Showing papers by "K. Ramesh published in 1999"
TL;DR: A new whole field technique for determination of characteristic parameters in integrated photoelasticity using phase-shifting methodology is proposed and verified experimentally for the problem of a circular disk under diametral compression viewed in oblique incidence.
31 citations
TL;DR: The recent advances in rapid prototyping (RP) have made it possible to produce prototypes of very complicated parts directly from 3D CAD models without using part specific tooling as discussed by the authors.
Abstract: The recent advances in rapid prototyping (RP) [1–5] have made it possible to produce prototypes of very complicated parts directly from three-dimensional computer aided design (CAD) models without using part specific tooling. Application of these techniques for producing prototypes leads to considerable reduction in the total cycle time. There are a number of RP techniques developed so far, such as stereolithography (STL), fused deposition modelling (FDM), solid ground curing (SGC), selective laser sintering (SLS) etc. This technology has emerged in response to the need for reducing the lead-time to produce physical prototypes. These models could be directly used for checking form, fit and function, getting management approval for detailed design and development, conducting market research, submitting for price negotiations and as models for wind tunnel testing.
23 citations
23 citations
TL;DR: In this article, the role of photoelasticity in selecting an appropriate discretization scheme for modelling problems in stress analysis is presented in finite element modelling, apart from proper element selection, selection of an appropriate Discrete Discretization Scheme is crucial in correctly evaluating the intended variables.
Abstract: In finite element modelling, apart from proper element selection, selection of an appropriate discretization scheme is crucial in correctly evaluating the intended variables. The role of photoelasticity in selecting an appropriate discretization scheme for modelling problems in stress analysis is presented in this paper.
20 citations
TL;DR: Using a monochromatic light source for illumination, a new approach which uses two different loads to get continuous isoclinic fringes is proposed in this article, and a new set of optical arrangements in a plane polariscope setup is proposed for this purpose.
Abstract: Using a monochromatic light source for illumination, a new approach is proposed which uses two different loads to get continuous isoclinic fringes A new set of optical arrangements in a plane polariscope setup is proposed for this purpose The intensity equations are obtained by Jones calculus The methodology is verified for the problem of a disc under diametral compression
14 citations
29 Apr 1999
TL;DR: In this article, a whole field technique for determination of characteristic parameters in integrated photoelasticity using phase-shifting methodology is proposed and appropriate optical arrangements necessary for this are presented and the intensity equations are obtained by Jones' calculus.
Abstract: In this paper a new whole field technique for determination of characteristic parameters in integrated photoelasticity using phase-shifting methodology is proposed. Appropriate optical arrangements necessary for this are presented and the intensity equations are obtained by Jones' calculus. The new methodology is verified experimentally for the problem of a circular disk under diametral compression viewed in oblique incidence.© (1999) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.