scholarly journals Computed Linear/nonlinear Acoustic Response of a Cascade for Single/multi Frequency Excitation

2004 ◽  
Author(s):  
M Nallasamy ◽  
R Hixon ◽  
S Sawyer
Keyword(s):  
Acoustic Response ◽  
Frequency Excitation ◽  
Nonlinear Acoustic

Analysis of Vibro-Acoustic Modulations in Nonlinear Acoustics Used for Impact Damage Detection - Numerical and Experimental Study

2013 ◽  
Vol 558 ◽  
pp. 341-348 ◽  
Author(s):  
Łukasz Pieczonka ◽  
Andrzej Klepka ◽  
Wieslaw Jerzy Staszewski ◽  
Tadeusz Uhl ◽  
Francesco Aymerich
Keyword(s):  
Experimental Study ◽  
Finite Element ◽  
Composite Plate ◽  
Natural Frequencies ◽  
Impact Damage ◽  
Low Frequency ◽  
Fe Modeling ◽  
Low Frequency Vibration ◽  
Frequency Excitation ◽  
Nonlinear Acoustic

The paper investigates experimentally the effect of low-frequency vibration on nonlinear vibro-acoustic wave modulations applied to the detection of Barely Visible Impact Damage (BVID) in a composite plate. Finite Element (FE) modeling was used in a pretest stage to identify different motion scenarios of delaminated surfaces and relate them to natural frequencies of the damaged plate. In particular the opening-closing and frictional sliding actions of the defected interfaces have been considered. Subsequently, the identified frequencies have been used for low frequency excitation in nonlinear acoustic experiments on a composite plate with impact damage.

The stable nonlinear acoustic response of free-floating lipid-coated microbubbles

2014 ◽  
Vol 135 (4) ◽  
pp. 2310-2311
Author(s):  
Ying Luan ◽  
Guillaume Renaud ◽  
Tom Kokhuis ◽  
Antonius van der Steen ◽  
Nico de Jong
Keyword(s):  
Acoustic Response ◽  
Nonlinear Acoustic

Nonlinear Acoustic Response in thin Oxide Layers on Fused Silica

1996 ◽  
Vol 436 ◽  
Author(s):  
C. R. Ottermann ◽  
S. U. Fassbender ◽  
W. Arnold ◽  
K. Bange
Keyword(s):  
Scratch Test ◽  
Fused Silica ◽  
Test Method ◽  
Film Material ◽  
Acoustic Response ◽  
Layered Systems ◽  
Adhesion Properties ◽  
Nonlinear Mechanical ◽  
Nonlinear Acoustic ◽  
Film Substrate

AbstractNonlinear mechanical properties of layered systems of Ta2O5 and TiO2 films deposited on fused silica by reactive evaporation (RE), reactive ion plating (IP) and spin coating (SC) are investigated by means of an ultrasonic technique. The coatings with thickness of 100 nm possess differences in density and crystal structure, due to the different deposition conditions. The nonlinear acoustic response of the film/substrate systems depends on film material. Differences are observed in respect to film density as obtained by the alternate deposition methods. The origin of the differences in nonlinear acoustic response of the samples is discussed. The results are correlated to adhesion properties of the films determined by a scratch-test method.

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