The Elastic Moduli of a Fiber-Reinforced Composite

1977 ◽  
Vol 44 (1) ◽  
pp. 61-67 ◽  
Author(s):  
A. K. Mal ◽  
A. K. Chatterjee
Keyword(s):  
Spatial Distribution ◽  
Physical Properties ◽  
Elastic Moduli ◽  
Composite Model ◽  
Elastic Matrix ◽  
Circular Cylinders ◽  
Fiber Reinforced Composite ◽  
Reinforced Composite ◽  
The Matrix ◽  
Approximate Formulas

A composite consisting of a homogeneous isotropic elastic matrix containing infinitely long parallel circular cylinders is considered. The cylindrical fibers have identical physical properties and are firmly bonded to the matrix with uniform spatial distribution. Only plane problems are considered. Approximate formulas for the three average elastic moduli of the composite are derived by retaining the interaction between the fibers. The interaction effects are explicitly calculated as functions of the spacing between the fibers. Numerical results for a specific composite model are given.

A Study of the Fiber-Matrix Interface in Composite Materials

1992 ◽  
Vol 59 (2S) ◽  
pp. S163-S165 ◽  
Author(s):  
Jin O. Kim ◽  
Haim H. Bau
Keyword(s):  
Composite Materials ◽  
Experimental Technique ◽  
Stress Waves ◽  
Matrix Interface ◽  
Fiber Reinforced ◽  
Fiber Reinforced Composite ◽  
Reinforced Composite ◽  
The Matrix ◽  
Fiber Matrix Interface ◽  
Dispersion And Attenuation

A novel experimental technique for studying the characteristics of the interface between the fibers and the matrix in both undamaged and damaged fiber-reinforced composite materials is described. The experimental technique involves the transmission of stress waves in one or more fibers of the composite. The characteristics of the stress waves, such as speed, dispersion, and attenuation, are measured. These measured variables can be correlated with the characteristics of the bonding between the fiber and the matrix.

Creep-Fatigue Resistance of a Nickel-Aluminide

1988 ◽  
Vol 133 ◽  
Author(s):  
J. K. Tien ◽  
R. S. Bellows
Keyword(s):  
Fatigue Resistance ◽  
Nickel Aluminide ◽  
Fatigue Behavior ◽  
Mean Stress ◽  
Fiber Reinforced Composite ◽  
Reinforced Composite ◽  
Temperature Regimes ◽  
Creep Fatigue ◽  
The Matrix ◽  
Stress Damage

ABSTRACTA modified fatigue test matrix that provided both creep (high mean stress) and fatigue (alternating stress) damage was used to evaluate the creep-fatigue behavior of D.S. Ni3 Al(B,Hf). The three generic regimes of below, at, and above peak yield strength temperature were investigated. It was found that the creep-fatigue resistance of this intermetallic remains high through the three temperature regimes, allowing it to be further considered as a monolith or as the matrix of high-temperature fiber reinforced composite.

Mechanical and Thermoviscoelastic Behavior of Clay/Epoxy Nanocomposites

2002 ◽  
Vol 740 ◽  
Author(s):  
Jandro L. Abot ◽  
Asma Yasmin ◽  
Isaac M. Daniel
Keyword(s):  
Mechanical Properties ◽  
Elastic Modulus ◽  
Clay Content ◽  
Fiber Reinforced Composite ◽  
Pure Epoxy ◽  
Reinforced Composite ◽  
Thermosetting Polymers ◽  
The Matrix ◽  
Inorganic Nanocomposites ◽  
Strength And Ductility

ABSTRACTThe study of organic-inorganic nanocomposites has become relevant in recent years since these materials exhibit synergistic properties derived from the two components. Thermosetting polymers like epoxies that have high mechanical properties provide a baseline for further improvement with the addition of nanoclay particles. These nanocomposites can be used as the matrix of a fiber reinforced composite and lead to higher matrix dominated mechanical properties including elastic modulus, strength and fracture toughness. This study concentrates on the mechanical and thermoviscoelastic properties in the glassy regime of nanocomposites prepared by direct mixing. The elastic modulus of the nanocomposites was found to improve with respect to the pure epoxy modulus at the expense of both tensile strength and ductility regardless of clay content. The glass transition temperature was also found to decrease as well. The morphology of the nanocomposites was studied and correlated with the aforementioned properties.

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