Whole field evaluation of stress components indigital photoelasticity—Issues, implementation and application M. Ramji, K. RameshDepartment of Applied Mechanics, Indian Institute of Technology, Madras, IndiaReceived 15 May 2007; received in revised form 11 September 2007; accepted 26 September 2007Available online 19 November 2007 AbstractIn photoelasticity, the method of obtaining the individual values of principal stresses/normal stresses separately is referred to as ...