Phenomenological Studies in Micromechanics
Abstract
State of the art experimental techniques have been applied to micromechanical measurements of advanced composite materials and structures. Moire interferometry has been used to determine the phenomenological nature of deformation of thick graphite epoxy laminates, and to measure representative mechanical properties. These properties include Young's modulus, Poisson's ratios, shear moduli and co-efficients of thermal expansion. Test methods used for the measurement of shear moduli have been evaluated and a new test configuration proposed. The photomechanics experiments uncovered and quantified edge effects which were also studied in detail numerically. The practical nature of stresses, which are held in some circles to be singular, was investigated and the scale over which these effects act was determined. It would appear that a very fine scale and extremely high local stress gradients occur. Micromechanics, Composites, Interlaminar, Displacement fields, Strains, Moire interferometry, Diffraction grating experimental methods.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 30, 1988
- Accession Number
- ADA201092
Entities
People
- D. Post
- R. Czarnek
Organizations
- Virginia Tech