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Polymers 2016, 8(3), 72; doi:10.3390/polym8030072

Processing-Induced Inhomogeneity of Yield Stress in Polycarbonate Product and Its Influence on the Impact Behavior

Engineering Simulation and Aerospace Computing (ESAC), Northwestern Polytechnical University, Xi’an 710072, China
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Academic Editor: Xianqiao Wang
Received: 14 January 2016 / Revised: 14 February 2016 / Accepted: 26 February 2016 / Published: 4 March 2016
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Abstract

In this study, an integrated methodology for impact analysis of polycarbonate (PC) product is proposed which incorporates the processing-induced inhomogeneity of yield stress. A previously developed model is extended to predict the inhomogeneous yield stress distribution along the specimen by using the thermal history experienced during injection molding. A strain rate-dependent elastic-plastic model combining the processing-induced yield stress is applied to model the mechanical behavior of PC. Finite element simulation for notched Izod impact test is then conducted to analyze the impact behaviors of PC specimens with different thermal histories. Numerical results of the fracture energies are compared with experimental measurements. View Full-Text
Keywords: polycarbonate; injection molding process; yield stress; inhomogeneity; Izod impact; finite element simulation polycarbonate; injection molding process; yield stress; inhomogeneity; Izod impact; finite element simulation
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Xu, Y.; Lu, H.; Gao, T.; Zhang, W. Processing-Induced Inhomogeneity of Yield Stress in Polycarbonate Product and Its Influence on the Impact Behavior. Polymers 2016, 8, 72.

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