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Contact Stress Analysis around Elliptical Bolt-loaded Hole in Orthotropic Plates

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Author(s): O. Aluko | S. T. Adedokun | T. A. Fashanu

Journal: International Journal of Engineering and Technology
ISSN 2049-3444

Volume: 2;
Issue: 12;
Start page: 1991;
Date: 2012;
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Keywords: Circular | Elliptic | Contact stresses | Frictional effects | Stress functions

ABSTRACT
The practicality of changing the bolt shape from circular to elliptical under friction effects in order to reduce the contact stress distributions was analytically investigated. The analysis utilized the complex stress functions obtained from the assumed displacement expressions that satisfy the boundary conditions around the hole to determine the contact stresses. In the method of solution coulomb friction was used to determine the prescribed displacements at the boundary. The material properties of graphite/epoxy and carbon fiber reinforced plastics laminates were used in this investigation and the results compared with available literature. It was revealed that the stress distributions followed the same pattern in both geometries but with lower magnitude in elliptical shape and the reduction in stress distributions caused by changing the bolt shape from circular to elliptic depend on friction coefficient.

Tango Jona
Tangokurs Rapperswil-Jona

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