Simulation and experimental study of flexible electret-based loudspeaker vibration modes by electronic speckle pattern interferometry

2010 ◽  
Author(s):  
Yu-Chi Chen ◽  
Te-Hsun Chen ◽  
Chih-Jen Chien ◽  
Wen-Chi Chang ◽  
Chih-Chiang Cheng ◽  
...  
Keyword(s):  
Experimental Study ◽  
Speckle Pattern ◽  
Electronic Speckle Pattern Interferometry ◽  
Vibration Modes

A Numerical and Experimental Study of Composite Plates with Delamination under Compression Load

2011 ◽  
Vol 393-395 ◽  
pp. 7-10
Author(s):  
Jiang Tao Ruan ◽  
Shi Bin Wang ◽  
Jing Wei Tong ◽  
Min Shen ◽  
Francesco Aymerich ◽  
...  
Keyword(s):  
Experimental Study ◽  
Finite Element ◽  
Speckle Pattern ◽  
Composite Plates ◽  
Electronic Speckle Pattern Interferometry ◽  
Low Velocity ◽  
Compression Load ◽  
Damage Data ◽  
Maximum Impact Force ◽  
The Impact

The results on a numerical and experimental study of graphite/epoxy composite plates [03/903]S are presented. Each specimen was firstly impacted by the low velocity with different energy level. Compression experiment based on carrier electronic speckle pattern interferometry (carrier-ESPI) is made for the post-impact composite plate. The finite element method (FEM) is used to gain further understanding of the deformation behavior of impacted specimens. The compressive deformation of various delaminated composite plates are analyzed with software ANSYS to see that the impact parameters and delamination damage data, such as impact energy, maximum impact force and delamination area, affect the deformation fields. In addition, the comparisons between the finite element results and experimental measurements are considered under different compression loads.

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