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TECHNICAL PAPERS: Heat Transfer in Manufacturing

Optimal Temperature and Current Cycles for Curing of Composites Using Embedded Resistive Heating Elements

[+] Author and Article Information
A. Mawardi, R. Pitchumani

Composites Processing Laboratory, Department of Mechanical Engineering, University of Connecticut, Storrs, CT 06269-3139

J. Heat Transfer 125(1), 126-136 (Jan 29, 2003) (11 pages) doi:10.1115/1.1527903 History: Received March 21, 2001; Revised August 12, 2002; Online January 29, 2003
Copyright © 2003 by ASME
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References

Ramakrishnan,  B., Zhu,  L., and Pitchumani,  R., 2000, “Curing of Composites Using Internal Resistive Heating,” J. Manuf. Sci. Eng., 122, pp. 124–131.
Zhu,  L., and Pitchumani,  R., 2000, “Analysis of a Process for Curing Composites by the Use of Embedded Resistive Heating Elements,” Compos. Sci. Technol., 60, pp. 2699–2712.
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Figures

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A curing process configuration with embedded resistive heating elements
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Illustration of (a) the three-stage piecewise constant cure current cycle and (b) the four-stage piecewise linear curve temperature cycle considered in the study
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Schematic diagram of simulated annealing optimization combined with simplex search algorithm
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Validation of the optimization results with the data from Ref. 2, for the resistive heating configuration using three carbon mats
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Optimal temperature and current cycles for curing a 1.27 cm-thick EPON-815/EPICURE-3274 laminate embedded with (a) 0 carbon mat, (b) 1 carbon mat, (c) 2 carbon mats, and (d) 3 carbon mats
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Optimal temperature and current cycles for curing a 1.27 cm-thick OC-E701/P16N/BPO laminate embedded with (a) 0 carbon mat, (b) 1 carbon mat, (c) 2 carbon mats, and (d) 3 carbon mats
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Optimal temperature and current cycles for curing a 1.27 cm-thick CYCOM-4102 laminate embedded with (a) 0 carbon mat, (b) 1 carbon mat, (c) 2 carbon mats, and (d) 3 carbon mats
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Optimal temperature and current cycles for curing a 1.27 cm-thick CYCOM-4102 laminate embedded with 1 carbon mat for different critical values of constraints
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Temperature history at various locations within the laminate during curing process using the optimal temperature and current cycles for a 1.27 mm-thick CYCOM-4102 laminate, for critical temperatures of: (a) 150°C and (b) 125°C
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Normalized optimal cure time as a function of dimensionless Damköhler number
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Normalized cure time and power consumption savings as a function of number of carbon mats, for (a) EPON-815/EPICURE-3274, (b) OC-E701/P16N/BPO, and (c) CYCOM-4102

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