Type of Document	Master's Thesis
Author	Lhotellier, Frederic C.
URN	etd-02062013-040025
Title	Matrix-fiber stress transfer in composite materials elasto-plastic model with an interphase layer
Degree	Master of Science
Department	Engineering Science and Mechanics
Advisory Committee	Advisor Name Title Brinson, Halbert F. Committee Chair Dillard, David A. Committee Member Wightman, James P. Committee Member
Keywords	Fibrous composites
Date of Defense	1987-11-15
Availability	restricted
Abstract The matrix-fiber stress transfer in glass/epoxy composite materials was studied using analytical and experimental methods. The mathematical model that was developed calculates the stress fields in the fiber, interphase, and neighboring matrix near a fiber break. This scheme takes into account the elastic-plastic behavior of both the matrix and the interphase, and it includes the treatment of stress concentration near the discontinuities of the fibers. The radius of the libers and the mechanical properties of the matrix were varied in order to validate the mathematical model. The computed values for the lengths of debonding, plastic deformation, and elastic deformation in the matrix near the fiber tip were confirmed by measurements taken under polarized light on loaded and unloaded single fiber samples. The fiber-fiber interaction was studied experimentally using dog-bone samples that contained seven libers forming an hexagonal pattern.
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