GB235225A - Process and apparatus for testing fatigue phenomena in materials - Google Patents
Process and apparatus for testing fatigue phenomena in materialsInfo
- Publication number
- GB235225A GB235225A GB14782/25A GB1478225A GB235225A GB 235225 A GB235225 A GB 235225A GB 14782/25 A GB14782/25 A GB 14782/25A GB 1478225 A GB1478225 A GB 1478225A GB 235225 A GB235225 A GB 235225A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bar
- current
- magnet
- act
- 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
- 239000000463 material Substances 0.000 title abstract 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 4
- 230000010355 oscillation Effects 0.000 abstract 3
- 229910052742 iron Inorganic materials 0.000 abstract 2
- 238000005452 bending Methods 0.000 abstract 1
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 238000013016 damping Methods 0.000 abstract 1
- 238000009661 fatigue test Methods 0.000 abstract 1
- 230000006698 induction Effects 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 229910052751 metal Inorganic materials 0.000 abstract 1
- 238000005192 partition Methods 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
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
-
- 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
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/023—Pressure
- G01N2203/0234—Low pressure; Vacuum
-
- 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
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/0617—Electrical or magnetic indicating, recording or sensing 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
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/0641—Indicating or recording means; Sensing means using optical, X-ray, ultraviolet, infrared or similar detectors
-
- 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
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
-
- 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
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0688—Time or frequency
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
235,225. International General Electric Co., Inc., (Assignees of Allgemeine Elektricitõts Ges.). June 7, 1924, [Convention date]. Testing physical qualities of materials. - In fatigue testing, alternating stresses are produced in the specimen by an electromagnet excited by an alternating current the source of which is the anode current of one or more thermionic valves. A valve a, Fig. 1 in combination with an oscillating circuit b and back coupling c is connected to a source of electric current with the interposition of a resistance or self induction coil d. Two amplifier valves f, h and intervalve transformers e, g are arranged in cascade connection to increase the small current fluctuations of the oscillation generator a, b, c so that they are sufficient to operate an electromagnet k which sets up bending vibration in a specimen bar m fixed at one end. The oscillations of the exciting circuit can be varied by varying the capacity and self-induction of the circuit b. The number of oscillations can be measured by a wave-measurer l loosely coupled to the oscillating circuit, or measured acoustically by a telephone By regulating the strength of current of the electromagnet and therefore the deflection of the bar, the stress on the latter may be varied. The bar if not of iron should have a piece of iron secured to it. The magnet may act on the end of the bar for tension tests, or two magnets may act on vanes projecting at right angles to the axis of the bar tor torsion tests. In Fig. 5, the test bar in is secured in a box s in which a vacuum can be produced, so as to eliminate damping by the surrounding medium. The magnet k may be mounted inside the box or may be outside and act through a thin metal partition. The deflection of the bar may be measured by a mirror and lens or by current induced in a magnet u. A holding wire r is provided by varying the tension of which the natural period of vibration of the test bar may be adjusted.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE235225X | 1924-06-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB235225A true GB235225A (en) | 1925-12-31 |
Family
ID=5895755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB14782/25A Expired GB235225A (en) | 1924-06-07 | 1925-06-06 | Process and apparatus for testing fatigue phenomena in materials |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB235225A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110108565A (en) * | 2019-06-05 | 2019-08-09 | 长春浩园试验机有限公司 | High frequency composite electron universal testing machine |
-
1925
- 1925-06-06 GB GB14782/25A patent/GB235225A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110108565A (en) * | 2019-06-05 | 2019-08-09 | 长春浩园试验机有限公司 | High frequency composite electron universal testing machine |
| CN110108565B (en) * | 2019-06-05 | 2024-02-09 | 长春浩园试验机有限公司 | High-frequency composite electronic universal testing machine |
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