CN203606221U - Three-point bending-loading straining testing experimental device - Google Patents
Three-point bending-loading straining testing experimental device Download PDFInfo
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- CN203606221U CN203606221U CN201320725265.9U CN201320725265U CN203606221U CN 203606221 U CN203606221 U CN 203606221U CN 201320725265 U CN201320725265 U CN 201320725265U CN 203606221 U CN203606221 U CN 203606221U
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- strain
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- point bending
- depression bar
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- 238000012360 testing method Methods 0.000 title claims abstract description 50
- 238000004519 manufacturing process Methods 0.000 claims abstract description 46
- 238000013001 point bending Methods 0.000 claims description 18
- 230000006835 compression Effects 0.000 abstract description 7
- 238000007906 compression Methods 0.000 abstract description 7
- 238000003825 pressing Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 238000009864 tensile test Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000012669 compression test Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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Abstract
The utility model relates to a three-point bending-loading straining testing experimental device, and belongs to the technical field of testing instruments. The three-point bending-loading straining testing experimental device is characterized by comprising a testing platform which is divided into a compression strain production area and a tensile strain production area; a pair of parallel movable cushion blocks (1) is arranged in the compression strain production area; pressing rods (2) parallel to the movable cushion blocks (1) are arranged between the movable cushion blocks (1); the movable cushion blocks (1) bear a rod to be tested, and the pressing rods press the rod to be tested; a plurality of bolt hole groups (3) are arranged at equal intervals in the tensile strain production area; each bolt hole group (3) can fix one of the pressing rods (2); the pair of parallel pressing rods (2) are fixed to the corresponding bolt holes (3); ejector rob screw holes (5) spirally matched with ejector robs (6) are formed between the pair of parallel pressing rods (2).
Description
Technical field
The utility model relates to a kind of three-point bending and loads strain testing experimental provision, belongs to testing tool technical field.
Background technology
Impression Strain Method is a kind of method of testing of novel unrelieved stress, and it is to utilize spherical indenter to be pressed into material surface, calculates unrelieved stress by measuring impression change in displacement situation around.While using the method, owing in advance the stress-strain relation of certain material being carried out to Experimental Calibration, so be pressed into the rear impression strain variation information of Hookean region around as long as pressure head is known in application strain, just can obtain the original unrelieved stress of component surface.
In impression Strain Method test unrelieved stress process, the relation between impression strain increment and elastic strain obtains by calibration experiment.When calibration experiment, need to apply elastic strain to demarcating test plate (panel).Existing loading procedure is mainly to carry out on one directional tensile test machine and Axial compression tests machine.When the position limitation of one way tensile test machine and Uniaxial Compression, the buckling problem of test specimen is that impression manufacture in experimentation has brought difficulty.Such equipment cost is higher simultaneously.
Summary of the invention
The utility model technical issues that need to address are: the one directional tensile test seat in the plane of existing measurement unrelieved stress is equipped with limitation, and the buckling problem of test specimen is that impression manufacture in experimentation has brought difficulty when Uniaxial Compression, such equipment cost is higher simultaneously.
The utility model is taked following technical scheme:
A kind of three-point bending loads strain testing experimental provision, comprises test platform, and described test platform is divided into compressive strain fabrication region and tensile strain fabrication region; In described compressive strain fabrication region, be provided with the movable cushion block 1 of pair of parallel, be provided with depression bar 2 in parallel between a pair of movable cushion block 1, movable cushion block 1 is carried rod member to be tested, and depression bar presses down rod member to be tested; In described tensile strain fabrication region, be provided with some groups of equidistant bolts hole 3, every group of bolt hole 3 can be fixed a depression bar 2, the depression bar 2 of pair of parallel is fixed on corresponding bolt hole 3, is provided with push rod screw 5 therebetween, and described push rod screw 5 coordinates with push rod 6 spirals.
In the time carrying out compressive strain manufacture, according to the length of rod member, adjust the position of left and right sides movable cushion block 1, and itself and test platform are fixed, rod member is shelved in movable cushion block 1, depression bar 2 is installed, make it contact and compress with rod member, working pressure machine carries out pressing action to depression bar 2, and the upper surface of rod member completes the manufacture of compressive strain;
In the time carrying out tensile strain manufacture, first rod member to be tested is placed in tensile strain fabrication region, according to the length of rod member, depression bar 2 is arranged on suitable bolt hole 3, and rod member is compressed, adopt the mode of bolt pressurization to be arranged on push rod screw 5 push rod 6, rotation push rod, until complete the manufacture of the tensile strain of rod member upper surface.
Further, described test platform is rectangular, and described compressive strain fabrication region and tensile strain fabrication region are parallel to each other.
Further, described movable cushion block 1 is slided along described test platform by guide rail.
Further, described push rod screw 5 is equidistant with the depression bar 2 of both sides.
Further, described depression bar 2 is identical with movable cushion block 1 length.
The beneficial effects of the utility model are:
1) avoided the buckling problem that uses one directional tensile test machine to bring to rod member.
2) equipment cost reduces greatly.
3) simple in structure, easy to use.
4) by compressive strain manufacture and tensile strain manufacturing integration on an experiment porch, configuration is rationally.
Accompanying drawing explanation
Fig. 1 is the schematic diagram while adopting unilateral stretching.
Fig. 2 is the schematic diagram while adopting Uniaxial Compression.
Fig. 3 adopts three-point bending to load the schematic diagram that compressive strain is manufactured.
Fig. 4 adopts three-point bending to load the schematic diagram that tensile strain is manufactured.
Fig. 5 is the front view that the utility model three-point bending loads strain testing experimental provision.
Fig. 6 is the left view that the utility model three-point bending loads strain testing experimental provision.
Fig. 7 is the vertical view that the utility model three-point bending loads strain testing experimental provision.
Fig. 8 is that certain metal material is demarcated matched curve.
In figure, 1. movable cushion block, 2. depression bar, 3. bolt hole, 4. test platform, 5. push rod screw, 6. push rod.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further illustrated.
Comparative example:
Referring to Fig. 1-2, unilateral stretching and Uniaxial Compression carry out in experimental machine.Test plate (panel) one end is fixed, applies a load that deviates from stiff end at the other end, realize and stretching, apply a load of pointing to stiff end and realize compression.
The embodiment of technical solutions of the utility model:
Referring to Fig. 3-4, three-point bending is that the load(ing) point between two strong points loads, and forms two moments and test plate (panel) is bent between 3.
Referring to Fig. 5-7, a kind of three-point bending loads strain testing experimental provision, comprises test platform, and described test platform is divided into compressive strain fabrication region and tensile strain fabrication region; In described compressive strain fabrication region, be provided with the movable cushion block 1 of pair of parallel, be provided with depression bar 2 in parallel between a pair of movable cushion block 1, movable cushion block 1 is carried rod member to be tested, and depression bar presses down rod member to be tested; In described tensile strain fabrication region, be provided with some groups of equidistant bolts hole 3, every group of bolt hole 3 can be fixed a depression bar 2, the depression bar 2 of pair of parallel is fixed on corresponding bolt hole 3, is provided with push rod screw 5 therebetween, and described push rod screw 5 coordinates with push rod 6 spirals.
Referring to Fig. 7, described test platform is rectangular, and described compressive strain fabrication region and tensile strain fabrication region are parallel to each other, and compressive strain manufacture and tensile strain manufacture are incorporated on a platform.
Referring to Fig. 7, described movable cushion block 1 is slided along described test platform by guide rail, is convenient to adjust according to the length of rod member to be tested.
Referring to Fig. 7, described push rod screw 5 is equidistant with the depression bar 2 of both sides, and the stress that rod member is subject to is average.
Referring to Fig. 7, described depression bar 2 is identical with movable cushion block 1 length.
In the time carrying out compressive strain manufacture, according to the length of rod member, adjust the position of left and right sides movable cushion block 1, and itself and test platform are fixed, rod member is shelved in movable cushion block 1, depression bar 2 is installed, make it contact and compress with rod member, working pressure machine carries out pressing action to depression bar 2, and the upper surface of rod member completes the manufacture of compressive strain;
In the time carrying out tensile strain manufacture, first rod member to be tested is placed in tensile strain fabrication region, according to the length of rod member, depression bar 2 is arranged on suitable bolt hole 3, and rod member is compressed, push rod 6 is arranged on push rod screw 5, and rotation push rod, until complete the manufacture of the tensile strain of rod member upper surface.
Below the present embodiment is further described below: as shown in Fig. 5-7, the three-point bending of the present embodiment loads strain testing test unit and is mainly divided into tensile strain fabrication region and compressive strain fabrication region.Whole charger is mainly made up of parts such as depression bar 2, movable cushion block 1, push rod screws 5.Wherein depression bar 2 is in tensile strain fabrication region, and what play is the effect of the strong point, and 5 of push rod screws play the effect of loading, have formed tensile strain like this at test plate (panel) upper surface.In compressive strain fabrication region, what depression bar 2 played is the effect of imposed load, and movable cushion block 1 plays the effect of the strong point, has so formed compressive strain at test plate (panel) upper surface.
In compressive strain fabrication region, movable cushion block 1 can move freely, and that is to say that the distance of two strong points is adjustable in the time loading manufacture compressive strain.So just increase calibration experiment scope, be applicable to the demarcation test plate (panel) of different size.In like manner, owing to demarcating the difference of test plate (panel) size, in tensile strain fabrication region, reserved four bolts hole 3, in the time running into small size demarcation test plate (panel), push rod 6 plays the effect of the strong point.
Lift specific embodiment:
Certain metal material is carried out to rating test, and demarcation sample dimensions is 500*55*16mm.Demarcate test plate (panel) surface and paste foil gauge, adopt three-point bending to apply elastic strain, then manufacture impression, gather strain increment.
According to the elastic strain value applying, and the impression strain increment gathering, take elastic strain as horizontal ordinate, strain increment is ordinate, as shown in Figure 8.And each data are carried out to matching according to relevant criterion, degree of fitting is higher, can carry out for this kind of material the calculating of impression Strain Method test residual stress measurement.
The utility model loads to replace unilateral stretching and Axial compression tests machine, at timing signal, test plate (panel) is applied to elastic strain by three-point bending.Easy and simple to handle, practical, reduce experimental cost.
Claims (5)
1. three-point bending loads a strain testing experimental provision, it is characterized in that:
Comprise test platform, described test platform is divided into compressive strain fabrication region and tensile strain fabrication region;
The movable cushion block (1) that is provided with pair of parallel in described compressive strain fabrication region, is provided with depression bar in parallel (2) between a pair of movable cushion block (1), movable cushion block (1) is carried rod member to be tested, and depression bar presses down rod member to be tested;
In described tensile strain fabrication region, be provided with some groups of equidistant bolts hole (3), every group of bolt hole (3) can be fixed a depression bar (2), the depression bar (2) of pair of parallel is fixed on corresponding bolt hole (3), be provided with push rod screw (5) therebetween, described push rod screw (5) coordinates with push rod (6) spiral.
2. three-point bending as claimed in claim 1 loads strain testing experimental provision, it is characterized in that: described test platform is rectangular, and described compressive strain fabrication region and tensile strain fabrication region are parallel to each other.
3. three-point bending as claimed in claim 1 loads strain testing experimental provision, it is characterized in that: described movable cushion block (1) is slided along described test platform by guide rail.
4. three-point bending as claimed in claim 1 loads strain testing experimental provision, it is characterized in that: described push rod screw (5) is equidistant with the depression bar (2) of both sides.
5. three-point bending as claimed in claim 1 loads strain testing experimental provision, it is characterized in that: described depression bar (2) is identical with movable cushion block (1) length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320725265.9U CN203606221U (en) | 2013-11-15 | 2013-11-15 | Three-point bending-loading straining testing experimental device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320725265.9U CN203606221U (en) | 2013-11-15 | 2013-11-15 | Three-point bending-loading straining testing experimental device |
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| Publication Number | Publication Date |
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| CN203606221U true CN203606221U (en) | 2014-05-21 |
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| CN201320725265.9U Expired - Lifetime CN203606221U (en) | 2013-11-15 | 2013-11-15 | Three-point bending-loading straining testing experimental device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105115712A (en) * | 2015-08-19 | 2015-12-02 | 中国航空工业集团公司西安飞机设计研究所 | Simply support boundary composite material frame pull-off test device and method |
| CN105136659A (en) * | 2015-08-19 | 2015-12-09 | 中国航空工业集团公司西安飞机设计研究所 | Clamped-boundary composite-material frame pull-off test apparatus and method |
| CN106289968A (en) * | 2015-06-23 | 2017-01-04 | 核工业北京地质研究院 | A kind of assay device for different sliding distance loading heads |
| CN107917773A (en) * | 2017-12-29 | 2018-04-17 | 爱德森（厦门）电子有限公司 | A kind of pipe stick material residual stress is without impression device for measurement of strain and method |
| CN108168748A (en) * | 2018-03-26 | 2018-06-15 | 桂林电子科技大学 | The plate displacement location auxiliary device that bending stress measures |
| CN111366456A (en) * | 2018-12-25 | 2020-07-03 | 泰州隆基乐叶光伏科技有限公司 | Method for testing mechanical load capacity of battery piece |
-
2013
- 2013-11-15 CN CN201320725265.9U patent/CN203606221U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106289968A (en) * | 2015-06-23 | 2017-01-04 | 核工业北京地质研究院 | A kind of assay device for different sliding distance loading heads |
| CN105115712A (en) * | 2015-08-19 | 2015-12-02 | 中国航空工业集团公司西安飞机设计研究所 | Simply support boundary composite material frame pull-off test device and method |
| CN105136659A (en) * | 2015-08-19 | 2015-12-09 | 中国航空工业集团公司西安飞机设计研究所 | Clamped-boundary composite-material frame pull-off test apparatus and method |
| CN107917773A (en) * | 2017-12-29 | 2018-04-17 | 爱德森（厦门）电子有限公司 | A kind of pipe stick material residual stress is without impression device for measurement of strain and method |
| CN108168748A (en) * | 2018-03-26 | 2018-06-15 | 桂林电子科技大学 | The plate displacement location auxiliary device that bending stress measures |
| CN108168748B (en) * | 2018-03-26 | 2023-11-07 | 桂林电子科技大学 | Plate displacement positioning auxiliary device for measuring bending stress |
| CN111366456A (en) * | 2018-12-25 | 2020-07-03 | 泰州隆基乐叶光伏科技有限公司 | Method for testing mechanical load capacity of battery piece |
| CN111366456B (en) * | 2018-12-25 | 2024-02-09 | 芜湖隆基光伏科技有限公司 | Method for testing mechanical load capacity of battery piece |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140521 |