Modeling of the Thermomechanical Fatigue Behavior of Fiber-Reinforced Ceramic-Matrix Composites Subjected to Different Phase Angles
Publication: Journal of Aerospace Engineering
Volume 31, Issue 4
Abstract
Under thermomechanical fatigue (TMF) loading, the thermal cyclic temperature may change with decreasing or increasing applied stress upon unloading or reloading. The damage inside of fiber-reinforced ceramic-matrix composites (CMCs) is affected by the phase angle. In this paper, the thermomechanical fatigue behavior of fiber-reinforced CMCs corresponding to different phase angles of , , , and has been investigated. The damage accumulation processes considered the coupling effects of the temperature changing with applied stress in each applied cycle and the degradation of fiber/matrix interface shear stress with increasing applied cycles. The relationships between the thermomechanical fatigue damage mechanisms, hysteresis parameters (i.e., hysteresis energy and peak strain), phase angle, and interface damage condition have been established. The thermomechanical fatigue behavior for different fiber volume content, peak stress, and matrix crack spacing have been analyzed for different phase angles. The damage accumulation of cross-ply SiC/magnesium aluminosilicate (MAS) composite under thermomechanical fatigue loading have been predicted for different phase angles of and .
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Acknowledgments
The work reported here is supported by the Natural Science Foundation of Jiangsu Province (Grant No. BK20140813) and the Fundamental Research Funds for the Central Universities (Grant No. NS2016070). The author also wishes to thank three anonymous reviewers and editors for their helpful comments on an earlier version of the paper.
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Published In
Journal of Aerospace Engineering
Volume 31 • Issue 4 • July 2018
Copyright
©2018 American Society of Civil Engineers.
History
Received: Jul 5, 2017
Accepted: Jan 19, 2018
Published online: May 9, 2018
Published in print: Jul 1, 2018
Discussion open until: Oct 9, 2018
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