Abstract
A short-term anisotropiccreep behavior of a unidirectional carbon fiber-reinforced polymer matrix composite T800H/Epoxy under constant and variable loading conditions at 1000°C was examined. Constant-stress creep tests in tension were first performed at three different stress levels for five hours on off-axis plain coupon specimens with various fiber orientation angles: θ = 0, 10, 30, 45 and 90°. Then, creep deformations of off-axis plain coupon specimens subjected to a single step change, either increase or decrease, in stress were measured to observe effects of load histories on the off-axis tensile creep for the unidirectional composite. Off-axis creep recovery after completely removing the creep stress for each of the tensile creep tests was also observed for five hours at the same temperature. To evaluate effects of the physical aging of matrix resin, moreover, tensile flow curves of off-axis specimens preconditioned in the same test environment for different periods of time before testing were compared On the basis of these experimental results, capabilities required by a desired inelastic constitutive model for describing a matrix-dominated anisotropic creep behavior of unidirectional polymer matrix composites were elucidated Finally, an attempt to develop an anisotropic constitutive model that fulfilled some of the requirements was made.
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Kawai, M. (2001). Off-Axis Creep Behavior of Unidirectional Polymer Matrix Composites at High Temperature. In: Murakami, S., Ohno, N. (eds) IUTAM Symposium on Creep in Structures. Solid Mechanics and its Applications, vol 86. Springer, Dordrecht. https://doi.org/10.1007/978-94-015-9628-2_45
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DOI: https://doi.org/10.1007/978-94-015-9628-2_45
Publisher Name: Springer, Dordrecht
Print ISBN: 978-90-481-5623-8
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