DE708614C - Method for determining the mechanical stress prevailing below the yield point in a magnetizable body under constant static load - Google Patents
Method for determining the mechanical stress prevailing below the yield point in a magnetizable body under constant static loadInfo
- Publication number
- DE708614C DE708614C DEC54031D DEC0054031D DE708614C DE 708614 C DE708614 C DE 708614C DE C54031 D DEC54031 D DE C54031D DE C0054031 D DEC0054031 D DE C0054031D DE 708614 C DE708614 C DE 708614C
- Authority
- DE
- Germany
- Prior art keywords
- static load
- determining
- yield point
- under constant
- mechanical stress
- 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
- 230000003068 static effect Effects 0.000 title claims description 8
- 238000000034 method Methods 0.000 title claims description 6
- 230000005291 magnetic effect Effects 0.000 claims description 4
- 230000005389 magnetism Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 239000003302 ferromagnetic material Substances 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002907 paramagnetic material Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0041—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0091—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by using electromagnetic excitation or detection
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
- Measuring Magnetic Variables (AREA)
Description
Verfahren zum Ermitteln der in einem unter gleichbleibender statischer Belastung stehenden magnetisierbaren Körper unterhalb der Streckgrenze herrschenden mechanischen Spannung Es ist bekannt, elektromagnetische Spannungsmessungen an Bauteilen in der Weise vorzunehmen, daß der Prüfling mittels einer besonderen Stromquelle magnetisiert und einer Belastung unterworfen wird. Dieses Verfahren eignet sich jedoch nur für die Spannungsermittlung von Körpern bestimmter und einfacher Form. Zur - Spannungsermittlung von ganzen Bauteilen ist es wegen der notwendigen Magnetisierung nicht anwendbar. Durch das erfindungsgemäße Ver: fahren wird dieser Nachteil vermieden.Method of determining the in one under constant static Load standing magnetizable body prevailing below the yield point mechanical stress It is known to carry out electromagnetic stress measurements on components make in such a way that the test object by means of a special power source magnetized and subjected to a load. This method is suitable but only for the determination of stresses of bodies of a certain and simple shape. For - stress determination of entire components it is because of the necessary magnetization not applicable. This disadvantage is avoided by the method according to the invention.
Bekanntlich findet sich in ferro- und paramagnetischen Werkstoffen ein remanenter Magnetismus vor, herrührend von einer vorausgegangenen Behandlung mechanischer oder magnetischer (Erdmagnetismus) Art. Wird dann dieser Werkstoff einer ruhenden Belastung unterhalb der Streckgrenze ausgesetzt, so stellt sich die Größe des durch diese Belastung hervorgerufenen magnetisehen Feldes entsprechend der gewählten statischen Belastung ein, wie sich durch Versuche nachweisen läßt. It is known that it is found in ferromagnetic and paramagnetic materials a remanent magnetism, resulting from a previous treatment mechanical or magnetic (terrestrial magnetism) kind. Then this material exposed to a static load below the yield point, the Corresponding to the size of the magnetic field caused by this load the selected static load, as can be proven by tests.
Werden nun die Kraftlinien dieses stehenden Feldes durch eine sich drehende Spule geschnitten, so kann die Größe des Feldes durch den in der Spule induzierten Strom nachgewiesen werden. Auf dieser Erkenntnis beruht das erfindungsgemäße Verfahren zum Ermitteln der in einem unter gleichbleibender statischer Belastung stehenden magnetisierbaren Körper unterhalb der Streckgrenze herrschenden mechanischen Spannung. Now the lines of force of this standing field become through one rotating coil cut, the size of the field can be adjusted by the inside of the coil induced current can be detected. The inventive concept is based on this knowledge Method for determining the in one under constant static load standing magnetizable body below the yield point prevailing mechanical Tension.
Die Erfindung besteht darin, daß die Größe des nur durch die statische Belastung im zu untersuchenden Körper hervorgerufenen magenetischen Feldes über eine sich drehende Meßspule zur Anzeige gebracht und aus dieser auf die durch diese Belastung hervorgerufene jeweilige im zu untersuchenden Körper herrschende mechanische Spannung geschlossen wird. The invention consists in that the size of the only by the static Stress in the body to be examined induced magnetic field a rotating measuring coil brought to the display and from this to the through this Mechanical stress caused in the body to be examined Voltage is closed.
Durch die vorliegende Erfindung wird der Konstrukteur in die Lage versetzt, sich in einfacher Weise über die in einem Werkstoff bestehenden Spannungen Kenntnis zu verschaffen, und zwar ohne Zuhilfenahme einer fremden Stromquelle und ohne Zerstörung des Bauteils, sondern lediglich durch Ansetzen einer Drehspule an den zu untersuchenden, unter einer gleichbleibenden Belastung stehenden Bauteil mit den nötigen Meßgeräten. The present invention enables the designer offset, in a simple manner on the existing stresses in a material To provide knowledge, without the aid of an external power source and without destroying the component, just by attaching a moving coil the component to be examined under a constant load with the necessary measuring devices.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEC54031D DE708614C (en) | 1936-07-02 | 1936-07-02 | Method for determining the mechanical stress prevailing below the yield point in a magnetizable body under constant static load |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEC54031D DE708614C (en) | 1936-07-02 | 1936-07-02 | Method for determining the mechanical stress prevailing below the yield point in a magnetizable body under constant static load |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE708614C true DE708614C (en) | 1941-07-25 |
Family
ID=7027885
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEC54031D Expired DE708614C (en) | 1936-07-02 | 1936-07-02 | Method for determining the mechanical stress prevailing below the yield point in a magnetizable body under constant static load |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE708614C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1201582B (en) * | 1953-04-18 | 1965-09-23 | Asea Ab | Method for displaying or measuring mechanical stresses in a body made of magnetostrictive material |
-
1936
- 1936-07-02 DE DEC54031D patent/DE708614C/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1201582B (en) * | 1953-04-18 | 1965-09-23 | Asea Ab | Method for displaying or measuring mechanical stresses in a body made of magnetostrictive material |
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