Nondestructive Determination of Elastic Constants of Composite Materials

Thumbnail Image
Date
1991
Authors
Wooh, S. C.
Daniel, I.
Major Professor
Advisor
Committee Member
Journal Title
Journal ISSN
Volume Title
Publisher
Authors
Research Projects
Organizational Units
Journal Issue
Is Version Of
Versions
Series
Series
Review of Progress in Quantitative Nondestructive Evaluation
Center for Nondestructive Evaluation

Begun in 1973, the Review of Progress in Quantitative Nondestructive Evaluation (QNDE) is the premier international NDE meeting designed to provide an interface between research and early engineering through the presentation of current ideas and results focused on facilitating a rapid transfer to engineering development.

This site provides free, public access to papers presented at the annual QNDE conference between 1983 and 1999, and abstracts for papers presented at the conference since 2001.

Department
Abstract

The anisotropy of fibrous composite materials makes it difficult to determine their elastic constants nondestructively. The unidirectional lamina, which is the basic building block of composite laminates and structures, is treated as a quasi-homogeneous orthotropic material. Determination of material properties of the unidirectional lamina is especially important because this characterization allows prediction of the properties of any multidirectional laminate. In general, the unidirectional lamina is characterized by nine independent elastic constants. Many composite materials, however, have the additional property of transverse isotropy. In such cases the number of independent constants is reduced to five. The objective of this study is to propose a method for determining these constants ultrasonically by measuring phase velocities and critical angles.

Comments
Description
Keywords
Citation
DOI
Copyright
Tue Jan 01 00:00:00 UTC 1991