A combined experimental and finite element study to predict the failure mechanisms in SiC coated carbon/carbon composites at room and elevated temperatures under flexural loading

Journal Article · Thu Jul 01 00:00:00 EDT 1993 · Journal of Reinforced Plastics and Composites; (United States)

DOI:https://doi.org/10.1177/073168449301200708· OSTI ID:6185630

Mahfuz, H; Das, P S; Xue, D; Krishnagopalan, J; Jeelani, S ^[1]

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1. Tuskegee Univ., AL (United States)

Response of quasi-isotropic laminates of SiC coated Carbon/Carbon (C/C) composites have been investigated under flexural loading at various temperatures. Variation of load-deflection behavior with temperatures are studied. Increase in flexural strength and stiffness are observed with the rise in temperature. Extensive analyses through Optical Microscope (OM) and Non-Destructive Evaluation (NDE) have been performed to understand the failure mechanisms. Damage zone is found only within the neighborhood of the loading plane. Isoparametric layered shell elements developed on the basis of the first order shear deformation theory have been used to model the thin laminates of C/C under flexural loading. Large deformation behavior has been considered in the finite element analysis to account for the non-linearities encountered during the actual test. Data generated using finite element analysis are presented to corroborate the experimental findings, and a comparison in respect of displacement and stress-strain behavior are given to check the accuracy of the finite element analysis. Reasonable correlation between the experimental and finite element results have been established. 19 refs.

• OSTI ID: 6185630
• Journal Information: Journal of Reinforced Plastics and Composites; (United States), Vol. 12:7; ISSN 0731-6844
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COMPOSITE MATERIALS
FRACTURE MECHANICS
FAILURES
FINITE ELEMENT METHOD
CRACK PROPAGATION
NONDESTRUCTIVE TESTING
SILICON CARBIDES
THERMAL STRESSES
CALCULATION METHODS
CARBIDES
CARBON COMPOUNDS
MATERIALS
MATERIALS TESTING
MECHANICS
NUMERICAL SOLUTION
SILICON COMPOUNDS
STRESSES
TESTING
360603* - Materials- Properties