caa a22 4500 465751202 CHVBK 20180323111834.0 cr unu---uuuuu 170327e19900601xx s 000 0 eng 10.1007/BF02410247 doi (NATIONALLICENCE)springer-10.1007/BF02410247 Hybrid stress analysis by digitized photoelastic data and numerical methods [Elektronische Daten] [H. Mahfuz, R. Case, T. Wong] A method is presented that determines photoelastic isochromatic values at the nodal points of a grid mesh which in turn is generated by a computer program that accepts digitized input. Values of σ1 - σ2 are computed from the digitized fringe orders. The Laplace equation is solved to separate the principal stresses at each nodal point. The method is extended to digitize isoclinics. Subsequently, σ x - σ y and τ xy are calculated to be used as starting values for the solution of the pertaining partial differential equations to enhance convergence. For further accelerating the rate of convergence, superfluous boundary conditions are added from the digitized data; significant improvement is demonstrated. Estimated values of σ x - σ y from the digitized data are further used in conjunction with the solution of the Laplace equation to determine the state of stress without solving the boundary value problems. Society for Experimental Mechanics, Inc., 1990 Mahfuz H. Department of Mechanical Engineering, Tuskegee University, 36088, Tuskegee, AL aut Case R. Department of Mechanical Engineering, Florida Atlantic University, 33431, Boca Raton, FL aut Wong T. Department of Mechanical Engineering, Florida Atlantic University, 33431, Boca Raton, FL aut Experimental Mechanics Kluwer Academic Publishers 30/2(1990-06-01), 190-194 0014-4851 30:2<190 1990 30 11340 https://doi.org/10.1007/BF02410247 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02410247 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Mahfuz H. Department of Mechanical Engineering, Tuskegee University, 36088, Tuskegee, AL aut NATIONALLICENCE 700 1- Case R. Department of Mechanical Engineering, Florida Atlantic University, 33431, Boca Raton, FL aut NATIONALLICENCE 700 1- Wong T. Department of Mechanical Engineering, Florida Atlantic University, 33431, Boca Raton, FL aut NATIONALLICENCE 773 0- Experimental Mechanics Kluwer Academic Publishers 30/2(1990-06-01), 190-194 0014-4851 30:2<190 1990 30 11340 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer