Method for measuring residual stresses in materials by plastically deforming the material and interference pattern comparison

Patent · Sun Jan 01 00:00:00 EST 1995

OSTI ID:869979

Pechersky, Martin J ^[1]

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1. 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: Savannah River Site (SRS), Aiken, SC (United States)
• 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

Related Subjects

method
measuring
residual
stresses
materials
plastically
deforming
material
interference
pattern
comparison
stress
comprising
steps
establishing
speckle
surface
laser
heating
portion
infrared
deforms
comparing
patterns
deformation
subtracting
produce
fringe
serves
visual
quantitative
indication
degree
plasticized
responded
dung
enables
calculation
measuring residual
infrared laser
interference pattern
material comprising
fringe pattern
residual stress
quantitative indication
speckle pattern
plastically deforming
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