Publication

Abstract : The major aim of the present paper is to evaluate the J integral of thin ductile sheets and to examine the significance of the measured J integral, to explain the fracture resistance of AA 5052 sheets. Notch Tip Opening Displacement (NTOD), Max. Load, Failure Load, and J integral were considered as response parameters. Specimen thickness, Specimen Width and Notch Length to Width ratio were considered as design parameters. Single Edged Notched Tension (SENT) specimens were prepared as per ASTM E1820 standards and tested in UTM under Mode I loading. Later a numerical model of SENT specimen was developed to determine the J integral and model was validated with the NTOD experimental results. The optimum values of the design parameters are found using Response Surface Methodology (RSM). It was found that, the specimen thickness and width have significant influence on all response parameters.