Viscoelastic Creep and Relaxation in Laminated Composites.
Abstract
An analytical method is presented to predict the viscoelastic creep and relaxation behavior of filamentary reinforced angle-ply laminates. Analytical methods based upon micromechanics are used to predict the time dependent properties of unidirectional fiber reinforced composite materials (i.e., relaxation moduli and creep compliances). A LINEAR, VISCOELASTIC, ORTHOTROPIC LAMINATE THEORY (including thermal effects) is mathematically formulated. A computational method is presented to solve the resulting convolution integral equations. Numerical results for both boron-epoxy and graphite- epoxy laminates at room temperature are presented and compared with limited experimental data. Additional experiments are recommended to obtain temperature dependence of the constituent materials, to verify the analytically predicted unidirectional viscoelastic properties of the composite material, and to verify the validity of the linear viscoelastic laminate theory. (Author-PL)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 30, 1971
- Accession Number
- AD0727120
Entities
People
- Edward J. Mcquillen
Organizations
- Naval Air Warfare Center Warminster