Probabilistic models of the stress-rupture of composite materials: Phase III. Progress report, June 15, 1978-June 14, 1980

Technical Report · Sat Mar 01 00:00:00 EST 1980

DOI:https://doi.org/10.2172/5350348· OSTI ID:5350348

Phoenix, S. L.

The development of static and time dependent models for the failure of composite materials has been pursued. These models are based on the chain-of-bundles probability model for composite failure wherein local load sharing among non-failed fiber elements in a bundle plays a key role. At the outset, it was believed that the static model was well developed in the literature by others, and that work on the time dependent versions could proceed. In these versions, the viscoelasticity of the matrix was to be the cause of the time effects. Unfortunately, initial studies showed the published analysis on the static case to be superficial, and a rigorous extension to the time dependent case was not possible. A thorough investigation of the static model was carried out. Sophisticated analytical and numerical techniques were developed to treat the static model, and these show promise of being extendable to the time dependent case. Exact analysis has been performed on composites with few fibers to gain insight, and a powerful recursive technique has been developed to treat composites of larger sizes.

• Research Organization: Cornell Univ., Ithaca, NY (USA). Sibley School of Mechanical and Aerospace Engineering
• DOE Contract Number: EY-76-S-02-4027
• OSTI ID: 5350348
• Report Number(s): COO-4027-3
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
33 ADVANCED PROPULSION SYSTEMS
COMPOSITE MATERIALS
FAILURES
AUTOMOBILES
FATIGUE
FIBERS
FLYWHEELS
MATRIX MATERIALS
PRESSURE VESSELS
RUPTURES
CONTAINERS
MATERIALS
MECHANICAL ENERGY STORAGE EQUIPMENT
MECHANICAL PROPERTIES
REACTOR MATERIALS
VEHICLES
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