Application of a photoelastic coating method

2002 ◽  
Author(s):  
Cheng'ai Yan ◽  
Guanghong Fan ◽  
Yajun Li ◽  
Giangguo Li
Keyword(s):  
Photoelastic Coating ◽  
Coating Method

Experimental Analysis of Propagation of Plastic Zones in Two-Dimensional Problems

2012 ◽  
Vol 59 (4) ◽  
pp. 397-411
Author(s):  
Barbara Kozłowska
Keyword(s):  
Experimental Analysis ◽  
Residual Strain ◽  
Yield Condition ◽  
Experimental Tests ◽  
Two Dimensional ◽  
Stress Concentrators ◽  
Tensile Stresses ◽  
Photoelastic Coating ◽  
Coating Method ◽  
Plastic Zones

In the paper, the author presents experimental analysis of propagation of plastic zones in two-dimensional models with different stress concentrators. The experimental tests were carried out by photoelastic coating method on duralumin stripes loaded by tensile stresses. For various levels of loading, the photographs of isochromatic pattern were taken under loading and after removing loading. On the basis of isochromatic pattern recorded for loaded models, the boundaries of plastic zones were determined using the Treska-Coulomb yield condition. The isochromatic pattern taken for the unloaded, but previously partly plastified elements, show the picture of the residual strain remaining in the material. A discussion of the results is presented.

scholarly journals Full-field stress analysis by holographic phase-stepping implementation of the photoelastic-coating method

2012 ◽  
Vol T149 ◽  
pp. 014022 ◽  
Author(s):  
T Lyubenova ◽  
E Stoykova ◽  
B Ivanov ◽  
W Van Paepegem ◽  
A Degrieck ◽  
...  
Keyword(s):  
Stress Analysis ◽  
Full Field ◽  
Field Stress ◽  
Phase Stepping ◽  
Photoelastic Coating ◽  
Coating Method

Elastic-Plastic Behaviour of a Plate with a Central Hole by Photoelastic Coating Method

2006 ◽  
Vol 3-4 ◽  
pp. 27-32
Author(s):  
N. Matsumoto ◽  
S. Ohtaki ◽  
M. Ohira ◽  
H. Kasayama
Keyword(s):  
Image Processing ◽  
Biaxial Tension ◽  
General Procedure ◽  
Principal Strain ◽  
Elastic Plastic ◽  
Photoelastic Coating ◽  
Isochromatic Fringes ◽  
Coating Method ◽  
The Difference ◽  
Principal Strains

An application of the elastic-plastic problem by the photoelastic coating method is presented in this paper. A general procedure of this experiment, such as image processing and separation of the difference of principal strain to obtaine stresses from isochromatic fringes is referred. The methodology to extract centre lines of coloured isochromatic fringes is explained. Experiments are conducted with cross-shaped aluminum specimens with a circular hole subjected to uniaxial tension and equi-biaxial tension. Results of image processing are shown, and the distribution of difference of principal strains and separated principal strain are shown in the case of equi-biaxial tension.

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