Interfacial shear debonding problems in fiber-reinforced ceramic composites

Journal Article · Fri May 22 04:00:00 EDT 1998 · Acta Materialia

DOI:https://doi.org/10.1016/S1359-6454(98)00008-1· OSTI ID:619545

Hsueh, C H; Becher, P F ^[1]

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1. Oak Ridge National Lab., TN (United States). Metals and Ceramics Div.

Toughening of fiber-reinforced ceramic composites by fiber pullout relies on mode II debonding at the fiber/matrix interface. This mode II debonding has been analyzed using the strength-based and the energy-based criteria, in which the interfacial shear strength and the interface debond energy are respectively adopted to characterize the debonding behavior. Using the concept of Griffith theory, an effective circumferential defect at the interface is defined to account for the stress intensity due to the presence of the fiber in the matrix and the fiber-pullout geometry. This effective circumferential defect is then used to derive the relation between the interfacial shear strength and the interface debond energy. Also, the condition of interfacial debonding vs fiber fracture for a bridging fiber behind the crack tip is established using the energy-based criterion.

• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC05-96OR22464
• OSTI ID: 619545
• Journal Information: Acta Materialia, Journal Name: Acta Materialia Journal Issue: 9 Vol. 46; ISSN 1359-6454; ISSN ACMAFD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COMPOSITE MATERIALS
CRACK PROPAGATION
FAILURES
FRACTURE MECHANICS
INTERFACES
SHEAR PROPERTIES