scholarly journals Dispersed Sensing Networks in Nano-Engineered Polymer Composites: From Static Strain Measurement to Ultrasonic Wave Acquisition

Sensors ◽  
2018 ◽  
Vol 18 (5) ◽  
pp. 1398 ◽  
Author(s):  
Yehai Li ◽  
Kai Wang ◽  
Zhongqing Su
Keyword(s):  
Polymer Composites ◽  
Ultrasonic Wave ◽  
Strain Measurement ◽  
Static Strain

Static strain measurement with submicro strain resolution and large dynamic range using twin grating Fabry-Perot sensor

2001 ◽  
Author(s):  
Mikhail G. Shlyagin ◽  
Pieter L. Swart ◽  
Serguei V. Miridonov ◽  
Anatoli A. Chtcherbakov ◽  
Ileana Marquez Borbon ◽  
...  
Keyword(s):  
Strain Measurement ◽  
Dynamic Range ◽  
Large Dynamic Range ◽  
Static Strain ◽  
Fabry Perot

π-phase-shifted FBG for improving static-strain measurement resolution based on triangle-wave laser tuning technique

2014 ◽  
Author(s):  
Wenzhu Huang ◽  
Wentao Zhang ◽  
Tengkun Zhen ◽  
Ce Bian ◽  
Yanliang Du ◽  
...  
Keyword(s):  
Strain Measurement ◽  
Static Strain ◽  
Measurement Resolution ◽  
Wave Laser ◽  
Laser Tuning

scholarly journals Transition Time of Ultrasonic Wave as a Tool of Quality Evaluation of Layered Polymer Composites

2017 ◽  
Vol 42 (3) ◽  
pp. 499-506 ◽  
Author(s):  
Małgorzata Szymiczek
Keyword(s):  
Polymer Composites ◽  
Ultrasonic Wave ◽  
Quality Evaluation ◽  
Bending Strength ◽  
Physical Nature ◽  
Ultrasonic Waves ◽  
Transition Time ◽  
Material Structure ◽  
Sound Waves ◽  
Layered Polymer Composites

AbstractObservation of behaviour phenomena of ultrasonic waves in an object allows for quality assessment, identification and location of discontinuity. Physical nature of acoustic processes is based on propagation of mechanical waves constituting a disturbance of equilibrium of the state of material. The acoustic process identified by selected characteristics can be a source of information about state of material, its structure, and properties, which is particularly important for systems exhibiting anisotropy properties, and such are layered polymer composites. They are special materials because their properties depend greatly on the manufacturing technology. Therefore, while conducting acoustic tests which use the influence of elastic properties and homogeneity of material structure for propagation of sound waves the adopted method of measuring characteristics which identifies propagation of ultrasonic wave phenomenon is of particular importance. The aim of the work was quality evaluation of layered polymer composites made by winding and press moulding by the method of echo and C-scan, using head Phased Array. Composites have been tested by thermal and fatigue degradation. Quality evaluation has been made based on the transition time of the ultrasonic wave and the bending strength.

${\pi}$-Phase-Shifted FBG for High-Resolution Static-Strain Measurement Based on Wavelet Threshold Denoising Algorithm

2014 ◽  
Vol 32 (22) ◽  
pp. 4294-4300 ◽  
Author(s):  
Wenzhu Huang ◽  
Wentao Zhang ◽  
Tengkun Zhen ◽  
Fusheng Zhang ◽  
Fang Li
Keyword(s):  
High Resolution ◽  
Strain Measurement ◽  
Static Strain
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