Elastic bridging for modeling fatigue crack propagation in a fiber-reinforced titanium matrix composite

Journal Article · Mon Jan 31 23:00:00 EST 1994 · Fatigue and Fracture of Engineering Materials and Structures

DOI:https://doi.org/10.1111/j.1460-2695.1994.tb00795.x· OSTI ID:135316

Nguyen, T H.B.; Yang, J M ^[1]

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1. Univ. of California, Los Angeles, CA (United States)

A model based upon linear elastic bridging and fiber crack tip shielding is proposed for predicting fatigue crack growth in a SCS-6/Ti-6-4 composite. The model is characterized by the fiber/matrix debond length rather than the fiber/matrix interfacial frictional shear strength used in most current fatigue models. Finite elements combined with fracture mechanics are applied for computing the local stress intensity. The local stress intensity in the matrix is then utilized to predict crack growth in the composite via comparison to monolithic fatigue crack propagation data for a similar Ti-6-4 matrix material. 19 refs.

• Sponsoring Organization: USDOE
• OSTI ID: 135316
• Journal Information: Fatigue and Fracture of Engineering Materials and Structures, Journal Name: Fatigue and Fracture of Engineering Materials and Structures Journal Issue: 2 Vol. 17; ISSN FFESEY; ISSN 8756-758X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
99 GENERAL AND MISCELLANEOUS
COMPOSITE MATERIALS
CRACK PROPAGATION
FINITE ELEMENT METHOD
FRACTURE MECHANICS
MATHEMATICAL MODELS
SHEAR PROPERTIES
TITANIUM ALLOYS