The volume fraction of the fibers present in commercial filament wound structures, formed from either epoxy-impregnated tapes (“prepreg”) or fiber strands pulled through an epoxy bath, approaches 60 percent. Such close-packed structures are near the region that may cause dependent scattering effects to be important; that is, the scattering characteristics of one fiber may be affected by the presence of nearby fibers. This dependent scattering may change the single-fiber extinction coefficient and phase function, and thus may change the radiative transfer in such materials. This effect is studied for unidirectional fibers dispersed in a matrix with nonunity refractive index, and with large size parameter (fiber diameter to wavelength ratio) typical of commercial fiber–matrix composites. Only the case of radiation incident normal to the cylinder axes is considered, as this maximizes the dependent effects. The dependent extinction efficiency is found by solving the dispersion relations for the complex effective propagation constant of the composites. An estimation of this dependent scattering effect on the infrared in-situ curing of thermoset-hoop-wound structures is also conducted. It is found that the wave interference effect is significant for S-glass/3501-6 composite, and neglect of this effect tends to overestimate the temperature and cure state within the materials during IR in-situ curing.
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Thermal Analysis of In-Situ Curing for Thermoset, Hoop-Wound Structures Using Infrared Heating: Part II—Dependent Scattering Effect
B.-C. Chern,
B.-C. Chern
Everest Industrial Co., Inc., No. 669 Keng Tze Kou, Feng Keng Tsun, Hsin Feng Hsiang Hsinchu, Taiwan
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T. J. Moon,
T. J. Moon
Department of Mechanical Engineering, University of Texas at Austin, Austin, TX 78712
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J. R. Howell
J. R. Howell
Department of Mechanical Engineering, University of Texas at Austin, Austin, TX 78712
Search for other works by this author on:
B.-C. Chern
Everest Industrial Co., Inc., No. 669 Keng Tze Kou, Feng Keng Tsun, Hsin Feng Hsiang Hsinchu, Taiwan
T. J. Moon
Department of Mechanical Engineering, University of Texas at Austin, Austin, TX 78712
J. R. Howell
Department of Mechanical Engineering, University of Texas at Austin, Austin, TX 78712
J. Heat Transfer. Aug 1995, 117(3): 681-686 (6 pages)
Published Online: August 1, 1995
Article history
Received:
March 1, 1994
Revised:
January 1, 1995
Online:
December 5, 2007
Citation
Chern, B., Moon, T. J., and Howell, J. R. (August 1, 1995). "Thermal Analysis of In-Situ Curing for Thermoset, Hoop-Wound Structures Using Infrared Heating: Part II—Dependent Scattering Effect." ASME. J. Heat Transfer. August 1995; 117(3): 681–686. https://doi.org/10.1115/1.2822630
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