing ◽  
Element Analysis ◽  
Bolt Pretension ◽  
Bearing Cap ◽  
Fatigue Mechanism

Fretting fatigue is one of the typical failure forms of engine block. The aim of this study is to investigate the fretting fatigue mechanism of the V type engine and guide engine design. An experiential system was developed to simulate fretting fatigue failure under typical engine working condition. And a submodel was used in the finite element calculation to analyze contact status and stress distribution of the structural model. Through the fretting fatigue experimental observations and finite element analysis, it can be concluded that the additional rotate torque caused by bearing load and the bolt pretension load are the two main factors which affect the fretting fatigue mechanism of the V type engine. Appropriate increasing of the bolt pretension load and using extended skirt block with cross-bolted main bearings design will restrain the oscillation of the main bearing cap can be beneficial to fretting fatigue lives of the engine block.

scholarly journals On the diversity in design for different bending fretting fatigue mechanism

2019 ◽  
Vol 1 (9) ◽  
Author(s):  
Quazi Md. Zobaer Shah ◽  
Md. Asaduzzaman Chowdhury ◽  
Md. Arefin Kowser
Keyword(s):  
Fretting Fatigue ◽  
Fatigue Mechanism

Analysis of Fretting Behavior for Fasten Surface between Diesel Engine Cylinder Block and Main Bearing Cap

2012 ◽  
Vol 479-481 ◽  
pp. 986-989
Author(s):  
Wen Li ◽  
Ri Dong Liao ◽  
Zheng Xing Zuo
Keyword(s):  
Diesel Engine ◽  
Crack Initiation ◽  
Load Condition ◽  
Location Parameter ◽  
Fretting Fatigue ◽  
Cylinder Block ◽  
Main Bearing ◽  
Rotating Speed ◽  
Engine Cylinder ◽  
Bearing Cap

Fretting fatigue becomes a typical failure mode for engine cylinder block caused by the increasing of the gas pressure and rotating speed, but the mechanism of fretting fatigue under diesel engine load condition hasn’t been systematic studied. In this paper, the fretting behaviors are mainly discussed by using fretting friction work parameter W and crack initiation location parameter G.

Research and Analysis on Damage of Fretting Wear and Fretting Fatigue for Components in NPPs

2008 ◽  
Author(s):  
Dong Ning ◽  
Min Zhang ◽  
Yongchen Xie ◽  
Yinbiao He ◽  
Weida Yao
Keyword(s):  
Failure Analysis ◽  
Quantitative Relationship ◽  
Fretting Fatigue ◽  
Point Of View ◽  
Fretting Wear ◽  
Original Structure ◽  
Structural Improvement ◽  
Component Material ◽  
Fatigue Mechanism

In this paper, from the point of view of study and analysis on fretting wear and fretting fatigue mechanism of materials, the main differences between fretting fatigue and ordinary fatigue are summarized; further more, the damage reasons on a component in a NPP are analyzed and semi-quantitative relationship between fretting fatigue and ordinary fatigue for the component material is obtained to provide with referenced basis for structural improvement and failure analysis on original structure.

scholarly journals Experimental and Numerical Investigations of Fretting Fatigue Behavior for Steel Q235 Single-Lap Bolted Joints

2016 ◽  
Vol 2016 ◽  
pp. 1-10 ◽  
Author(s):  
Yazhou Xu ◽  
Zhen Sun ◽  
Yuqing Zhang
Keyword(s):  
Fatigue Crack ◽  
Fatigue Life ◽  
Crack Initiation ◽  
Failure Mode ◽  
Contact Stress ◽  
Fatigue Cracks ◽  
Fretting Fatigue ◽  
Bolted Joints ◽  
Normal Contact Stress ◽  
Normal Contact

This work aims to investigate the fretting fatigue life and failure mode of steel Q235B plates in single-lap bolted joints. Ten specimens were prepared and tested to fit theS-Ncurve. SEM (scanning electron microscope) was then employed to observe fatigue crack surfaces and identify crack initiation, crack propagation, and transient fracture zones. Moreover, a FEM model was established to simulate the stress and displacement fields. The normal contact stress, tangential contact stress, and relative slipping displacement at the critical fretting zone were used to calculate FFD values and assess fretting fatigue crack initiation sites, which were in good agreement with SEM observations. Experimental results confirmed the fretting fatigue failure mode for these specimens. It was found that the crack initiation resulted from wear regions at the contact surfaces between plates, and fretting fatigue cracks occurred at a certain distance away from hole edges. The proposed FFD-Nrelationship is an alternative approach to evaluate fretting fatigue life of steel plates in bolted joints.

scholarly journals 1126 Evaluation of Fretting Fatigue Properties on Bolted Joints in Aluminum Wheels for Heavy Vehicles

2010 ◽  
Vol 2010 (0) ◽  
pp. 1148-1149
Author(s):  
Yousuke YAMAZAKI ◽  
Taizo MAKINO ◽  
Naoshige UEKI ◽  
Toshifumi KISHI
Keyword(s):  
Fretting Fatigue ◽  
Bolted Joints ◽  
Fatigue Properties ◽  
Heavy Vehicles

Fatigue and fretting fatigue life prediction of double-lap bolted joints using continuum damage mechanics-based approach

2016 ◽  
Vol 26 (1) ◽  
pp. 162-188 ◽  
Author(s):  
Ying Sun ◽  
George Z Voyiadjis ◽  
Weiping Hu ◽  
Fei Shen ◽  
Qingchun Meng
Keyword(s):  
Fatigue Life ◽  
Fatigue Damage ◽  
Damage Mechanics ◽  
Failure Modes ◽  
Damage Model ◽  
Continuum Damage Mechanics ◽  
Fretting Fatigue ◽  
Bolted Joints ◽  
Continuum Damage ◽  
Bolted Joint

Fatigue and fretting fatigue are the main failure mode in bolted joints when subjected to cyclic load. Based on continuum damage mechanics, an elastic–plastic fatigue damage model and a fretting fatigue damage model are combined to evaluate the fatigue property of bolted joints to cover the two different failure modes arisen at two possible critical sites. The predicted fatigue lives agree well with the experimental results available in the literature. The beneficial effects of clamping force on fatigue life improvement of the bolted joint are revealed: part of the load is transmitted by friction force in the contact interface, and the stress amplitude at the critical position is decreased due to the reduction in the force transmitted by the bolt. The negative effect of fretting damage on the bolted joint is also captured in the simulation.

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