Stable Determination of a Rigid Inclusion in an Anisotropic Elastic Plate

In this paper we consider the inverse problem of determining a rigid inclusion inside a thin plate by applying a couple field at the boundary and by measuring the induced transversal displacement and its normal derivative at the boundary of the plate. The plate is made by non-homogeneous linearly elastic material belonging to a general class of anisotropy. For this severely ill-posed problem, under suitable a priori regularity assumptions on the boundary of the inclusion, we prove a stability estimate of log-log type.

[1]  Pizhong Qiao,et al.  A strain energy-based damage severity correction factor method for damage identification in plate-type structures , 2012 .

[2]  A. Morassi,et al.  Sharp three sphere inequality for perturbations of a product of two second order elliptic operators and stability for the Cauchy problem for the anisotropic plate equation , 2010, 1008.3274.

[3]  A. Morassi,et al.  Uniqueness and Stability in Determining a Rigid Inclusion in an Elastic Body , 2009 .

[4]  A. Morassi,et al.  Detecting general inclusions in elastic plates , 2009 .

[5]  Luca Rondi,et al.  Examples of exponential instability for inverse inclusion and scattering problems , 2003 .

[6]  D. Gilbarg,et al.  Elliptic Partial Differential Equa-tions of Second Order , 1977 .

[7]  Edi Rosset,et al.  The Inverse Conductivity Problem with One Measurement: Bounds on the Size of the Unknown Object , 1998, SIAM J. Appl. Math..

[8]  Luca Rondi,et al.  The stability for the Cauchy problem for elliptic equations , 2009, 0907.2882.

[9]  G. Fichera Existence Theorems in Elasticity , 1973 .

[10]  A. Morassi,et al.  Unique determination of unknown boundaries in an elastic plate by one measurement , 2010 .

[11]  S. Agmon Lectures on Elliptic Boundary Value Problems , 1965 .

[12]  A. Morassi,et al.  Estimating area of inclusions in anisotropic plates from boundary data , 2011, 1109.3397.

[13]  M. Gurtin The Linear Theory of Elasticity , 1973 .

[14]  Elena Beretta,et al.  Optimal stability for inverse elliptic boundary value problems with unknown boundaries , 2000 .

[15]  A. Morassi,et al.  Size estimates for inclusions in an elastic plate by boundary measurements , 2007 .