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Materials 2019, 12(2), 259; https://doi.org/10.3390/ma12020259

Process-Induced Stress and Deformation of Variable-Stiffness Composite Cylinders during Curing

1
School of materials science and engineering, Wuhan University of Technology, 122 Luoshi Road, Wuhan 430070, Hubei, China
2
State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122 Luoshi Road, Wuhan, 430070, Hubei, China
*
Author to whom correspondence should be addressed.
Received: 11 December 2018 / Revised: 4 January 2019 / Accepted: 10 January 2019 / Published: 14 January 2019
PDF [4328 KB, uploaded 14 January 2019]   |   Review Reports

Abstract

Predicting and controlling process-induced deformation of composites during cure can play a significant role in ensuring the accuracy of manufacture and assembly of composite structures. In this paper the parametric investigation on the process-induced stress and deformation of variable-stiffness composite cylinders was presented. The Kamal model was used to simulate the cure kinetic for carbon/ epoxy prepreg. A cure hardening instantaneously linear elastic (CHILE) constitutive model was adopted to determine the modulus of matrix resin. Self-consistent micro-mechanical models were employed to represent the mechanical properties and behaviors of the lamina. The three-dimensional model of a variable-stiffness composite cylinder was established using a linear fiber angle variation. The influence of the inner radius, the fiber end angle and the thickness on the stress and deformation of the variable-stiffness cylinder was evaluated using ABAQUS. The results show that the maximum stress increases with increases of the inner radius, the fiber end angle and the thickness. The inner radius of the cylinder have little effect on deformation, the deformation increases as the fiber end angle and the thickness increases. The present model and method can provide a useful tool for prediction of variable-stiffness composite cylinders.
Keywords: composite materials; variable stiffness; cylinder; process-induced deformation; curing composite materials; variable stiffness; cylinder; process-induced deformation; curing
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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Zhang, G.; Wang, J.; Ni, A. Process-Induced Stress and Deformation of Variable-Stiffness Composite Cylinders during Curing. Materials 2019, 12, 259.

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