Surface wave utility in composite material characterization

Joseph L. Rose, Aleksander Pilarski, Yimei Huang

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

A surface wave velocity measurement technique is used to supply supporting measurements in the computation of elastic constants for practical nondestructive evaluation of composite materials. Theoretical modeling work is carried out to illustrate the surface wave velocity changes as a function of angle with respect to the axes along the fibers of a unidirectional graphite epoxy composite material for a variety of different problems, including porosity (PC) changes, fiber volume fraction (FF) changes, and delamination. Experiments are conducted on two unidirectional reinforced composites and a (0-90)s cross ply graphite epoxy laminate to illustrate the surface wave velocity measurements and the inverse computation procedure for evaluation of the stiffness coefficients. Variations of the feature values in the stiffness matrix are also discussed for inhomogeneities, delaminations through cracking, and large defects.

Original languageEnglish (US)
Pages (from-to)247-265
Number of pages19
JournalResearch in Nondestructive Evaluation
Volume1
Issue number4
DOIs
StatePublished - Dec 1990

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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