An inverse problem finite-element-method-based approach to the hole drilling method in photoelasticity

Abstract:

The classical hole drilling method inverse problem in photoelasticity is generally defined in a biaxially loaded infinite plate in plane stress, and is dual in nature. One part of this duality relates to the problem of an infinite plate in which the circular hole is drilled first and then the biaxial loads are applied. The other is the residual stress problem, or hole drilling of an infinite plate after biaxial application of the loads. The objective in both of these experimental situations is the determination of the far-field or applied (residual) stresses from interpreting the isochromatic fringes orders around the hole. This paper addresses the problem of separation of stresses using the finite element method as the means to model the plate with a hole, rather than the Kirsch solution, and a least-squares optimization approach to resolve the applied stresses. A unique feature of this approach is that it is possible to use a finite plate width.

Año de publicación:

2005

Keywords:

Fuente:

scopus