Determination of johnson cook parameters in turning of micro and nano reinforced aluminum composites using trust region reflective algorithm

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Abstract

Accuracy of shear stress estimations plays a vital role in correct prediction of cutting forces in machining. In this study, efforts were directed to obtain better flow stress estimates through determination of novel Johnson Cook (JC) parameters for a number of micro and nano reinforced composite materials. Trust region reflective algorithm (non linear least squares) was used to determine optimum JC constants for each developed material subjected to varying machining parameters under high strain rate conditions. The newer JC constants yielded substantially better shear stress estimates as compared to base alloy JC constants; thus in turn improving cutting force predictability in machining of developed composite materials.

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Sekhar, R., & Singh, T. P. (2019). Determination of johnson cook parameters in turning of micro and nano reinforced aluminum composites using trust region reflective algorithm. International Journal of Innovative Technology and Exploring Engineering, 8(12), 1712–1716. https://doi.org/10.35940/ijitee.L3183.1081219

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