Evaluation of fracture mechanics parameters in bimaterial systems using strain gages
Date of Original Version
An experimental study has been conducted in which strain fields were used to investigate and characterize the behavior of interfacial cracks in bimaterial systems under quasi-static load conditions. Strain field equations were derived from the available stress field equations. A parametric study was followed by experimentation, in which strain gage techniques were used to obtain values of the complex stress intensity factor, K, in the region of the crack tip. These values were then compared with the theoretical predictions. Furthermore, proven photoelastic techniques were also used to provide additional confirmation of the strain gage results. Experiments were conducted using a PSM-1/aluminum bimaterial system to determine K and mixity ψ. The results showed that values of K1 obtained using strain gages averaged approximately 11% deviation from theory, while K2 compared much better with an average of about 4% deviation from theory. © Elsevier Science Ltd.
Engineering Fracture Mechanics
Ricci, Vittorio, Arun Shukla, and Raman P. Singh. "Evaluation of fracture mechanics parameters in bimaterial systems using strain gages." Engineering Fracture Mechanics 58, 4 (1997): 273-283. doi:10.1016/S0013-7944(97)00133-1.