CN209513419U - A kind of three-point bending shearing field beam fatigue test clamper - Google Patents
A kind of three-point bending shearing field beam fatigue test clamper Download PDFInfo
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- CN209513419U CN209513419U CN201822021543.8U CN201822021543U CN209513419U CN 209513419 U CN209513419 U CN 209513419U CN 201822021543 U CN201822021543 U CN 201822021543U CN 209513419 U CN209513419 U CN 209513419U
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- crossbeam
- circular shaft
- end plate
- fatigue test
- seaming chuck
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Abstract
The utility model category aircraft fatigue strength test field is related to a kind of three-point bending shearing field beam fatigue test clamper.The fixture is made of crossbeam (1), end plate (2), seaming chuck circular shaft (3) and low bottom-disc circular shaft (4)；Wherein, crossbeam (1) both ends are bolted with end plate (2), and low bottom-disc circular shaft (4) is bolted with crossbeam (1) bottom, and seaming chuck circular shaft (3) is for testing load；The crossbeam (1) uses big rigidity Design mode, and postive stop baffle is set among crossbeam, postive stop baffle is arranged in the newel post both ends of end plate (2), postive stop baffle is arranged in seaming chuck circular shaft (3) both ends, crossbeam (1) the upper surface both ends are provided with support pressure head, using the utility model proposes fixture, it avoids testpieces and excessive out-of-plane bending and whole slide occurs, the examination of guarantee test part is true, the purpose for reducing empirical risk simultaneously, avoids unnecessary human and material resources resources loss.
Description
Technical field
The utility model category aircraft fatigue strength test field is related to a kind of three-point bending shearing field beam fatigue test folder
Tool.
Background technique
In aeroplane structure design, need to carry out experimental design for fuselage skin shear fatigue problem.It is curved about 3 points
Song shearing field beam fatigue test clamper design problem, wherein key core is 2 points: the 1. suitable postive stop baffles of design, solves to cut
Cut a beam test part out-of-plane bending and overall movement problem；2. reasonable load(ing) point and support press capitiform formula, guarantee at load(ing) point
No biggish stress is concentrated.
Existing fixture designing technique frequently can lead to testpieces and occur at out-of-plane bending, overall movement and load(ing) point
Stress concentrates excessively serious problem, and fatigue rupture easily occurs in advance in non-examination section, finally makes test lose meaning, makes
At the loss on man power and material.Therefore, a three-point bending shearing field beam fatigue test clamper how is designed, avoids trying
The excessive out-of-plane bending displacement of part is tested, mitigates the friction between fixture and testpieces, realizes that load transmission is uniform, is to solve this to ask
The key point of topic.What is designed in this way reaches reduction empirical risk, reduces the purpose of experimentation cost.
Utility model content
Purpose of utility model: a kind of three-point bending shearing field beam fatigue test clamper is designed, to avoid the excessive face of testpieces
Outside sweep displacement, mitigates the friction between fixture and testpieces, realizes that load transmission is uniform,
Technical solution: the utility model provides a kind of three-point bending shearing field beam fatigue test clamper, by crossbeam (1),
End plate (2), seaming chuck circular shaft (3) and low bottom-disc circular shaft (4) composition, crossbeam (1) both ends are bolted with end plate (2), under
Chassis circular shaft (4) is bolted with crossbeam (1) bottom, and seaming chuck circular shaft (3) is for testing load；It is characterized by:
The crossbeam (1) uses big rigidity Design mode, and postive stop baffle is arranged among crossbeam, and the two of end plate (2)
Hold inner side setting postive stop baffle, seaming chuck circular shaft (3) both ends are arranged postive stop baffle, crossbeam (1) the upper surface both ends with
End plate (2) junction is provided with support pressure head, supports support point of the pressure head as testpieces.The fixture avoids testpieces appearance
Excessive out-of-plane bending and whole slide, the examination of guarantee test part is true, while reducing the purpose of empirical risk, and it is unnecessary to avoid
Human and material resources resources loss.
Further, there is a strata tetrafluoroethene backing plate on all postive stop baffle surfaces, can mitigate fixture and testpieces it
Between friction.
Further, seaming chuck circular shaft (3) and low bottom-disc circular shaft (4) with one heart, guarantee that examination section is crossed at load load center
Centroid.
Further, seaming chuck circular shaft (3) is supported pressure head using cylindrical pressure head, is guaranteed using cylindrical pressure head
It is concentrated at load(ing) point without biggish stress, Crack prevention germinates from this, guarantees that fatigue test destroys in examination area.
Further, support pressure head that can be translated on crossbeam according to testpieces size.
Further, the upper end of end plate (2) is provided with newel post (2a), to enhance the intensity of end plate.
Advantageous effects: it avoids testpieces and excessive out-of-plane bending and whole slide occurs, the examination of guarantee test part is true
It is real, while the purpose of empirical risk is reduced, avoid unnecessary human and material resources resources loss.
Detailed description of the invention
Fig. 1 is the utility model fixture main view；
Fig. 2 is the specific implementation schematic diagram of the utility model；
Fig. 3 is the utility model fixture load schematic diagram；
Number explanation: 1 crossbeam, 2 newel posts and end plate, 3 seaming chuck circular shafts, 4 low bottom-disc circular shafts, 5 fixtures, 6 testpieces, 2a-
Newel post.
Specific embodiment
In order to illustrate more clearly of the technical solution in the utility model embodiment technology, with reference to the accompanying drawings and examples
To the further details of explanation of the utility model.
Referring to attached drawing 1-3, the utility model provides a kind of three-point bending shearing field beam fatigue test clamper, including crossbeam
(1), end plate (2), seaming chuck circular shaft (3) and low bottom-disc circular shaft (4), and be connected with testpieces, which is characterized in that the crossbeam
(1) big rigidity Design mode is used, and postive stop baffle is set among crossbeam, end plate (2) is arranged in four direction all around
Postive stop baffle is arranged in postive stop baffle, seaming chuck circular shaft (3) middle position.It avoids testpieces and excessive out-of-plane bending and entirety occurs
Sliding, the examination of guarantee test part is true, while reducing the purpose of empirical risk, avoids unnecessary human and material resources resource damage
It loses.
On the basis of above-mentioned fixture, all postive stop baffle surfaces are provided with a strata tetrafluoroethene backing plate, can mitigate
Friction between fixture and testpieces.
On the basis of above-mentioned fixture, seaming chuck circular shaft (3) and low bottom-disc circular shaft (4) with one heart, guarantee that load loads center
Cross examination section centroid.
On the basis of above-mentioned fixture, load(ing) point and two support point using a cylindrical pressure heads, guarantee at load(ing) point without
Biggish stress is concentrated, and Crack prevention germinates from this, guarantees that fatigue test destroys in examination area.
By taking certain aircraft three-point bending shears field beam fatigue test clamper as an example:
It is illustrated in figure 3 the schematic diagram of test implementation, including fixture 5, testpieces 6.If set according to existing fixture
Meter technology frequently can lead to testpieces and occur that out-of-plane bending, stress concentrates excessively serious ask at overall movement and load(ing) point
Topic, test result is insincere, and unnecessary human and material resources is caused to lose.It is being tested according to fixture designed by the utility model
The both ends of part lower edge and intermediate and upper limb both ends and first-class six positions of intermediate pressure are adopted limit and are prevented outside test specimen face with baffle
Bending, and all baffle surfaces have a strata tetrafluoroethene backing plate, for mitigating the friction between test specimen, guarantee test part
Load authenticity.In test testing experiment part tow sides strain symmetric case, and match with Finite element analysis results, try
It is credible to test real result, it was demonstrated that the feasibility of the utility model.
It should be noted that although several preferred embodiments of the present invention have shown and described in above description, such as
It is preceding described, it should be understood that the utility model is not limited to forms disclosed herein, and is not to be taken as to other embodiments
It excludes, and can be used for other combinations, modifications, and environments, and can pass through within the scope of the inventive concept described herein
The above teachings or related fields of technology or knowledge are modified.And changes and modifications made by those skilled in the art do not depart from this
The spirit and scope of utility model, then all should be in the protection scope of the appended claims for the utility model.
Claims (6)
1. a kind of three-point bending shears field beam fatigue test clamper, by crossbeam (1), end plate (2), seaming chuck circular shaft (3) and bottom
Disk circular shaft (4) composition, crossbeam (1) both ends are bolted with end plate (2), and low bottom-disc circular shaft (4) passes through with crossbeam (1) bottom
It is bolted, seaming chuck circular shaft (3) is for testing load；It is characterized by:
The crossbeam (1) uses big rigidity Design mode, and postive stop baffle is arranged among crossbeam, and the both ends of end plate (2) are leaned on
Postive stop baffle is arranged in interior side, and postive stop baffle, crossbeam (1) the upper surface both ends and end plate is arranged in seaming chuck circular shaft (3) both ends
(2) junction is provided with support pressure head, is used to support testpieces.
2. a kind of three-point bending according to claim 1 shears field beam fatigue test clamper, it is characterised in that: all limits
Baffle surface has a strata tetrafluoroethene backing plate.
3. a kind of three-point bending according to claim 1 shears field beam fatigue test clamper, it is characterised in that: seaming chuck circle
Axis (3) and low bottom-disc circular shaft (4) are concentric.
4. a kind of three-point bending according to claim 1 shears field beam fatigue test clamper, it is characterised in that: its feature is also
It is, seaming chuck circular shaft (3) supports pressure head using cylindrical pressure head using cylindrical pressure head.
5. a kind of three-point bending according to claim 1 shears field beam fatigue test clamper, it is characterised in that: support pressure head
It can be translated on crossbeam according to testpieces size.
6. a kind of three-point bending according to claim 1 shears field beam fatigue test clamper, it is characterised in that: the end plate
(2) upper end has been connected through a screw thread newel post.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822021543.8U CN209513419U (en) | 2018-12-04 | 2018-12-04 | A kind of three-point bending shearing field beam fatigue test clamper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822021543.8U CN209513419U (en) | 2018-12-04 | 2018-12-04 | A kind of three-point bending shearing field beam fatigue test clamper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209513419U true CN209513419U (en) | 2019-10-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201822021543.8U Active CN209513419U (en) | 2018-12-04 | 2018-12-04 | A kind of three-point bending shearing field beam fatigue test clamper |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110763555A (en) * | 2019-11-18 | 2020-02-07 | 南京航空航天大学 | Three-point bending fatigue test fixture supporting negative stress ratio |
| CN113092290A (en) * | 2021-03-26 | 2021-07-09 | 太原理工大学 | External prestress reinforced concrete beam fatigue test device and method |
-
2018
- 2018-12-04 CN CN201822021543.8U patent/CN209513419U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110763555A (en) * | 2019-11-18 | 2020-02-07 | 南京航空航天大学 | Three-point bending fatigue test fixture supporting negative stress ratio |
| CN113092290A (en) * | 2021-03-26 | 2021-07-09 | 太原理工大学 | External prestress reinforced concrete beam fatigue test device and method |
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