LPG fiber optic sensor applied to the flexural vibration monitoring and determination of dynamic Young’s modulus of woods

2020 ◽  
Author(s):  
L Mosquera ◽  
L. Yana ◽  
J. Basurto ◽  
Ana Torre
Keyword(s):  
Young’S Modulus ◽  
Fiber Optic ◽  
Young's Modulus ◽  
Flexural Vibration ◽  
Fiber Optic Sensor ◽  
Vibration Monitoring ◽  
Dynamic Young’S Modulus ◽  
Optic Sensor ◽  
Dynamic Young's Modulus

Correlation Analysis between Dynamic Young’s Modulus and Static MOE of the Poplar LVL Reinforced with Multilayer Fiberglass Mesh

2010 ◽  
Vol 26-28 ◽  
pp. 936-939
Author(s):  
Li Zhang ◽  
Ying Cheng Hu
Keyword(s):  
Correlation Analysis ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Dynamic Properties ◽  
Longitudinal Vibration ◽  
Flexural Vibration ◽  
Transmission Method ◽  
Vibration Method ◽  
Dynamic Young’S Modulus ◽  
Dynamic Young's Modulus

In this paper, the poplar LVL was reinforced with multilayer fiberglass mesh. The reinforcing effect of adding position of fiberglass mesh on improving the static MOE was studied. And three different nondestructive testing (NDT) methods, such as the longitudinal transmission method, longitudinal vibration method and flexural vibration method (out-plane and in-plane), were used to test the dynamic properties of the reinforced poplar LVL. The correlation analysis was implemented between the dynamic Young’s modulus and the static MOE of the reinforced poplar LVL. It can be concluded that the three NDT methods are useful for predicting the MOE of reinforced LVL, but the flexural and longitudinal vibration methods had better accuracy to estimate the MOE.

Study on Regeneration Pre-Sensitized Offset Plate Based on the Nondestructive Testing Method

2011 ◽  
Vol 380 ◽  
pp. 348-351 ◽  
Author(s):  
Jiang Chang ◽  
Xue Gong ◽  
Zhi Hui Sun
Keyword(s):  
Nondestructive Testing ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Longitudinal Vibration ◽  
Flexural Vibration ◽  
Vibration Method ◽  
Testing Method ◽  
Dynamic Young’S Modulus ◽  
Dynamic Young's Modulus ◽  
Nondestructive Testing Method

In this paper the vibration testing and Fast Fourier Transform(FFT) analysis detection on the basis of nondestructive testing method were analyzed. The dynamic Young’s modulus of the regeneration pre-sensitized offset plate were obtained by using the nondestructive testing methods, including the dynamic Young’s modulus by longitudinal vibration method, the dynamic Young’s modulus by out-plane flexural vibration method, and the dynamic Young’s modulus by in-plane flexural vibration method. The linear correlativity was investigated between the dynamic Young’s modulus and the modulus of elasticity(MOE) for the regeneration pre-sensitized offset plate.The linear correlations between the dynamic Young’s modulus and the MOE were good. So it is feasible to predict and analyze the plate mechanical properties put forward the nondestructive testing method of key mechanical performance parameters.

Relationships between Dynamic Young’s Modulus and Static MOE of the Reinforced Poplar LVL

2010 ◽  
Vol 129-131 ◽  
pp. 588-591
Author(s):  
Li Zhang ◽  
Ying Cheng Hu
Keyword(s):  
Nondestructive Testing ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Longitudinal Vibration ◽  
Flexural Vibration ◽  
Transmission Method ◽  
Reinforcing Effect ◽  
Vibration Method ◽  
Dynamic Young’S Modulus ◽  
Dynamic Young's Modulus

In this paper, the poplar LVL was reinforced with monolayer fiberglass mesh. The reinforcing effect of lay angle between the weft of fiberglass mesh and the veneer grain was studied. And three different nondestructive testing (NDT) methods, such as the longitudinal transmission method, longitudinal vibration method and flexural vibration method (out-plane and in-plane), were used to test the dynamic Young’s modulus of the reinforced poplar LVL. The correlativity was investigated between the dynamic Young’s modulus and the static MOE of the reinforced poplar LVL. The reinforcing effect was best when the lay angle of fiberglass mesh was 30°. And the flexural vibration method and longitudinal vibration method had better accuracy to estimate the static MOE.

Comparison of Young’s Moduli of Engineered Stones Using Different Test Methods

2013 ◽  
Vol 548 ◽  
pp. 220-230 ◽  
Author(s):  
João P. Lam dos Santos ◽  
Pedro M. Amaral ◽  
António Correia Diogo ◽  
Luís Guerra Rosa
Keyword(s):  
Young’S Modulus ◽  
Young's Modulus ◽  
Flexural Vibration ◽  
Test Methods ◽  
Static Deformation ◽  
Dynamic Young’S Modulus ◽  
Young’S Moduli ◽  
Four Point Bending ◽  
Dynamic Young's Modulus ◽  
Deformation Tests

This work reports the results of Young’s modulus of elasticity obtained for 3 types of engineered stones. Using parallelepiped specimens with dimensions 150  30  20 mm3, Young’s modulus is determined by different methods: static and dynamic. Via quasi-static deformation tests: - uniaxial tension, - uniaxial compression, and, - pure bending (i.e. symmetrical four-point bending), determination of Young’s modulus was carried out by means of the conventional electric-resistance extensometry with strain-gauge strips glued to the specimens. The results obtained from these quasi-static deformation tests are compared with the results of dynamic Young’s modulus obtained with RFDA equipment (Resonant Frequency & Damping Analyser) using the parallelepiped specimens in a flexural vibration mode. Dynamic Young’s modulus was also evaluated through measurements of ultrasonic pulses velocity. Composition and microstructures of the materials under investigation are also presented and discussed.

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