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Thermal stress concentrations in a tooth

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Summary

A complex variable theory of plane thermoelasticity is used to determine closed form expressions for the steady-state stress and displacement fields in an elastic half-plane containing a symmetrical, tooth-shaped projection. A singular line heat source pierces the half-plane at an arbitrary point. The tooth surface is assumed to be traction free and to satisfy either isothermal or adiabatic thermal boundary conditions. Graphical results are presented for a particular tooth geometry with the singular heat source located at a point on the axis of symmetry (i) near the tooth surface, and (ii) remote from the tooth. Of particular interest is the fact that the maximum stresses do not occur at the minimum radius of curvature of the tooth.

Zusammenfassung

Eine Theorie der ebenen Thermoelastizität mit komplexen Variablen wird verwendet, um geschlossene Ausdrücke für die stationären Beanspruchungs-und Verschiebungsfelder in einer elastischen Halbebene zu bestimmen, die einen symmetrischen, zahnförmigen Vorsprung aufweist. Eine singuläre lineare Wärmequelle durchdringt die Halbebene in einem beliebigen Punkt. Die Zahnoberfläche soll frei von Kräften sein und entweder isotherme oder adiabatische Randbedingungen aufweisen. Lösungen werden graphisch dargestellt für eine besondere Zahngeometrie, wo die Wärmequelle in einem Punkt der Symmetrieachse1. nahe der Zahnoberfläche, und 2. weit von ihr entfernt gelegen ist. Von besonderem Interesse ist, daß die Höchstbeanspruchungen nicht am Minimumradius der Zahnkrümmung auftreten.

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References

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This work was supported by the United States Atomic Energy Commission. Reproduction in whole or in part is permitted for any purpose of the U. S. Government.

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Warren, W.E., Holmes, W.T. Thermal stress concentrations in a tooth. Acta Mechanica 1, 54–59 (1965). https://doi.org/10.1007/BF01270504

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  • DOI: https://doi.org/10.1007/BF01270504

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