DOI QR코드

DOI QR Code

Some general properties in the degenerate scale problem of antiplane elasticity or Laplace equation

  • Chen, Y.Z. (Division of Engineering Mechanics, Jiangsu University)
  • 투고 : 2017.05.01
  • 심사 : 2017.06.27
  • 발행 : 2017.12.25

초록

This paper investigates some general properties in the degenerate scale problem of antiplane elasticity or Laplace equation. For a given configuration, the degenerate scale problem is solved by using conformal mapping technique, or by using the null field BIE (boundary integral equation) numerically. After solving the problem, we can define and evaluate the degenerate area which is defined by the area enclosed by the contour in the degenerate configuration. It is found that the degenerate area is an important parameter in the problem. After using the conformal mapping, the degenerate area can be easily evaluated. The degenerate area for many configurations, from triangle, quadrilles and N-gon configuration are evaluated numerically. Most properties studied can only be found by numerical computation. The investigated properties provide a deeper understanding for the degenerate scale problem.

키워드

참고문헌

  1. Chen, J.T. and Wu, A.C. (2007), "Null-field approach for the multi-inclusion problem under antiplane shears", ASME J. Appl. Mech., 74, 469-487. https://doi.org/10.1115/1.2338056
  2. Chen, J.T., Lin, J.H., Kuo, S.R. and Chiu, Y.P. (2001), "Analytical study and numerical experiments for degenerate scale problems in boundary element method using degenerate kernels and circulants", Eng. Anal. Bound. Elem., 25, 819-828. https://doi.org/10.1016/S0955-7997(01)00064-9
  3. Chen, Y.Z. (2013), "Evaluation of degenerate scale for N-gon configuration in antiplane elasticity", Acta Mech. Solida Sinica, 26, 514-518. https://doi.org/10.1016/S0894-9166(13)60046-4
  4. Chen, Y.Z. (2016), "Evaluation of the degenerate scale in antiplane elasticity using null field BIE", Appl. Math. Lett., 54, 15-21. https://doi.org/10.1016/j.aml.2015.11.003
  5. Chen, Y.Z. and Lin, X.Y. (2010), "Degenerate scale problem for the Laplace equation in the multiply connected region with outer elliptic boundary", Acta Mech., 215, 225-233. https://doi.org/10.1007/s00707-010-0341-6
  6. Chen, Y.Z. and Wang, Z.X. (2013), "Properties of integral operators in complex variable boundary integral equation in plane elasticity", Struct. Eng. Mech., 45, 495-519. https://doi.org/10.12989/sem.2013.45.4.495
  7. Chen, Y.Z. Lin, X.Y. and Wang, Z.X. (2000), "Evaluation of the degenerate scale for BIE in plane elasticity and antiplane elasticity by using conformal mapping", Eng. Anal. Bound. Elem., 33, 147-158.
  8. Corfdir, A. and Bonnet, G. (2013), "Degenerate scale for the Laplace problem in the half plane; approximate logarithmic capacity for two distant boundaries", Eng. Anal. Bound. Elem., 37, 836-841. https://doi.org/10.1016/j.enganabound.2013.02.009
  9. Corfdir, A. and Bonnet, G. (2017), "Degenerate scale for 2D Laplace equation with Robin boundary condition", Eng. Anal. Bound. Elem., 80, 49-57. https://doi.org/10.1016/j.enganabound.2017.02.018
  10. He, W.J., Ding, H.J. and Hu, H.C. (1996), "Degenerate scales and boundary element analysis of two dimensional potential and elasticity problems", Comput. Struct., 60, 155-158. https://doi.org/10.1016/0045-7949(95)00343-6
  11. Kuo, S.R. Chen, J.T. and Kuo, S.K. (2013), "Linkage between the unit logarithmic capacity in the theory of complex variables and the degenerate scale in the BEM/BIEMs", Appl. Math. Lett., 26, 929-938. https://doi.org/10.1016/j.aml.2013.04.011
  12. Kuo, S.R., Chen, J.T., Lee, J.W. and Chen, Y.W. (2013), "Analytical derivation and numerical experiments of degenerate scale for regular N-gon domains in two-dimensional Laplace problems", Appl. Math. Comput., 219, 5668-5683.
  13. Vodicka, R. (2013), "An asymptotic property of degenerate scales for multiple holes in plane elasticity", Appl. Math. Comput., 220, 166-175.
  14. Vodicka, R. and Mantic, V. (2008), "On solvability of a boundary integral equation of the first kind for Dirichlet boundary value problems in plane elasticity", Comput. Mech., 41, 817-826. https://doi.org/10.1007/s00466-007-0202-x
  15. Vodicka, R. and Petrik, M. (2015), "Degenerate scales for boundary value problems in anisotropic elasticity", Int. J. Solid. Struct., 52, 209-219. https://doi.org/10.1016/j.ijsolstr.2014.10.004
  16. Zhang, X.S. and Zhang, X.X. (2008), "Exact solution for the hypersingular boundary integral equation of two-dimensional elastostaticcs", Struct. Eng. Mech., 30, 279-296. https://doi.org/10.12989/sem.2008.30.3.279