Coefficient of thermal expansion evolution for cryogenic preconditioned hybrid carbon fiber/glass fiber-reinforced polymeric composite materials |
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Authors: | D Luca Motoc J Ivens N Dadirlat |
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Institution: | 1. Department of Automotive and Mechanical Engineering, Transilvania University of Brasov, Eroilor Av., 50017, Brasov, Romania 2. Katholieke University of Leuven, Kasteelpark Arenberg, 3001, Louvain, Belgium 3. Arplama Group, 86 Tudor Vladimirescu St., Fagaras, Romania
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Abstract: | Polymeric matrix composites are susceptible to degradation and material properties changes if subjected to low-temperature environmental conditions. This paper attempts to present a study on effective coefficient of thermal expansion for various hybrid carbon fibers/glass fibers polymeric composite structures previously subjected to low-temperature environmental conditioning. The hybrid composite architectures were made from various layers of glass mat and/or glass woven embedded along with layers of unidirectional carbon fibers into a polymeric matrix. The samples were preconditioned to a low-temperature environment at a constant temperature of ?35 °C for 1-week long, 24 h/day. The instantaneous CTE and thermal strain fields were recorded with a DIL 402 PC/1 dilatometer from Netzsch GmbH (Germany) by setting a monotonically linear rise of temperature from 20 to 250 °C, at a rate of 1 °C min?1. The experimentally retrieved data were compared with the values obtained by running a micromechanical-based approach simulation on a representative volume element. |
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