Inverse Analysis Method for Photoelastic Measurement of 3D Stress State
A new nondestructive method for identifying boundary conditions applied on a 3D linear elastic body is developed based on the load incremental approach, which linearizes the nonlinear governing equation of photoelasticity by considering small increments in applied load. Direct stress identification based on load incremental approach is highly sensitive to measurement errors and involves considerable amount of computations. On the other hand, identification of boundary conditions based on load incremental approach and thereby the state of stress is not only less sensitive to measurement errors but also involves less computation. This boundary conditions identification can be considered as an introduction of equilibrium condition and the property of linear elasticity to overcome the shortcomings of direct stress identification.
Kikuo Kishimoto, Masanori Kikuchi, Tetsuo Shoji and Masumi Saka
M.L.L. Wijerathne et al., "Inverse Analysis Method for Photoelastic Measurement of 3D Stress State", Key Engineering Materials, Vols. 261-263, pp. 753-758, 2004