Combined loading fracture trajectories of viscoelastic materials.
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Authors
Marinshaw, Stephen Alfred Jr.
Subjects
crack propagation
finite-element analysis
fracture
fracture mechanics
fracture trajectories
propellant fracture
stress intensity factor
viscoelastic fracture
viscoelastic trajectories
finite-element analysis
fracture
fracture mechanics
fracture trajectories
propellant fracture
stress intensity factor
viscoelastic fracture
viscoelastic trajectories
Advisors
Lindsey, G.H.
Date of Issue
1973-06
Date
June 1973
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
The critical stress intensity factors and fracture
trajectories for both filled and unfilled viscoelastic plane
stress specimens were experimentally determined by
controlled crack elongation. Fracture testing included
combined displacement loadings both of single and
bi-material specimens with initial cracks located in each
material and at the bi-material interface.
The feasibility of trajectory prediction using an
elastic linear-strain finite-element analysis was
investigated. Techniques for adapting the elastic model
grid patterns to predict viscoelastic trajectories were
developed.
Measured trajectories correlated well with the
directions of maximum principal stress as determined by the
finite-element solution of a blunt crack- tip model.
Type
Thesis
Description
Series/Report No
Department
Aeronautics
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funder
Format
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.