scholarly journals Towards deconvolution to enhance the grid method for in-plane strain measurement

2014 ◽  
Vol 8 (1) ◽  
pp. 259-291 ◽  
Author(s):  
Frédéric Sur ◽  
Michel Grédiac
Keyword(s):  
Plane Strain ◽  
Strain Measurement ◽  
Grid 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

scholarly journals Sensitivity of in-Plane Strain Measurement to Calibration Parameter for out-of-Plane Specimen Rotations

2018 ◽  
Vol 58 (7) ◽  
pp. 1115-1132 ◽  
Author(s):  
F. Yasmeen ◽  
R. Balcaen ◽  
M.A. Sutton ◽  
D. Debruyne ◽  
S. Rajan ◽  
...  
Keyword(s):  
Plane Strain ◽  
Strain Measurement ◽  
Calibration Parameter ◽  
Out Of Plane ◽  
Plane Specimen

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.

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