Optimization of material damping and stiffness of laminated fiber-reinforced composite structural elements
Two different approaches, laminated plate theory approach and energy approach, are used in conjunction with elastic-viscoelastic correspondence principle for the analysis of the material damping for fiber reinforced composites. Damping values obtained through these two approaches are close to each other under certain situations. A discontinuous fiber composites model is developed to determine the longitudinal modulus of discontinuous fiber reinforced composites. Aligned or off-axis unidirectional fiber composites, in-plane randomly oriented fiber composites, and several kinds of laminated fiber composites are considered in damping and stiffness analysis. Experimental results on damping and stiffness by the impulse hammer technique agree with the analytical results for unidirectional fiber composites and for certain cross ply fiber composites. In the energy approach, a three-dimensional finite element method based on three-dimensional elasticity is applied to determine the strain field of an elastic body. Dissipated energy can be determined through this strain field and loss moduli.
- Research Organization:
- Florida Univ., Gainesville (USA)
- OSTI ID:
- 7252643
- Country of Publication:
- United States
- Language:
- English
Similar Records
Laminate behavior for SiC fiber-reinforced reaction-bonded silicon nitride matrix composites
Optimization of internal damping in fiber reinforced composite materials