Investigation of Effect of Grains on Deformation of Wood under Shearing Loads Using Electronic Speckle Pattern Interferometry

2006 ◽  
Vol 326-328 ◽  
pp. 43-46
Author(s):  
Eisaku Umezaki
Keyword(s):  
Pseudotsuga Menziesii ◽  
Speckle Pattern ◽  
Electronic Speckle Pattern Interferometry ◽  
Two Dimensional ◽  
Annual Rings

The two-dimensional deformation of wood with different grains under shearing loads was measured using an electronic speckle pattern interferometry (ESPI) technique. The radical, tangential and end sections of Douglas firs (Pseudotsuga menziesii) were used as specimens. Results revealed that the deformation values significantly vary for every part of the specimens, and the ring directions of earlywood and latewood, which compose the annual rings, have an effect on the two-dimensional deformation of wood.

Deformation Measurement of Wood Subjected to Shearing Loads Using Electronic Speckle Pattern Interferometry

2004 ◽  
Vol 261-263 ◽  
pp. 1659-1664
Author(s):  
Eisaku Umezaki ◽  
T. Suzuki
Keyword(s):  
Speckle Pattern ◽  
Longitudinal Direction ◽  
Deformation Measurement ◽  
Electronic Speckle Pattern Interferometry ◽  
Two Dimensional ◽  
Annual Rings

The two-dimensional deformation of wood under shearing loads is measured using an electronic speckle pattern interferometry (ESPI) technique. The radical and tangential sections of Douglas firs are used as specimens in the longitudinal direction. Results reveal that large two-dimensional deformation of the wood can be measured using the ESPI technique, the deformation values significantly vary for every part of the specimens, and the ring directions of earlywood and latewood, which compose the annual rings, have an effect on the two-dimensional deformation of wood.

Analytical and Experimental Studies of Orthotropic Corner-Supported Plates With Segmented In-Plane Actuators

2005 ◽  
Author(s):  
Hartono Sumali ◽  
Jordan E. Massad ◽  
Philip L. Reu ◽  
Pavel M. Chaplya ◽  
Jeffrey W. Martin
Keyword(s):  
Boundary Condition ◽  
Boundary Conditions ◽  
Speckle Pattern ◽  
Experimental Studies ◽  
Electronic Speckle Pattern Interferometry ◽  
Two Dimensional ◽  
Dimensional Array ◽  
Laboratory Setup

This paper outlines a model for a corner-supported, thin, rectangular bimorph actuated by a two-dimensional array of segmented, orthotropic PVDF laminates; it investigates the realization and measurement of such a bimorph. First, a model is derived to determine the deflected shape of an orthotropic laminate for a given distribution of voltages over the actuator array. Then, boundary conditions are realized in a laboratory setup to approach the theoretical corner-supported boundary condition. Finally, deflection measurements of actuated orthotropic PVDF laminates are performed with Electronic Speckle Pattern Interferometry and are compared to the model results.

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
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