Effect of thermal residual stresses on the stress-strain behavior of metal-matrix composites
Loading...
Authors
Seigenthaler, Daniel M.
Subjects
thermal stresses
composites
finite element
composites
finite element
Advisors
Dutta, Indranath
Date of Issue
1991-06
Date
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
A phenomenological and parametric study was conducted to
assess the effect of thermal residual stresses on the stressstrain
response of a discontinuous fiber-reinforced metalmatrix
composite in tensile and compressive loading. The
material chosen for this investigation was the SiC-whisker
reinforced Al 6061. The difference between composite flow
behavior in tension and compression, as well as the effects of
volume fraction, fiber aspect ratio and fiber spacing were
analyzed within the framework of axisymmetric finite-element
models to determine the overall constituative response of the
composite and to solve for local field quantities in the fiber
and the matrix. The composite was modeled as a periodic array
of cylindrical fibers with perfect interfacial bonding and
complete fiber alignment with the tensile/compressive axis. It
was found that the presence of residual stresses affected the
stress-strain behavior of the composite by influencing the
load transfer characteristics between the matrix and the fiber
as well as the initiation and growth of the plastic
deformation in the matrix.
Type
Thesis
Description
Series/Report No
Department
Mechanical Engineering
Organization
Naval Postgraduate School
Identifiers
NPS Report Number
Sponsors
Funder
Format
78 p.;28 cm.
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.