GB771932A - Method of and apparatus for indicating the plastic deformation of materials - Google Patents
Method of and apparatus for indicating the plastic deformation of materialsInfo
- Publication number
- GB771932A GB771932A GB28405/54A GB2840554A GB771932A GB 771932 A GB771932 A GB 771932A GB 28405/54 A GB28405/54 A GB 28405/54A GB 2840554 A GB2840554 A GB 2840554A GB 771932 A GB771932 A GB 771932A
- Authority
- GB
- United Kingdom
- Prior art keywords
- load
- test length
- strain
- meter
- plastic deformation
- 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
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
771,932. Measuring plastic deformation electrically. COMMONWEALTH OF AUSTRALIA. Oct. 1, 1954 [Oct. 6, 1953], No. 28405/54. Class 40 (1). [Also in Group XIX] An apparatus for indicating the extent of plastic deformation of a material under a given load comprises means for applying a load to a test length thereof, and an equal or proportional load to a comparison member which remains within its elastic limit under such a load, resistance strain gauges responsive to the strain in the test length and comparison member respectively connected in a bridge circuit which is adjustable to remain balanced only so long as the strain in the test length is proportional to load, and a bridge instrument which thus gives a reading proportional to any plastic deformation thereof. In Fig. 1 the comparison member 11 is a shackle through which load is applied to test length 13, its strain gauges E2, E3 being mounted directly thereon while the gauges E, E1 responsive to strain of the length 13 are mounted on the highly stressed strap 16 of an extensometer 15 fixed thereto. Alternatively, the comparison member is of modified construction with its gauges similarly mounted on an extensometer. The member may in this case form an integral extension of the test length with a cross-section sufficient to keep it within its elastic limit. The bridge circuit (Fig. 5) is initially balanced by varying resistor A and the shorting bar across resistors B is then adjusted to a position in which the bridge remains balanced for small changes in load. The bridge becomes unbalanced when the test length is plastically deformed, the meter being directly calibrated to show the extent thereof. A meter responsive to load is read when a meter reading corresponding to a predetermined percentage deformation occurs. The meter may be a mirror galvanometer and may actuate a photocell in response to a certain unbalance current or may be replaced by an electronic relay triggered by such a current to operate a buzzer and/or signal light.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU771932X | 1953-10-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB771932A true GB771932A (en) | 1957-04-10 |
Family
ID=3757799
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB28405/54A Expired GB771932A (en) | 1953-10-06 | 1954-10-01 | Method of and apparatus for indicating the plastic deformation of materials |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB771932A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2143044A (en) * | 1983-06-28 | 1985-01-30 | Heldenbrand W C | Pipe testing apparatus |
| GB2165362A (en) * | 1984-07-12 | 1986-04-09 | Sandvik Hard Materials Ab | Method and device for measuring small forces and small movements in a materials testing machine or other loading device |
| CN112380690A (en) * | 2020-11-11 | 2021-02-19 | 安徽工业大学 | Construction method of metastable multiphase metal material rheological stress model |
| CN114963965A (en) * | 2022-08-01 | 2022-08-30 | 江铃汽车股份有限公司 | Detection method for elastic-plastic deformation of metal part |
-
1954
- 1954-10-01 GB GB28405/54A patent/GB771932A/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2143044A (en) * | 1983-06-28 | 1985-01-30 | Heldenbrand W C | Pipe testing apparatus |
| GB2165362A (en) * | 1984-07-12 | 1986-04-09 | Sandvik Hard Materials Ab | Method and device for measuring small forces and small movements in a materials testing machine or other loading device |
| CN112380690A (en) * | 2020-11-11 | 2021-02-19 | 安徽工业大学 | Construction method of metastable multiphase metal material rheological stress model |
| CN112380690B (en) * | 2020-11-11 | 2022-07-26 | 安徽工业大学 | Construction method of metastable complex phase metal material rheological stress model |
| CN114963965A (en) * | 2022-08-01 | 2022-08-30 | 江铃汽车股份有限公司 | Detection method for elastic-plastic deformation of metal part |
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