Determine the Fatigue behavior of engine damper caps screw bolt

In this paper, fatigue strength of the engine damper cap screw bolt is determined. Engine damper cap screw is critical fastener. Critical fastener is a term used to describe a cap screw that, upon failure, causes immediate engine shutdown or possible harm to person. So, determination of fatigue strength is important. S-N method is used for cap screw fatigue strength determination by testing number of samples at different alternating load keeping mean load constant. Alternating load is increased until cap screws begin to fail. But for measurement of axial load in fasteners, ultrasonic bolt gauging method is used. It has been observed that fatigue failure takes place on the thread of cap screw bolt due to high stress concentration on the thread.

[1]  Hua-Pen Zhao.  The virtual contact loading method for contact problems considering material and geometric nonlinearities , 1996 .

[2]  Joseph Edward Shigley,et al.  Mechanical engineering design , 1972 .

[3]  J. N. Goodier.  The Distribution of Load on the Threads of Screws , 1940 .

[4]  Shun-Fa Hwang,et al.  Failure analysis of bolts on an end flange of a steam pipe , 2006 .

[5]  A. U. De Koning,et al.  Stress Intensity Factor Solutions for Fasteners in NASGRO 3.0 , 2000 .

[6]  Michihiko Tanaka,et al.  Application of the Finite Element Method to Bolt-nut Joints : Fundamental Studies on Analysis of Bolt-nut Joints using the Finite Element Method , 1981 .

[7]  W. D. Dover,et al.  Stress analysis of drillstring threaded connections using the finite element method , 1993 .

[8]  Evans F. Osaisai.  International Journal of Computational Engineering Research(IJCER) , 2013 .

[9]  Gholam Hossein Farrahi,et al.  Experimental evaluation of the effect of thread pitch on fatigue life of bolts , 2005 .

[10]  Shin-Ichi Nishida.  Failure analysis in engineering applications , 1992 .

[11]  B. Kenny,et al.  Load and stress distribution in screw threads , 1985 .

[12]  Volnei Tita,et al.  Failure analysis of a SAE 4340 steel locking bolt , 2004 .

[13]  Robert D. Cook,et al.  Modelling the load transfer in threaded connections by the finite element method , 1979 .

[14]  Roy G. Baggerly,et al.  Hydrogen-assisted stress cracking of high-strength wheel bolts , 1996 .

[15]  Walter D. Pilkey.  Peterson's Stress Concentration Factors , 1997 .

[16]  D. G. Sopwith.  The Distribution of Load in Screw Threads , 1948 .

[17]  Roger Rabb.  Fatigue failure of a connecting rod , 1996 .

[18]  Zhao Hua,et al.  Analysis of the load distribution in a bolt-nut connector , 1994 .

[19]  J. Toribio,et al.  Stress intensity factor solutions for a cracked bolt under tension, bending and residual stress loading , 1991 .

[20]  H Fessler,et al.  Stresses in a bottoming stud assembly with chamfers at the ends of the threads , 1983 .

[21]  M. D’Eramo,et al.  An experimental validation of load distribution in screw threads , 1991 .

[22]  Wanlin Guo,et al.  Modified James–Anderson method for stress intensity factors of three-dimensional cracked bodies , 2005 .

[23]  Zhi-wei Yu,et al.  Failure analysis of connecting bolts and location pins assembled on the plate of main-shaft used in a locomotive turbochanger , 2008 .

[24]  Nohyu Kim,et al.  Measurement of axial stress using mode-converted ultrasound , 2009 .

[25]  Hamza K. Akyildiz,et al.  Effects of the machining conditions on the strain hardening and the residual stresses at the roots of screw threads , 2010 .

[26]  Toshimichi Fukuoka,et al.  Stresses in Bolt and Nut : Effects of Contact Conditions at the First Ridge , 1986 .