GB919215A - Photoelastimetric method and apparatus - Google Patents
Photoelastimetric method and apparatusInfo
- Publication number
- GB919215A GB919215A GB996260A GB996260A GB919215A GB 919215 A GB919215 A GB 919215A GB 996260 A GB996260 A GB 996260A GB 996260 A GB996260 A GB 996260A GB 919215 A GB919215 A GB 919215A
- Authority
- GB
- United Kingdom
- Prior art keywords
- piece
- test
- ray
- directed
- analyser
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/21—Polarisation-affecting properties
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
- G01B11/18—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge using photoelastic elements
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Polarising Elements (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
919,215. Polarizing apparatus. BUDD CO. March 21, 1960 [March 21, 1959], No. 9962/60. Class 97 (1). [Also in Group XIX] A photo-elastic device for measuring principal stresses comprises a birefringent test-piece 7, a source of polarized light part of which is directed through a region of test-piece 7 along a path substantially normal to one of the principal stress directions and through an analyser, another part of the light being directed along a path substantially normal to the other of the principal stresses and through the analyser whereby two fringe patterns related to the principal stresses are simultaneously produced. As shown, Fig. 1, rays R o , R n from a source 2 pass through a polarizer 3, the ray R n being directed substantially normally with respect to a birefringent test-piece 7 and the ray R o being reflected from a mirror 10 and directed obliquely towards the test-piece 7. The rays are refracted and reflected from a mirror surface 8 and pass through a compensator 4 and an analyser 5 into a view-piece 6. Fringe patterns are produced by both the normal and oblique ray due to the phase difference between the Extraordinary ray and Ordinary ray caused by passing through test-piece 7. In another embodiment, Fig. 4, the rays pass through the test-piece 7. A transparent sheet 18 carrying a scale 19 may be attached to compensator 4 to enable one of the principal stresses to be determined directly. The other principal stress may be determined directly by rotating the apparatus through 90 degrees.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR790034A FR1227474A (en) | 1959-03-21 | 1959-03-21 | Method and photoelastimetric apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB919215A true GB919215A (en) | 1963-02-20 |
Family
ID=8712781
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB996260A Expired GB919215A (en) | 1959-03-21 | 1960-03-21 | Photoelastimetric method and apparatus |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE587328A (en) |
| CH (1) | CH385514A (en) |
| FR (1) | FR1227474A (en) |
| GB (1) | GB919215A (en) |
-
1959
- 1959-03-21 FR FR790034A patent/FR1227474A/en not_active Expired
-
1960
- 1960-02-05 BE BE587328A patent/BE587328A/en unknown
- 1960-03-19 CH CH309860A patent/CH385514A/en unknown
- 1960-03-21 GB GB996260A patent/GB919215A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR1227474A (en) | 1960-08-22 |
| CH385514A (en) | 1964-12-15 |
| BE587328A (en) | 1960-05-30 |
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