Summary
A general direct method for the evaluation of hypersingular integrals in the BEM is presented with reference to two-dimensional problems. It is first shown that there are no special problems in the derivation of hypersingular boundary integral equations (HBIE’s), that is, in taking the singular point on the boundary. No unbounded quantities ultimately arise if the limiting process is properly performed. In the second part, the limit is expressed in terms of intrinsic coordinates. This is maybe the most critical step since the effects of the mapping must be accounted for. Then, the use of suitable expansions allows all singular integration to be performed analytically, even if curved higher-order boundary elements are employed. The original hypersingular integral is thus shown to be equivalent to some simple computable terms.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Bonnet M., 1989, “Regular boundary integral equations for three-dimensional finite or infinite bodies with or without curved cracks in elastodynamics”, Boundary Element Techniques: Applications in Engineering, Brebbia C.A. and Zamani N., eds., Computational Mechanics Publications, Southampton, pp. 171–188..
Cruse T. A., and Novati G., 1990, “Traction BIE formulations and applications to non-planar and multiple cracks”, forthcoming.
Gray L. J., Martha L. F., and Ingraffea A. R., 1990, “Hypersingular integrals in boundary element fracture analysis”, Int. J. Num. Methods Eng., Vol. 29, pp. 1135–1158.
Guiggiani M., 1991, “Computing principal value integrals in 3D BEM for time-harmonic elastodynamics—A direct approach”, Comm. in Appl. Numerical Methods, forthcoming.
Guiggiani M., and Casalini P., 1987, “Direct computation of Cauchy principal value integrals in advanced boundary elements”, Int. J. Num. Methods Eng., Vol. 24, pp. 1711–1720.
Guiggiani M., and Gigante A., 1990, “A general algorithm for multidimensional Cauchy principal value integrals in the boundary element method”, ASME Journal of Applied Mechanics, Vol. 57, pp. 906–915.
Guiggiani M., Krishnasamy G., Rudolphi T. J., and Rizzo F. J., 1991, “A general algorithm for the numerical solution of hypersingular boundary integral equations”, ASME Journal of Applied Mechanics, (to appear).
Guiggiani M, Krishnasamy G., Rizzo F. J., and Rudolphi T. J., 1991, “Hypersingular boundary integral equations: A new approach to their numerical treatment”, Proc. IABEM-90 Conference,October 15–19, 1990, Rome, Italy, Springer-Verlag (in press).
Kellog O. D., 1929, Foundations of Potential Theory, Frederick Ungar Publishing Comp., New York.
Krishnasamy G., Schmerr L. W., Rudolphi T. J., and Rizzo F. J., 1990, “Hypersingular boundary integral equations: Some applications in acoustic and elastic wave scattering”, ASME Journal of Applied Mechanics, Vol. 57, pp. 404–414.
Martin P. A., and Rizzo F. J., 1989, “On boundary integral equations for crack problems”, Proc. Royal Soc. London, Vol. A 421, pp. 341–355.
Nishimura N., and Kobayashi S., 1989, “A regularized boundary integral equation method for elastodynamic crack problems”, Computational Mechanics, Vol. 4, pp. 319–328.
Polch E. Z., Cruse T. A., and Huang C.-J., 1987, “Traction BIE solutions for flat cracks”, Computational Mechanics, Vol. 2, pp. 253–267.
Rudolphi T. J., 1991, “The use of simple solutions in the regularization of hypersingular boundary integral equations”, Mathematical and Computer Modelling,Special Issue on BIEM/BEM, in press.
Slâdek V., and Slâdek J., 1984, “Transient elastodynamic three-dimensional problems in cracked bodies”, Applied Mathematical Modelling, Vol. 8, pp. 2–10.
Villaggio P., 1977, Qualitative Methods in Elasticity, Noordhoff International Publishing, Leyden.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1992 Springer Fachmedien Wiesbaden
About this chapter
Cite this chapter
Guiggiani, M. (1992). Direct Evaluation of Hypersingular Integrals in 2D BEM. In: Hackbusch, W. (eds) Numerical Techniques for Boundary Element Methods. Notes on Numerical Fluid Mechanics (NNFM), vol 33 7. Vieweg+Teubner Verlag, Wiesbaden. https://doi.org/10.1007/978-3-663-14005-4_3
Download citation
DOI: https://doi.org/10.1007/978-3-663-14005-4_3
Publisher Name: Vieweg+Teubner Verlag, Wiesbaden
Print ISBN: 978-3-528-07633-7
Online ISBN: 978-3-663-14005-4
eBook Packages: Springer Book Archive