Load Transfer and Surface Wave Propagation in Fiber Reinforced Composite Materials.
Abstract
A system of linear elastic equations recently obtained for fiber reinforced composite materials is applied to some simple problems concerning the transfer of load from the reinforcement to the matrix. The same equations are applied to surface waves propagating in the direction of the fiber reinforcement. Since the defined constants occurring in the above-mentioned linear equations for a two-constituent composite material have never been measured, calculations cannot be performed. When the model is simplified sufficiently, the effective constants in the description can be partially estimated from the known elastic constants of the individual constituent in the composite. With the reduced equations calculations are performed for surface waves propagating both in and normal to the direction of the fiber reinforcement. The calculations indicate the existence of a high (optical type) as well as a low (acoustic type) surface wave mode, both of which are dispersive. It is believed the optical type mode is an analytical consequence of the simplified model and does not actually exist. The dispersion of the acoustic type surface wave mode could provide a means of non-destructively evaluating the integrity of a fiber reinforced composite material. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1977
- Accession Number
- ADA039046
Entities
People
- Harry F. Tiersten
- M. Jahanmir
Organizations
- Rensselaer Polytechnic Institute