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Influence of stacking sequence on scattering characteristics of the fundamental anti-symmetric Lamb wave at through holes in composite laminates
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10.1121/1.3533742
/content/asa/journal/jasa/129/3/10.1121/1.3533742
http://aip.metastore.ingenta.com/content/asa/journal/jasa/129/3/10.1121/1.3533742

Figures

Image of FIG. 1.
FIG. 1.

Schematic diagram of the configuration for FE simulations.

Image of FIG. 2.
FIG. 2.

(Color online) Typical contour snapshots of FE simulated out-of-plane displacement for the [45/ − 45/0/90]S composite laminate, (a) soon after excitation and (b) scattered wave from a through hole damage.

Image of FIG. 3.
FIG. 3.

(Color online) Schematic diagram of the experimental setup.

Image of FIG. 4.
FIG. 4.

(Color online) (a) Normalized incident Lamb wave at location r = 40 mm and θ = 0°, (b) group velocity dispersion curve at θ = 0°, and (c) normalized out-of-plane displacement amplitude as a function of wave propagation distance at θ = 0° in the [45/ − 45/0/90]S composite laminate.

Image of FIG. 5.
FIG. 5.

(Color online) Normalized polar directivity excitation amplitudefor a transducer located at r = 40 mmin a [45/ − 45/0/90]S composite laminate.

Image of FIG. 6.
FIG. 6.

(Color online) SDP for (a) 3 mm, (b) 5 mm, and (c) 8 mm diameter circular through hole damage in a [45/ − 45/0/90]S composite laminate by 140 kHz incident wave (FE simulation: line with empty circles, experiment: filled circles).

Image of FIG. 7.
FIG. 7.

(Color online) Normalized amplitude for (a) forward scattering, (b) backward scattering, and (c) backward to forward scattering ratio as a function of the through hole diameter to the wavelength ratio in the [45/ − 45/0/90]S composite laminate.

Image of FIG. 8.
FIG. 8.

(Color online) SDP of the [0]8, [0/90]2S, and [45/ − 45]2S composite laminates for R TW  = 1.0088.

Image of FIG. 9.
FIG. 9.

(Color online) SDP of the [0/45/90/ − 45]S, [0/90/45/ − 45]S, [90 /45/ − 45/0]S, [90/ − 45/0/45]S, [45/ − 45/0/90]S, and [45/90/ − 45/0]S composite laminates for R TW  = 1.0088.

Image of FIG. 10.
FIG. 10.

(Color online) Contour plot of normalized amplitude as a function of R TW and θfor the [0]8, [0/90]2S, and [45/ − 45]2S composite laminates.

Image of FIG. 11.
FIG. 11.

(Color online) Contour plot of normalized amplitude as a function of R TW and θ for the [0/45/90/ − 45]S, [0/90/45/ − 45]S, [90/45/ − 45 /0]S, [90/ − 45/0/45]S, [45/ − 45/0/90]S, and [45/90/ − 45/0]S composite laminates.

Image of FIG. 12.
FIG. 12.

(Color online) Normalized amplitude as a function of R TW for θ = 0 and 180°(solid line, [0]8; dashed line, [0/90]2S; dashed-dotted line, [45/ − 45]2S; filled circles, [0/45/90/ − 45]S; crosses, [0/90/45/ − 45]S; triangles, [90/45/ − 45/0]S; squares, [90/ − 45/0/45]S; circles, [45/ − 45 /0/90]S; and rhombus, [45/90/ − 45/0]S).

Tables

Generic image for table
TABLE I.

Effective material properties of Cycom® 970/T300 prepreg lamina.

Generic image for table
TABLE II.

Summary of composite laminates with different stacking sequences.

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/content/asa/journal/jasa/129/3/10.1121/1.3533742
2011-03-09
2014-04-23
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Influence of stacking sequence on scattering characteristics of the fundamental anti-symmetric Lamb wave at through holes in composite laminates
http://aip.metastore.ingenta.com/content/asa/journal/jasa/129/3/10.1121/1.3533742
10.1121/1.3533742
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