scholarly journals The Grid Method for In-plane Displacement and Strain Measurement: A Review and Analysis

Strain ◽  
2016 ◽  
Vol 52 (3) ◽  
pp. 205-243 ◽  
Author(s):  
M. Grédiac ◽  
F. Sur ◽  
B. Blaysat
Keyword(s):  
Strain Measurement ◽  
Grid Method ◽  
Plane Displacement

A New Direct Strain Measurement Using Optical Grid Method

2014 ◽  
Author(s):  
Bing Zhao ◽  
GuoBiao Yang
Keyword(s):  
Strain Measurement ◽  
Grid Method ◽  
Matrix Decomposition ◽  
Matrix Inversion ◽  
Uniaxial Tensile ◽  
Uniaxial Tensile Test ◽  
Rotation Effect ◽  
Displacement Fields ◽  
Optical Grid ◽  
Strain Determination

Normally the strain field is indirectly determined by differentiating the displacement fields. This indirect method always suffers from noise, and the shear strain accuracy is poor due to the rigid body rotation effect. In this paper, a direct strain measurement method based on affine transform matrix decomposition is introduced. A new method for strain matrix inversion without determining the rotation is proposed. This can be used for both local and global 2D/3D strain determination. A uniaxial tensile test with grid measurement technique is carried out to validate this method.

Investigation of the grid method for accurate in-plane strain measurement

2009 ◽  
Vol 20 (9) ◽  
pp. 095102 ◽  
Author(s):  
C Badulescu ◽  
M Grédiac ◽  
J D Mathias
Keyword(s):  
Plane Strain ◽  
Strain Measurement ◽  
Grid Method
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