Skip to main content
Log in

Uniqueness of the concentrated-load problem in the linear theory of couple-stress elasticity

  • Published:
Meccanica Aims and scope Submit manuscript

Sommario

Si fa notare che esistono almeno due soluzioni diverse del problema dei carichi concentrati nella teoria lineare, a due dimensioni, delle coppie di volume quando la formulazione è basata sul teorema di unicità.

Si dimostra una estensione di questo teorema di unicità. Si trova un gruppo di condizioni sufficienti per l'unicità; queste condizioni vengono usate nella formulazione del problema del carico concentrato che dà luogo ad un'unica soluzione.

La nuova condizione significativa è che l'ordine della singolarità dello sforzo è limitato a O(r−1), dove r è la distanza dal carico concentrato.

Summary

It is pointed out that there exist at least two different solutions of the problem of concentrated loads in the two-dimensional, linear couple-stress theory when the formulation is based on the usual uniqueness theorem. An extension of this uniqueness theorem is proved. A set of conditions sufficient for uniqueness is found and is used in a formulation of the concentrated load problem which results in a unique solution. The significant new condition is that the order of the stress singularity is limited to O(r−1), where r is the distance from the concentrated load.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

References

  1. R. Muki andE. Sternberg,The Influence of Couple-Stresses on Singular Stress Concentrations in Elastic Solids, Zeitschrift fur angewandte Mathematik und Physik, Vol. 16, pp. 611–648, 1965.

    Article  Google Scholar 

  2. G. R. Tiwari,Effect of Couple Stress on the Elastic Stress Distribution in a Semi-Infinite Plate under a Concentrated Load, Journal of Science and Engineering Research, India, Vol. 9, no. 1, pp. 30–38, 1965.

    Google Scholar 

  3. C. W Bert andF. J. Appl,Two-Dimensional Couple-Stress Elasticity with Application to Two Examples Involving Concentrated Loadings, Proceedings of the Fifth U.S. National Congress of Applied Mechanics, p. 245, 1966.

  4. R. D. Mindlin andH. F. Tiersten,Effect of Couple-Stresses in Linear Elasticity, Arch. Rational Mech. Analysis, Vol. 2, pp. 415–448, 1962.

    Article  Google Scholar 

  5. E. Sternberg andR. A. Eubanks,On the Concept of Concentrated Loads and an Extension of the Uniqueness Theorem in the Linear Theory of Elasticity, Journal of Rational Mech. and Analysis, Vol. 4, pp. 135–168, 1955.

    Google Scholar 

  6. R. D. Mindlin,Influence of Couple Stresses on Stress Concentrations, Experimental Mechanics, Vol. 3, pp. 1–7, 1963.

    Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Additional information

This work is a result of research sponsored by the Office of Naval Research, U.S. Navy, under Contract Nonr-610(06).

Rights and permissions

Reprints and permissions

About this article

Cite this article

Hartranft, R.J., Sih, G.C. Uniqueness of the concentrated-load problem in the linear theory of couple-stress elasticity. Meccanica 3, 195–198 (1968). https://doi.org/10.1007/BF02129253

Download citation

  • Received:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF02129253

Keywords

Navigation