Abstract
We consider the system of elastostatics for an elastic medium consisting of an imperfection of small diameter, embedded in a homogeneous reference medium. The Lamé constants of the imperfection are different from those of the background medium. We establish a complete asymptotic formula for the displacement vector in terms of the reference Lamé constants, the location of the imperfection and its geometry. Our derivation is rigorous, and based on layer potential techniques. The asymptotic expansions in this paper are valid for an elastic imperfection with Lipschitz boundaries. In the course of derivation of the asymptotic formula, we introduce the concept of (generalized) elastic moment tensors (Pólya–Szegö tensor) and prove that the first order elastic moment tensor is symmetric and positive (negative)-definite. We also obtain estimation of its eigenvalue. We then apply these asymptotic formulas for the purpose of identifying with high precision the order of magnitude of the diameter of the elastic inclusion, its location, and its elastic moment tensors.
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C. Alves and H. Ammari, Boundary integral formulae for the reconstruction of imperfections of small diameter in an elastic medium. SIAM J. Appl. Math. 62 (2002) 94–106.
H. Ammari and H. Kang, High-order terms in the asymptotic expansions of the steady-state voltage potentials in the presence of conductivity inhomogeneities of small diameter. MSRI Preprint 2001-046, to appear in SIAM J. Math. Anal.
H. Ammari and H. Kang, Properties of generalized polarization tensors. SIAM J. Multiscale Modeling Simulations, to appear.
H. Ammari, S. Moskow and M.S. Vogelius, Boundary integral formulas for the reconstruction of electromagnetic imperfections of small diameter. ESAIM: Control Optim. Calc. Var., to appear.
H. Ammari and J.K. Seo, A new formula for the reconstruction of conductivity inhomogeneities. Adv. in Appl. Math., to appear.
H. Ammari, M.S. Vogelius and D. Volkov, Asymptotic formulas for perturbations in the electromagnetic fields due to the presence of imperfections of small diameter II.The full Maxwell equations. J. Math. Pures Appl. 80 (2001) 769–814.
M. Brühl, M. Hanke and M.S. Vogelius, A direct impedance tomography algorithm for locating small inhomogeneities. Numer. Math., to appear.
D.J. Cedio-Fengya, S. Moskow and M.S. Vogelius, Identification of conductivity imperpections of small diameter by boundary measurements: Continuous dependence and computational reconstruction. Inverse Problems 14 (1998) 553–595.
P.G. Ciarlet, Mathematical Elasticity, Vol I. Norh-Holland, Amsterdam (1988).
B.E. Dahlberg, C.E. Kenig and G. Verchota, Boundary value problem for the systems of elastostatics in Lipschitz domains. Duke Math. J. 57 (1988) 795–818.
L. Escauriaza and J.K. Seo, Regularity properties of solutions to transmission problems. Trans. Amer. Math. Soc. 338 (1) (1993) 405–430.
A. Friedman and M.S. Vogelius, Identification of small inhomogeneities of extreme conductivity by boundary measurements: a theorem on continuous dependence. Arch. Rational Mech. Anal. 105 (1989) 299–326.
O. Kwon, J.K. Seo and J.R. Yoon, A real-time algorithm for the location search of discontinuous conductivities with one measurement. Comm. Pure Appl. Math. 55 (2002) 1–29.
T. Lewiński and Sokolowski, Energy change due to the appearance of cavities in elastic solids. Preprint (2002).
V.G. Maz'ya and S.A. Nazarow, The asymptotic behavior of energy integrals under small perturbations of the boundary near corner points and conical points (in Russian). Trudy Moskovsk. Matem. Obshch. 50; English translation: Trans. Moscow Math. Soc. (1988) 77–127.
A.B. Movchan and S.K. Serkov, The Pólya-Szegö matrices in asymptotic models of dilute composite. European J. Appl. Math. 8 (1997) 595–621.
G. Pólya and G. Szegö, Isoperimetric Inequalities in Mathematical Physics, Annals of Mathematical Studies, Vol. 27. Princeton Univ. Press, Princeton (1951).
M. Schiffer and G. Szegö, Virtual mass and polarization. Trans. Amer. Math. Soc. 67 (1949) 130–205.
M.S. Vogelius and D. Volkov, Asymptotic formulas for perturbations in the electromagnetic fields due to the presence of inhomogeneities. Math. Model. Numer. Anal. 34 (2000) 723–748.
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Ammari, H., Kang, H., Nakamura, G. et al. Complete Asymptotic Expansions of Solutions of the System of Elastostatics in the Presence of an Inclusion of Small Diameter and Detection of an Inclusion. Journal of Elasticity 67, 97–129 (2002). https://doi.org/10.1023/A:1023940025757
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DOI: https://doi.org/10.1023/A:1023940025757