A Study on the Vibration Characteristics of Symmetry and Asymmetry Laminated Composite Materials by Using ESPI

2007 ◽  
Vol 353-358 ◽  
pp. 2366-2370
Author(s):  
Kyung Min Hong ◽  
Young June Kang ◽  
Nak Kyu Park ◽  
Weon Jae Ryu
Keyword(s):  
Composite Materials ◽  
Real Time ◽  
Optical Measurement ◽  
Speckle Pattern ◽  
Laminated Composite ◽  
Vibration Characteristics ◽  
Electronic Speckle Pattern Interferometry ◽  
Full Field ◽  
Reinforced Plastics ◽  
Laminated Composite Materials

The ESPI (Electronic Speckle Pattern Interferometry) is a real-time, full-field, non-destructive optical measurement technique. In this study, ESPI was proposed for the purpose of vibration analysis for new and composite materials. Composite materials have various complicated characteristics according to the materials, orientations, stacking sequences of the ply and boundary conditions. Therefore, it was difficult to analyze composite materials. For efficient use of composite materials in engineering applications the dynamic behavior (i.e., natural frequencies and nodal patterns) should be informed. With the use of Time-Average ESPI, one could analyze vibration characteristics of composite material by real time easily. We manufactured two kinds of laminated composites (i.e., symmetry and asymmetry) which were consisted of CFRP (Carbon Fiber Reinforced Plastics) and the shape of the test piece was of rectangular form.

Thermal strain analysis of composite materials by electronic speckle pattern interferometry

2000 ◽  
Vol 14 (5) ◽  
pp. 477-482 ◽  
Author(s):  
Koung Suk Kim ◽  
Wan Shik Jang ◽  
Myung Seak Hong ◽  
Ki Soo Kang ◽  
Hyun Chul Jung ◽  
...  
Keyword(s):  
Composite Materials ◽  
Speckle Pattern ◽  
Thermal Strain ◽  
Strain Analysis ◽  
Electronic Speckle Pattern Interferometry

Stress and conditions of continuity of laminated composite materials

1974 ◽  
Vol 10 (4) ◽  
pp. 394-401 ◽  
Author(s):  
V. A. Kolgadin ◽  
G. P. Bogatyr' ◽  
V. I. �tokova
Keyword(s):  
Composite Materials ◽  
Laminated Composite ◽  
Laminated Composite Materials

Achieving of sandwich-like laminated composite materials for robust superhydrophobicity, rapid photochromism and photo-mask writable media

2022 ◽  
Author(s):  
Guofeng Zhang ◽  
Linqi Huang ◽  
Fuchao Yang
Keyword(s):  
Composite Materials ◽  
Laminated Composite ◽  
Switching Rate ◽  
Lotus Leaf ◽  
Water Properties ◽  
Laminated Composite Materials ◽  
Photochromic Materials ◽  
Poor Stability

Photochromic materials with anti-water properties have impressed practical values, but their applications are severely hindered by poor stability and slow colour-switching rate. Inspired by the superhydrophobicity of lotus leaf and...

Experimental Investigation of Impacted and Non-Impacted Composite Laminates under Compressive Loading

2011 ◽  
Vol 284-286 ◽  
pp. 607-610
Author(s):  
Jiang Tao Ruan ◽  
Min Shen ◽  
Jing Wei Tong ◽  
Shi Bin Wang ◽  
Francesco Aymerich ◽  
...  
Keyword(s):  
Composite Laminates ◽  
Optical Measurement ◽  
Speckle Pattern ◽  
Compressive Loading ◽  
Laminated Plates ◽  
Low Velocity Impact ◽  
Compressive Deformation ◽  
Electronic Speckle Pattern Interferometry ◽  
Low Velocity ◽  
The Impact

In this paper, the deformation measurements of impacted and non-impacted composite laminates under compressive loading are taken. [03/903]S orientated cross-ply laminated plates with impact delamination and without delamination are tested using an anti-buckling testing device in compression experiment. The delamination is induced by low-velocity impact test at the impact energy level of 3.105J. For both impacted and non-impacted specimens, the compressive deformation is measured by a carrier electronic speckle pattern interferometry (CESPI) optical measurement technique. It is found that the deformation behavior of the two specimens presents a mixed deformation mode. However, the delamination has significant effect on the compressive deformation of composite laminates.

Sign in / Sign up

Export Citation Format

Share Document