Stress Analysis of Crane Hook and Validation by Photo-Elasticity

Rashmi Uddanwadiker

.

DOI: 10.4236/eng.2011.39115                

Abstract

Crane Hooks are highly liable components and are always subjected to failure due to accumulation of large amount of stresses which can eventually lead to its failure. To study the stress pattern of crane hook in its loaded condition, a solid model of crane hook is prepared with the help of CMM and CAD software. Real time pattern of stress concentration in 3D model of crane hook is obtained. The stress distribution pattern is verified for its correctness on an acrylic model of crane hook using Diffused light Polariscope set up. By predicting the stress concentration area, the shape of the crane is modified to increase its working life and reduce the failure rates.

Keywords

Photo-Elasticity, Crane Hook, Finite Element Method, Curved Beam, Stress Optic Law

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	ASME Standard B30.2, “Overhead Gantry Cranes (Top Running Bridge, Single or Multiple Girder, Top Running Trolley Hoist),” 2005.
[2]	ASME Standard B30.9, “Slings Safety Standard for Ca- bleways, Cranes, Derricks, Hoists, Hooks, Jacks and Slings,” 2006.
[3]	ASME Standard B30.10, “Hooks Safety Standard for Ca- bleways, Cranes, Derricks, Hoists, Hooks, Jacks and Slings,” 2009.
[4]	Department of Labour of New Zealand, “Approved Code of Practice for Cranes,” 3rd Edition, 2009.
[5]	B. Ross, B. McDonald and S. E. V. Saraf, “Big Blue Goes Down. The Miller Park Crane Accident,” Engineering Failure Analysis, Vol. 14, No. 6, 2007 pp. 942-961.
[6]	Fatigue Cycle. http://www.public.iastate.edu/~gkstarns/ME417
[7]	J. Petit, D. L. Davidson and S. Suresh, “Fatigue Crack Growth under Variable Amplitude Loading,” Springer Publisher, New York, 2007.
[8]	Y. Yokoyamal, “Study of the Structural Relaxa- Tion-Induced Embrittlement of Hypoeutectic Zr–Cu–Al Ternary Bulk Glassy Alloys,” Acta Materialia, Vol. 56, No. 20, 2008 pp. 6097-6108. doi:10.1016/j.actamat.2008.08.026
[9]	S. S. Bhavikatti, “Finite Element Analysis,” New Age In- ternational, New Delhi, 2007.
[10]	P. Seshu, “Textbook of Finite Element Analysis,” PHI Learning Pvt. Ltd., New Delhi, 2004
[11]	J. W. Dally and W. F. Riley, “Experimental Stress Analysis,” Springer Publisher, New York, 1993.
[12]	Curved Beam Analysis. http://www.roymech.co.uk/Useful_Tables/Beams/Curved_beams.html
[13]	H. A. Rothbart, “Mechanical Design Handbook: Measurement, Analysis, and Control of Dynamic Systems,” McGraw-Hill, Columbus, 2006.