Location

Brunswick, ME

Start Date

1-1-1997 12:00 AM

Description

To date, most high performance composite materials have been fabricated in the form of relatively thin panels of uniform thickness, parallel front and back surfaces and plies parallel to these surfaces. For such panels, with only moderate curvature, analyses assuming plane wave propagation can treat the plies as being piecewise flat with curvature effects neglected. However, as composites become thicker with nonparallel surfaces and nonparallel plies, these simplified analyses must be abandoned. Depending on the extent of the nonuniformity in ply orientation, ply curvature may introduce a considerable amount of ray bending in the propagation of acoustic waves through composites with complex geometries and ply orientations. Accordingly, a mathematical framework is needed to treat this problem so that efficient, cost-effective inspection procedures may be designed and optimized.

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

16B

Chapter

Chapter 5: Engineered Materials

Section

Composites

Pages

1107-1114

DOI

10.1007/978-1-4615-5947-4_144

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

The Effect of Ply Curvature on Acoustic Wave Propagation in Complex Composite Structures

Brunswick, ME

To date, most high performance composite materials have been fabricated in the form of relatively thin panels of uniform thickness, parallel front and back surfaces and plies parallel to these surfaces. For such panels, with only moderate curvature, analyses assuming plane wave propagation can treat the plies as being piecewise flat with curvature effects neglected. However, as composites become thicker with nonparallel surfaces and nonparallel plies, these simplified analyses must be abandoned. Depending on the extent of the nonuniformity in ply orientation, ply curvature may introduce a considerable amount of ray bending in the propagation of acoustic waves through composites with complex geometries and ply orientations. Accordingly, a mathematical framework is needed to treat this problem so that efficient, cost-effective inspection procedures may be designed and optimized.