THREE- LAYERED ELASTIC COMPOSITE WITH SURFACE CRACKS SUBJECTED TO CONVECTIVE COOLING | ||||
| The International Conference on Applied Mechanics and Mechanical Engineering | ||||
| Article 25, Volume 13, 13th International Conference on Applied Mechanics and Mechanical Engineering., May 2008, Page 18-33 PDF (475.66 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/amme.2008.39012 | ||||
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| Author | ||||
| RIZK A. A. | ||||
| Associate professor, Dept. of Science in Engineering, Faculty of Engineering, International Islamic University, Malaysia, Kuala Lumpur, Malaysia. | ||||
| Abstract | ||||
| ABSTRACT The Thermoelastic problem for homogenous layer bonded to two similar coated layers with two surface cracks located symmetrically in the outer layers under transient thermal stresses is considered. The transient thermal stresses are generated due to quenching the surfaces containing the edge crack by convective cooling. Consequently, very high tensile stresses developed near the cooled surfaces resulting in severe damage. The analysis of the problem is worked out using the superposition technique and the principle of quasi-static thermoelasticity behavior. The Fourier integral transform technique is used to solve the crack problem resulting in a singular integral equation of Cauchy type with the derivative of the crack surface displacement as unknown function which is solved numerically. Some numerical values of the transient stress intensity factors for two material combinations are obtained for both edge crack and crack terminating at the interface and demonstrated in terms of time, crack length, coefficient of heat transfer and thickness ratio. | ||||
| Keywords | ||||
| Fracture mechanics; Stress Intensity Factor; thermal stresses; Layered Materials; Convective heat transfer | ||||
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