CN208921575U - A kind of testing fatigue batten of pultrusion plate - Google Patents
A kind of testing fatigue batten of pultrusion plate Download PDFInfo
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- CN208921575U CN208921575U CN201821129727.XU CN201821129727U CN208921575U CN 208921575 U CN208921575 U CN 208921575U CN 201821129727 U CN201821129727 U CN 201821129727U CN 208921575 U CN208921575 U CN 208921575U
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Abstract
The utility model belongs to material properties test field, more particularly to a kind of testing fatigue batten of pultrusion plate, including tested layer, the first bidirectional fabric enhancement layer and the second bidirectional fabric enhancement layer, the notch that the channel-shaped of oriented middle part arc-shaped recess is all provided in the upper and lower side of test bars and the plane at left and right sides of notch, the deepest part of notch is the upper and lower side of tested layer, and the left and right sides of testing fatigue batten are identical with the shape of upper and lower two sides.The beneficial effects of the utility model are: the thickness precision machining of test bars, it is ensured that test is normally carried out；First bidirectional fabric enhancement layer and the second bidirectional fabric enhancement layer are flexible high, have booster action to tested layer, are able to bear continually changing fatigue and cyclic load, clamp convenient for test machine；Four sides be in the notch of the channel-shaped of middle part arc-shaped recess, good toughness, be not likely to produce stress concentration, be not easy embrittlement, can effective guarantee batten testing time.
Description
Technical field
The utility model belongs to composite property testing field, and in particular to a kind of testing fatigue sample of pultrusion plate
Item.
Background technique
Previous fabric batten is the product after fabric resin pickup, thus it is possible to vary fabric layers change the thickness of template,
Then cutting can be obtained by batten, and loading apparatus treats test bars by fixture and carries out cyclic fatigue load test.Pultrusion
Plate (carbon fiber or glass) molding mode determine that thickness is limited by mold, such as, it is desirable that the thickness at the both ends of test bars
It is required that be 7mm, and plate thickness is fixed, 7mm made from reality is unable to satisfy the testing requirement of 7mm.For the upper deviation
Plate, polishing processing it is very difficult, difficulty of processing is big；For the plate of lower deviation, then ideal batten can not be obtained.Two
The thickness at end is smaller, and axial force is bigger, is about easy to appear underproof failure by shear；Such as the pultrusion plate of most mainstream with a thickness of
5mm axial force is too big, and existing test batten design and equipment are all unable to complete this experiment.In addition, the clamping at batten both ends
Plane is very big by chucking power, and clamping plane is also easy to produce stress concentration, embrittlement is easy, thus when the test of batten cannot be effectively ensured
Between.
Summary of the invention
The purpose of the utility model is to overcome defects of the existing technology, provide a kind of thickness processing essence of test bars
Really, it is ensured that test is normally carried out；Four sides are in the notch of the channel-shaped of middle part arc-shaped recess, and good toughness is not easy to produce
Raw stress is concentrated, and embrittlement is not easy, can effective guarantee batten testing time pultrusion plate testing fatigue batten.
The technical scheme adopted by the utility model to solve the technical problem is as follows: a kind of testing fatigue sample of pultrusion plate
Item comprising tested layer, the first bidirectional fabric enhancement layer being compounded on tested layer or more two sides respectively and second pair
To fabric reinforcement layer, it is all provided with the notch of the channel-shaped of oriented middle part arc-shaped recess in the upper and lower side of test bars and is located at a notch left side
The plane of right two sides, the deepest part of notch are the upper and lower side of tested layer, left and right sides of testing fatigue batten and upper
The shape of lower two sides is identical.
When making test bars, tested laminate material is first cut into thin (for example becoming 2mm), is subsequently sandwiched in the first bidirectional fabric
In enhancement layer and the second bidirectional fabric enhancement layer, form (adjustment integral thickness is design thickness, such as 7mm), then cut
Machining gap then reprocesses the left and right sides of testing fatigue batten, ultimately forms the batten of ideal form.Test bars
Thickness precision machining, it is ensured that test is normally carried out.First bidirectional fabric enhancement layer and the second bidirectional fabric enhancement layer are flexible
Height has booster action to tested layer, is able to bear continually changing fatigue and cyclic load, clamps convenient for test machine.Four
A side is in be not likely to produce stress concentration to the notch of the channel-shaped of middle part arc-shaped recess, good toughness, be not easy embrittlement, can be effective
Ensure the testing time of batten.
In experiment loading procedure, test a machine the plane clamped in the upper and lower side of test bars by fixture, and surveys
Testing bar applies stretching or compressing force, tests fatigue load.
During loading, the axial force of test bars: F0=L2*L1* σ 0,
The shearing force of test bars: Fs=Ss* τ=L3*L2* τ * 2+L3*L1* τ * 2,
Wherein,
Fs>1.5*F0
L1 is variable, can be designed according to testing requirement,
L2 is recommended as 10mm, 15mm, 20mm, 25mm,
L3 can be designed according to L1,50*L1 < L3 < 150*L1,
L5=a*L1；A=2~5 (L5 is thickness),
L4=b*L2；B=1.5~3.
Preferably, the most thin space L of two cambered surfaces2For 10~25mm, L2It is recommended as 10mm, 15mm, 20mm, 25mm, it is compound
Static test standard.
Specifically, the first bidirectional fabric enhancement layer and the second bidirectional fabric enhancement layer are ± 45 ° of knitted fabrics, and flexibility is more
Height has booster action to tested layer, clamps convenient for test machine.
In addition, test bars further include two grip blocks, test bars are held between two grip blocks, two clampings
Plate is bolted, and bolt is relatively arranged on the left and right sides of test bars.After two grip block clamping test battens, have
Better anti-flexing effect.
Further, resilient protection block is fixed with by screw on the opposite side of two grip blocks, test bars are set
Between two resilient protection blocks.Two resilient protection blocks can be bonded notch well, and fixed and friction is small.
A kind of beneficial effect of the testing fatigue batten of pultrusion plate of the utility model is:
1. the thickness precision machining of test bars, it is ensured that test is normally carried out；First bidirectional fabric enhancement layer and
Two bidirectional fabric enhancement layers are flexible high, have booster action to tested layer, are able to bear continually changing fatigue and cyclic load,
Convenient for test machine clamping.
2. four sides are in be not likely to produce stress concentration to the notch of the channel-shaped of middle part arc-shaped recess, good toughness, be not easy
Embrittlement, can effective guarantee batten testing time.
3. the first bidirectional fabric enhancement layer and the second bidirectional fabric enhancement layer are ± 45 ° of knitted fabrics, flexible higher, right
Tested layer has booster action, clamps convenient for test machine.
4. after two grip block clamping test battens, there is better anti-flexing effect.
5. two resilient protection blocks can be bonded notch well, fixed and friction is small.
Detailed description of the invention
Utility model will be further described in detail below with reference to the attached drawings and specific embodiments.
Fig. 1 is a kind of main view of the embodiment one of the testing fatigue batten of pultrusion plate of the utility model；
Fig. 2 is a kind of full sectional view of the embodiment one of the testing fatigue batten of pultrusion plate of the utility model；
Fig. 3 is a kind of tomograph of the embodiment one of the testing fatigue batten of pultrusion plate of the utility model；
Fig. 4 is a kind of full sectional view of the embodiment two of the testing fatigue batten of pultrusion plate of the utility model.
Wherein: 1. tested layers；2. the first bidirectional fabric enhancement layer；3. the second bidirectional fabric enhancement layer；5. notch；6. flat
Face；8. grip block；10. resilient protection block.
Specific embodiment
The utility model is described in further detail presently in connection with attached drawing.These attached drawings are simplified schematic diagram,
Only illustrate the basic structure of the utility model in a schematic way, therefore it only shows composition related with the utility model.
Embodiment one:
A kind of embodiment one of the testing fatigue batten of pultrusion plate of the utility model as shown in FIG. 1 to FIG. 3, packet
Include tested layer 1, the first bidirectional fabric enhancement layer 2 for being compounded on tested about 1 two sides of layer respectively and second two-way is knitted
Object enhancement layer 3 is all provided with the notch 5 of the channel-shaped of oriented middle part arc-shaped recess in the upper and lower side of test bars and to be located at notch 5 left
The plane 6 of right two sides, the deepest part of notch 5 are the upper and lower side of tested layer 1, the left and right sides of testing fatigue batten and
The shape of upper and lower two sides is identical.
When making test bars, tested 1 plate of layer is first cut into thin (for example becoming 2mm), first is subsequently sandwiched in and two-way knits
In object enhancement layer 2 and the second bidirectional fabric enhancement layer 3, form (adjustment integral thickness is design thickness, such as 7mm), then
Machining notch 5 then reprocesses the left and right sides of testing fatigue batten, ultimately forms the batten of ideal form.Test
The thickness precision machining of batten, it is ensured that test is normally carried out.First bidirectional fabric enhancement layer 2 and the second bidirectional fabric are reinforced
Layer 3 is flexible high, has booster action to tested layer 1, is able to bear continually changing fatigue and cyclic load, is convenient for test machine
Clamping.Four sides are in be not likely to produce stress concentration to the notch 5 of the channel-shaped of middle part arc-shaped recess, good toughness, not easy to brittle
Split, can effective guarantee batten testing time.
In experiment loading procedure, test a machine the plane 6 clamped in the upper and lower side of test bars by fixture, and surveys
Testing bar applies stretching or compressing force, tests fatigue load.
During loading, the axial force of test bars: F0=L2*L1* σ 0
The shearing force of test bars: Fs=Ss* τ=L3*L2* τ * 2+L3*L1* τ * 2
Wherein,
Fs>1.5*F0
L1 is variable, can be designed according to testing requirement,
L2 is recommended as 10mm, 15mm, 20mm, 25mm,
L3 can be designed according to L1,50*L1 < L3 < 150*L1
L5=a*L1；A=2~5 (L5 is thickness)
L4=b*L2；B=1.5~3.
Preferably, the most thin space L of two cambered surfaces2For 10~25mm, L2It is recommended as 10mm, 15mm, 20mm, 25mm, it is compound
Static test standard.
Specifically, the first bidirectional fabric enhancement layer 2 and the second bidirectional fabric enhancement layer 3 are ± 45 ° of knitted fabrics, flexible
It is higher, there is booster action to tested layer 1, clamped convenient for test machine.
Embodiment two:
A kind of embodiment two of the testing fatigue batten of pultrusion plate of the utility model as shown in Figure 4, the present embodiment
Difference with embodiment one is, test bars further include two grip blocks 8, test bars be held in two grip blocks 8 it
Between, two grip blocks 8 are bolted, and bolt is relatively arranged on the left and right sides of test bars.Two clampings of grip block 8 are surveyed
After testing bar, there is better anti-flexing effect.
Further, resilient protection block 10, test bars are fixed with by screw on the opposite side of two grip blocks 8
Between two resilient protection blocks 10.Two resilient protection blocks 10 can be bonded notch 5, fixed and friction well
It is small.In addition to this, other structures are the same as embodiment one for the present embodiment.
It should be appreciated that specific embodiment described above is only used for explaining the utility model, it is not used to limit this reality
With novel.By the utility model the obvious changes or variations extended out of spirit still in the utility model protection
Among range.
Claims (3)
1. a kind of testing fatigue batten of pultrusion plate, it is characterised in that: including tested layer (1), respectively be compounded in it is tested
Layer (1) the first bidirectional fabric enhancement layer (2) and the second bidirectional fabric enhancement layer (3) on two sides up and down, the test bars
Upper and lower side on be all provided with oriented middle part arc-shaped recess channel-shaped notch (5) and be located at notch (5) at left and right sides of plane
(6), the deepest part of the notch (5) is the upper and lower side of tested layer (1), the left and right sides of the testing fatigue batten
It is identical with the shape of upper and lower two sides；
The test bars further include two grip blocks (8), and the test bars are held between two grip blocks (8), and two
A grip block (8) is bolted, and the bolt is relatively arranged on the left and right sides of test bars；
Two grip blocks (8) are fixed with resilient protection block (10) by screw on opposite side, and the test bars are set to
Between two resilient protection blocks (10).
2. a kind of testing fatigue batten of pultrusion plate according to claim 1, it is characterised in that: two cambered surfaces (4)
Most thin space L2For 10~25mm.
3. a kind of testing fatigue batten of pultrusion plate according to claim 1, it is characterised in that: described first two-way knits
Object enhancement layer (2) and the second bidirectional fabric enhancement layer (3) are ± 45 ° of knitted fabrics.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821129727.XU CN208921575U (en) | 2018-07-17 | 2018-07-17 | A kind of testing fatigue batten of pultrusion plate |
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| CN201821129727.XU CN208921575U (en) | 2018-07-17 | 2018-07-17 | A kind of testing fatigue batten of pultrusion plate |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110887726A (en) * | 2019-10-28 | 2020-03-17 | 上海艾柯检测科技有限公司 | Polishing-free fatigue sample strip and fatigue testing method thereof |
| CN111572053A (en) * | 2020-05-29 | 2020-08-25 | 常州达姆斯检测技术有限公司 | Processing method of composite material test sample strip |
| CN112666020A (en) * | 2020-11-10 | 2021-04-16 | 明阳智慧能源集团股份公司 | Stress concentration verification test method for chamfering of wind power blade pultrusion plate |
-
2018
- 2018-07-17 CN CN201821129727.XU patent/CN208921575U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110887726A (en) * | 2019-10-28 | 2020-03-17 | 上海艾柯检测科技有限公司 | Polishing-free fatigue sample strip and fatigue testing method thereof |
| CN111572053A (en) * | 2020-05-29 | 2020-08-25 | 常州达姆斯检测技术有限公司 | Processing method of composite material test sample strip |
| CN111572053B (en) * | 2020-05-29 | 2021-12-14 | 常州达姆斯检测技术有限公司 | Processing method of composite material test sample strip |
| CN112666020A (en) * | 2020-11-10 | 2021-04-16 | 明阳智慧能源集团股份公司 | Stress concentration verification test method for chamfering of wind power blade pultrusion plate |
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