CN force predication model in milling of carbon fiber reinforced polymers

Devi Kalla; Prashant Lodhia; Bijay Bajracharya; Janet Twomey; Jamal Sheikh-Ahmad

doi:10.1117/12.632100

16 November 2005 CN force predication model in milling of carbon fiber reinforced polymers

Devi Kalla, Prashant Lodhia, Bijay Bajracharya, Janet Twomey, Jamal Sheikh-Ahmad

Proceedings Volume 5999, Intelligent Systems in Design and Manufacturing VI; 59990S (2005) https://doi.org/10.1117/12.632100
Event: Optics East 2005, 2005, Boston, MA, United States

Abstract

Fiber reinforced polymers are widely used in the transportation, aerospace and chemical industries. In rare instances these materials are produced net-shape, and secondary processing such as machining and assembly may be required to produce a finished product. Because fiber reinforced polymers are heterogeneous materials, they do not machine in a similar way to metals. Thus, the theory of metal machining is not valid for the analysis of machining of fiber- reinforced composites. Previous attempts in modeling this problem have adopted Merchant's theory from metal cutting by assuming that chip formation takes place in a shear plane which inclination angle is determined by the minimum energy principle. This class of models showed that model predictions are valid only for fiber orientations less than 60°. The work presented here focuses on providing predictive models for the cutting forces in unidirectional composites. The models are based on the specific cutting energy principle and account for a wide range of fiber orientations and chip thickness. Results from two forms of non-linear modeling methods, non-linear regression and committee neural networks, were compared. It was found that committee neural networks provide better prediction capability by smoothing and capturing the inherent non-linearity in the data. The model predictions were found to be in good agreement with experimental results over the entire range of fiber orientations from 0 to 180°.

Citation Download Citation

Devi Kalla, Prashant Lodhia, Bijay Bajracharya, Janet Twomey, and Jamal Sheikh-Ahmad "CN force predication model in milling of carbon fiber reinforced polymers", Proc. SPIE 5999, Intelligent Systems in Design and Manufacturing VI, 59990S (16 November 2005); https://doi.org/10.1117/12.632100

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