Probabilistic models of the stress-rupture of composite materials: Phase IV. Progress report, June 15, 1980-June 14, 1981

Technical Report · Sun Mar 01 04:00:00 EST 1981

OSTI ID:6509046

Phoenix, S L

The building blocks of most composite structures are simply bundles of brittle fibers impregnated with a flexible matrix. The tensile failure of these bundles is a complex statistical process involving scattered failure of the fibers at flaw sites, the overloading of neighboring fibers at these sites by way of stress transfer through the matrix, and the growth of sequences of adjacent fiber breaks to some unstable size. Fracture results from the growth of a catastrophic crack from one of these failure sequences. Time dependent failure under load (stress-rupture) results from a combination of time dependent growth of the flaws in the fiber and viscoelastic creep in the matrix; this creep causes a slowly changing pattern of stress redistribution around fiber breaks.

• Research Organization: Cornell Univ., Ithaca, NY (USA). Sibley School of Mechanical and Aerospace Engineering
• DOE Contract Number: AS02-76ER04027
• OSTI ID: 6509046
• Report Number(s): DOE/ER/04027-T1; COO-4027-4
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360303* -- Composite Materials-- Mechanical Properties-- (-1987)
ARAMIDS
COMPOSITE MATERIALS
FAILURES
FRACTURE PROPERTIES
MATERIALS
MECHANICAL PROPERTIES
PETROCHEMICALS
PETROLEUM PRODUCTS
PLASTICS
RESEARCH PROGRAMS
RUPTURES
STRESSES
SYNTHETIC MATERIALS
TENSILE PROPERTIES