ELASTIC MODULI OF COMPOSITE MATERIALS REINFORCED WITH ORTHOTROPIC FILAMENTS.
Summary rept. for Aug-Nov 65,
AIR FORCE MATERIALS LAB WRIGHT-PATTERSON AFB OHIO
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Approximate equations for determining the elastic constants of a unidirectional composite material reinforced with an orthotropic filament are derived. In particular, equations are developed for longitudinal modulus, transverse modulus, Poissons ratio, and shear modulus. Filament and matrix elastic constants and fiber volume percent are the necessary parameters for determining these constants. Classical theory of elasticity is applied to a composite unit cell resulting in closed form solutions. Airy stress functions are applied to the fiber and matrix with boundary conditions requiring continuity of displacements across the fiber-matrix interface perfect bonding is assumed and continuity of appropriate stresses. Graphical results are shown for transverse modulus and shear modulus. Author
- Laminates and Composite Materials