Method for measuring residual stresses in materials by plastically deforming the material and interference pattern comparison
Patent
·
OSTI ID:869979
- 241 Chardonnat La., Aiken, SC 29803
A method for measuring residual stress in a material comprising the steps of establishing a speckle pattern on the surface with a first laser then heating a portion of that pattern with an infrared laser until the surface plastically deforms. Comparing the speckle patterns before and after deformation by subtracting one pattern from the other will produce a fringe pattern that serves as a visual and quantitative indication of the degree to which the plasticized surface responded to the stress dung heating and enables calculation of the stress.
- Research Organization:
- WESTINGHOUSE SAVANNAH RIVER CO
- DOE Contract Number:
- AC09-89SR18035
- Assignee:
- Pechersky; Martin J. (241 Chardonnat La., Aiken, SC 29803)
- Patent Number(s):
- US 5432595
- OSTI ID:
- 869979
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
/356/73/
calculation
comparing
comparison
comprising
deformation
deforming
deforms
degree
dung
enables
establishing
fringe
fringe pattern
heating
indication
infrared
infrared laser
interference
interference pattern
laser
material
material comprising
materials
measuring
measuring residual
method
pattern
patterns
plastically
plastically deforming
plasticized
portion
produce
quantitative
quantitative indication
residual
residual stress
responded
serves
speckle
speckle pattern
steps
stress
stresses
subtracting
surface
visual
calculation
comparing
comparison
comprising
deformation
deforming
deforms
degree
dung
enables
establishing
fringe
fringe pattern
heating
indication
infrared
infrared laser
interference
interference pattern
laser
material
material comprising
materials
measuring
measuring residual
method
pattern
patterns
plastically
plastically deforming
plasticized
portion
produce
quantitative
quantitative indication
residual
residual stress
responded
serves
speckle
speckle pattern
steps
stress
stresses
subtracting
surface
visual