Showing papers by "K. Ramesh published in 2001"
TL;DR: In this paper, a generic approach to simulation of error in digital photoelasticity is presented and the simulation has showed how to associate the errors in the phase map to the misalignment of optical elements.
Abstract: The accuracy of parameter evaluation by automated photoelastic techniques depends on both their theoretical formulation and experimental procedure The sensitivity of techniques such as phase shifting and load stepping to error in optical misalignment and quarter-wave plate mismatch would be of interest A generic approach to simulation of error in digital photoelasticity is presented The simulation has showed how to associate the errors in the phase map to the misalignment of optical elements
11 citations
13 Jun 2001
TL;DR: In this article, a non-linear least squares approach is adapted to process the data and numerical experimental is carried out on a disc under diametral compression to show its validity.
Abstract: A new whole field methodology is proposed for stress separation using only isochromatic data collected over the field for normal and oblique incidences. For this purpose, a non-linear least squares approach is adapted to process the data. Numerical experimental is carried out on a disc under diametral compression to show its validity.
5 citations
TL;DR: The atan and atan2 functions are standard features of a high level programming language like Fortran or C, which are used to calculate the inverse tangent functions, and considering that the angle 8 refers to the fast axis of the model produces the following intensity equation.
1 citations