Thermoelastic analysis of an infinite curvilinear cracked plate th a point heat source
| Autor: | Kuo Lei Yuan, 郭力源 |
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| Rok vydání: | 1993 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 81 Boundary value problems for circular-arc crack embedded in the homogeneous material or dissimilar materials under the appli -cation of a point heat source are formulated and solved in clos -ed form. Based on the Hilbert problem formulation and a special technique of contour integration, exact solutions of the tempera -ture field and stress field are obtained in an explicit form. It is found that the temperature gradient or thermal stresses near the tips of a curved crack always possess the characteristic inverse square-root singularity in terms of the radial distence away from the crack tip under the application of heat source. Due to this singular behavior, the heat flux intensity factor is intr -oduced to measure the thermal energy intensification cumulated in the vicinity of the crack tip. Numerical results for the temp -erature and heat flux intensity factor are provided in graphic form. The simultaneous existence of Mode-I and Mode-II stress int -ensity factors are provided in the present study. It is shown that the thermal system having a smaller crack length would make the heat flux intensity factor lower. Both the Mode-I and Mode-II stress intensity factors for homogeneous material are found to depend on the strength of heat source, heat conductivity as well as thermal and elastic properties. The non-negative Mode-I stress intensity factor is found to present in this paper for the applic -ation of the heat sink which validates the fully open cracksumption. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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