MECHANICS OF CRACK BRIDGING UNDER DYNAMIC LOADS

Conference · Thu Feb 01 00:00:00 EST 2001

DOI:https://doi.org/10.1557/PROC-653-Z2.5· OSTI ID:774572

SRIDHAR, N

A bridging law for fiber reinforced composites under dynamic crack propagation conditions has been derived. Inertial effects in the mechanism of fiber pullout during dynamic propagation of a bridged crack are critically examined for the first time. By reposing simple shear lag models of pullout as problems of dynamic wave propagation, the effect of the frictional coupling between the fibers and the matrix is accounted for in a fairly straightforward way. The solutions yield the time-dependent relationship between the crack opening displacement and the bridging traction. Engineering criteria and the role of material and geometrical parameters for significant inertial effects are identified.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: US Department of Energy (US)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 774572
• Report Number(s): LA-UR-01-847; TRN: AH200121%%87
• Resource Relation: Journal Volume: 653; Conference: Conference title not supplied, Conference location not supplied, Conference dates not supplied; Other Information: PBD: 1 Feb 2001
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CRACK PROPAGATION
DYNAMIC LOADS
FIBERS
OPENINGS
SHEAR
WAVE PROPAGATION