GB903004A - Improvements in and relating to fatigue testing - Google Patents
Improvements in and relating to fatigue testingInfo
- Publication number
- GB903004A GB903004A GB1091459A GB1091459A GB903004A GB 903004 A GB903004 A GB 903004A GB 1091459 A GB1091459 A GB 1091459A GB 1091459 A GB1091459 A GB 1091459A GB 903004 A GB903004 A GB 903004A
- Authority
- GB
- United Kingdom
- Prior art keywords
- specimen
- carrier
- pick
- free end
- electromagnet
- 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
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
- G01N3/38—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by electromagnetic means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0023—Bending
Abstract
903,004. Fatigue testing. ELEKTROPODNIK H.L. MESTA PRAHY. March 31, 1959 [April 9, 1958], No. 10914/59. Classes 106 (2) and 106 (4). The test specimen, e.g. a turbine blade 1, is clamped to the free end 41 of an elongated carrier 4 rigidly fixed at its other end 42 to a base 5, and a driving electromagnet 6, disposed adjacent the free end 41, is energized by an alternating current controlled by a pick-up 8 carried at the free end of the carrier 4 and engageable with the test specimen at a point spaced from the clamping means 2 to generate a control voltage corresponding to the amplitude of movement of the specimen. The control voltage is fed into the energizing circuit (not shown) of the electromagnet through an amplifier 9 and a phase shifter. The electromagnet 6 induces vibrations of the specimen of such magnitude that the pick-up 8 transmits signals which after amplification at 9 are used to further vibrate the specimen to maintain the resonant frequency and compensate for external influences such as temperature and fatigue of the material of the carrier 4. If the carrier is of non-magnetic material an insert 7 of iron is provided. The pick-up 8 also measures the amplitude and frequency of the vibrations.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS188158 | 1958-04-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB903004A true GB903004A (en) | 1962-08-09 |
Family
ID=5354288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1091459A Expired GB903004A (en) | 1958-04-09 | 1959-03-31 | Improvements in and relating to fatigue testing |
Country Status (2)
| Country | Link |
|---|---|
| BE (1) | BE577249A (en) |
| GB (1) | GB903004A (en) |
-
1959
- 1959-03-31 GB GB1091459A patent/GB903004A/en not_active Expired
- 1959-03-31 BE BE577249A patent/BE577249A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| BE577249A (en) | 1959-07-16 |
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