Abstract
This paper suggests a new manufacturing and freezing technology for photoelastic materials which produces stress-optical coefficient ratios,B/A, different from −0.5. By means of the absolute relardation method and the immersion method, the complete experimental stress solutions for the sphere under diametrical compression and for the closure head of a high-pressure vessel have been found.
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Abbreviations
- A,B :
-
stress-optical coefficients
- σ i,σj,σk :
-
principal stresses
- n o :
-
index of refraction of materials in unstressed state
- n i, nj, nk :
-
indices of refraction of materials in stressed state in the direction of principal stress or secondary principal stress
- δ:
-
absolute retardation
- λ:
-
wavelength
- σ r,σt,σy :
-
radial, circumferential and axial stresses
- N x, Ny :
-
fringe orders of the absolute retardation inx-andy-directions
- N t, Nr :
-
fringe orders of isochromatics in circumferential and radial directions
- D, d :
-
diameter
- R, r :
-
radius
- R o :
-
radius of sphere
- t :
-
thickness of model or slice
- \(\bar \sigma _r \) :
-
average stress,\(\bar \sigma = P/\pi R_o ^2 \)
- f :
-
fringe value of the material
- C=B/A :
-
stress-optical coefficient ratio
- ν:
-
Poisson's ratio
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Fu-lung, D., Kuo-cheng, C. Use of the holophotoelastic method for three-dimensional stress analysis. Experimental Mechanics 22, 468–475 (1982). https://doi.org/10.1007/BF02325425
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DOI: https://doi.org/10.1007/BF02325425