Evaluation of fracture mechanics parameters in bimaterial systems using strain gages

Document Type

Article

Date of Original Version

1-1-1997

Abstract

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.

Publication Title, e.g., Journal

Engineering Fracture Mechanics

Volume

58

Issue

4

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