Visualization of the engineering moduli of composites using measured ultrasonic velocities

Author

Handley, S.M. ; Miller, J.G. ; Barnes, A.E. ; Madaras, E.I.

Author_Institution

Dept. of Phys., Washington Univ., St. Louis, MO, USA

fYear

1990

fDate

4-7 Dec 1990

Firstpage

1061

Abstract

It is hypothesized that the impact of measurements of the properties of advanced composite materials can be substantially enhanced through the use of improved visualization techniques. Values of the elastic stiffness coefficients C₁₁, C₁₂, C₁₃, C₃₃, and C₄₄ were obtained from time-of-flight measurements on a set of three uniaxial graphite/epoxy samples obtained from NASA Langley Research Center. Three-dimensional representations of the phase velocity, slowness, group velocity, and the Young´s and shear moduli were derived from the measured elastic stiffness constants

Keywords

Young´s modulus; carbon fibre reinforced plastics; elastic moduli measurement; shear modulus; C; Young´s moduli; composite materials; elastic stiffness coefficients; engineering moduli; graphite fibre reinforced epoxy resin composites; group velocity; phase velocity; shear moduli; time-of-flight measurements; ultrasonic velocities; visualization techniques; Bonding; Composite materials; Mechanical factors; NASA; Phase measurement; Physics; Surface finishing; Ultrasonic variables measurement; Velocity measurement; Visualization;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 1990. Proceedings., IEEE 1990

Conference_Location

Honolulu, HI

Type

conf

DOI

10.1109/ULTSYM.1990.171525

Filename

171525