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Composites: Mechanics, Computations, Applications: An International Journal
ESCI SJR: 1.182 SNIP: 0.125 CiteScore™: 0.23

ISSN 印刷: 2152-2057
ISSN オンライン: 2152-2073

Composites: Mechanics, Computations, Applications: An International Journal

DOI: 10.1615/CompMechComputApplIntJ.2018018555
pages 93-116

STORAGE AND LOSS MODULI OF CSM COMPOSITES IN THE GLASS-TRANSITION REGION AS DEFINED BY THE INTERPHASE CONCEP

Emilio Sideridis
School of Applied Mathematics and Physical Sciences NTUA, Section of Mechanics, 5 Heroes of Polytechnion Ave., GR—15773 Athens, Greece
https://www.researchgate.net/profile/Aimilios_Sideridis
J. Venetis
School of Applied Mathematics and Physical Sciences NTUA, Section of Mechanics, 5 Heroes of Polytechnion Ave., GR—15773 Athens, Greece

要約

In this paper, a reliable three-layer model to simulate the periodic structure of a general type of fibrous composites reinforced with randomly oriented short fibers, chopped strand mat (CSM), was taken into account. Hence, the overall material was considered to consist of three separate phases. The central role here is assigned to the intermediate phase lying between the matrix and fibers, named the interphase. This phase has variable properties depending on the properties of the main phases and the mode of preparation of the composite material. In this context, a qualitative study of the storage/loss moduli and loss factor of the composite in the glass-transition region was performed. The glass-transition temperature is defined as the point at which the specific volume versus the temperature curve changes abruptly, and it marks the region of nature between rubberypolymer and glassypolymer. Thus, the thermomechanical behavior of CSM composites was investigated in the transition region. Examination of the glass-transition temperature, which constitutes the upper limit for the structurally important glassy region through the loss factor, was performed by considering this temperature as a combination of the glass-transition temperature of matrix and interphase.


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