Evaluation of Stress Intensity Factors in Biaxial Tensile Stress using Thermalelasticity and Photoelasticity
Stress intensity factor K is analyzed by measuring distribution of sum of the principal stresses around slit tip by an infrared stress measuring device. Under the biaxial tensile stress, both K-values of the isotropic materials with slit angle 0° and 45° show there is no influence of the slit angle at Mode I. The tolerance of the measured K-values of the test specimens which are compared with measured K-values by photoelastic method are around 10-20and these increase as applied cyclic load increases. These tolerance can be reduced up to about 8% by modifying measurements. The effectiveness of the thermoelastic stress measurement method to KI value analyzing under biaxial tensile stress was confirmed.
M.H. Aliabadi, Qingfen Li, Li Li and F.-G. Buchholz
A. Shimamoto et al., "Evaluation of Stress Intensity Factors in Biaxial Tensile Stress using Thermalelasticity and Photoelasticity ", Key Engineering Materials, Vols. 324-325, pp. 1103-1108, 2006