CN202793913U - Bending preventing clamp under tensile load effect - Google Patents
Bending preventing clamp under tensile load effect Download PDFInfo
- Publication number
- CN202793913U CN202793913U CN 201220212469 CN201220212469U CN202793913U CN 202793913 U CN202793913 U CN 202793913U CN 201220212469 CN201220212469 CN 201220212469 CN 201220212469 U CN201220212469 U CN 201220212469U CN 202793913 U CN202793913 U CN 202793913U
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- China
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- upper frame
- tensile load
- bending preventing
- preventing clamp
- lower frame
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- Expired - Lifetime
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Abstract
The utility model relates to a bending preventing clamp for a lap joint test component under tensile load effect. The bending preventing clamp comprises an upper frame, a lower frame and a clamping bolt, wherein the upper frame has a structure in a shape of a Chinese character 'YUE' or 'KOU'; bolt holes are distributed at the two sides of the upper frame; and the lower frame has a structure in a shape of a Chinese character 'KOU'; the bolt holes are distributed at the two sides of the lower frame; the appearance size of the upper frame is the same as that of the lower frame; and the upper frame and the lower frame are connected by the clamping bolt. According to the bending preventing clamp with such design and arrangement, an ideal tack hole extruding stress distributing state is given to the lap joint test component under the effect of tensile load, and the failure mode of the test component is closer to the true mode, so that the highly-accurate allowable stress value for tack hole extruding can be gained. The bending preventing clamp can be widely applied to the tensile load test for the lap joint test component of an aircraft structure.
Description
Technical field
The utility model relates to a kind of anti-bending anchor clamps of joint test spare under the tensile load effect that overlap.
Background technology
The overlap joint connected mode is widely used in the vertical opposite joint of covering, long purlin joint and long purlin-positions such as frame joint.When overlapping the test of connection tensile load, because the tensile load active line departs from the middle face position in bonding pad (test examination district), produce additional bending moment in the bonding pad, cause the bonding pad to occur bending and deformation, cause that thus rivet pulls and follow closely the series of problems such as the hole stress distribution is inhomogeneous.For solving problems, extensively adopt the method that thickens loading end on the engineering, to guarantee the middle face position consistency (as shown in Figure 1) of tensile load active line and bonding pad.Because it is simple to thicken the method for loading end, more adopting said method is implemented the tensile load test that overlap joint connects on the engineering.Although this test design method has guaranteed loading end load axis and the consistance of examining face position in the district, but by the analysis to the load bang path, the district also will produce additional bending moment in the test examination, fundamentally not solve the web member flexural deformation of examination district, nail hole stress in problems such as thickness direction skewness.
Summary of the invention
The purpose of this utility model is to propose a kind of testpieces overlap that can prevent to produce diastrophic anti-bending anchor clamps under the tensile load effect.Technical solution of the present utility model is, anchor clamps comprise upper frame, underframe and fishbolt, upper frame is " saying " font or " mouth " font mouth mount structure, bolt hole is arranged in the both sides of upper frame, underframe is " mouth " font mouth mount structure, bolt hole is arranged in the both sides of underframe, and upper frame is identical with underframe physical dimension, and upper frame is connected by fishbolt with underframe.Advantage and the beneficial effect that the utlity model has are that the utility model manufactures and designs, and simple, practical anti-bending effect is remarkable.Design and installation by these anti-bending anchor clamps, make overlap joint joint test spare under the tensile load effect, obtain desirable nail hole extrusion stress distribution, the testpieces failure mode has obtained following closely more accurately hole extruding permissible stress value closer to true failure mode.These anti-bending anchor clamps can be widely used in the tensile load test of aircaft configuration overlap joint joint test spare.
Description of drawings
Fig. 1 is the prior art synoptic diagram;
Fig. 2 is the utility model structural representation.
Fig. 3 is the side view of Fig. 2.
Embodiment
Below in conjunction with accompanying drawing the utility model is elaborated.Anchor clamps comprise upper frame 1, underframe 2 and fishbolt 3, upper frame is " saying " font or " mouth " font mouth mount structure, bolt hole is arranged in the both sides of upper frame 1, underframe is " mouth " font mouth mount structure, bolt hole is arranged in the both sides of underframe 2, upper frame 1 is identical with underframe 2 physical dimension, and upper frame 1 is connected by fishbolt 3 with underframe 2.
The steel materials such as anti-bending anchor clamps employing 30CrMnSiA of overlap joint joint test spare under the tensile load effect processes, and guaranteed the result of use of anti-bending anchor clamps.Anti-bending anchor clamps are frame type combined structure, are comprised of two holding frames up and down, and testpieces examination section is positioned between two holding frames.
Upper frame 1 is that " saying " font machine adds structure, and upper frame thickness is 8mm, guarantees its clamping rigidity.Interfere for the securing member after preventing anti-bending anchor clamps and being out of shape, underframe 2 adopts " mouth " font machines to add structure, and underframe thickness is 8mm, guarantees its clamping rigidity.
Holding frame adopts 6 fishbolts to connect altogether up and down, simultaneously also can be by regulating the fishbolt realization to the clamping of different-thickness testpieces.The installation of anti-bending anchor clamps will guarantee to minimize clamping force to the impact of test findings.
Claims (1)
1. anti-bending anchor clamps under the tensile load effect, it is characterized in that, anchor clamps comprise upper frame, underframe and fishbolt, upper frame is " saying " font or " mouth " font mouth mount structure, bolt hole is arranged in the both sides of upper frame, and underframe is " mouth " font mouth mount structure, and bolt hole is arranged in the both sides of underframe, upper frame is identical with underframe physical dimension, and upper frame is connected by fishbolt with underframe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220212469 CN202793913U (en) | 2012-05-11 | 2012-05-11 | Bending preventing clamp under tensile load effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220212469 CN202793913U (en) | 2012-05-11 | 2012-05-11 | Bending preventing clamp under tensile load effect |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202793913U true CN202793913U (en) | 2013-03-13 |
Family
ID=47821157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220212469 Expired - Lifetime CN202793913U (en) | 2012-05-11 | 2012-05-11 | Bending preventing clamp under tensile load effect |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202793913U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104198277A (en) * | 2014-09-01 | 2014-12-10 | 北京航空航天大学 | Anti-instability clamp for determining compression performance of edge-notch-containing composite-material laminated board |
| CN106017884A (en) * | 2016-05-31 | 2016-10-12 | 中国航空工业集团公司西安飞机设计研究所 | Anti-bending design method of airplane single lap structure test article |
| CN116296302A (en) * | 2022-09-09 | 2023-06-23 | 中国航发沈阳发动机研究所 | Typical bending part stress test piece of rear casing structure of turbine |
-
2012
- 2012-05-11 CN CN 201220212469 patent/CN202793913U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104198277A (en) * | 2014-09-01 | 2014-12-10 | 北京航空航天大学 | Anti-instability clamp for determining compression performance of edge-notch-containing composite-material laminated board |
| CN106017884A (en) * | 2016-05-31 | 2016-10-12 | 中国航空工业集团公司西安飞机设计研究所 | Anti-bending design method of airplane single lap structure test article |
| CN106017884B (en) * | 2016-05-31 | 2018-07-13 | 中国航空工业集团公司西安飞机设计研究所 | A kind of anti-bending design method of aircraft list bridging arrangement testpieces |
| CN116296302A (en) * | 2022-09-09 | 2023-06-23 | 中国航发沈阳发动机研究所 | Typical bending part stress test piece of rear casing structure of turbine |
| CN116296302B (en) * | 2022-09-09 | 2023-11-03 | 中国航发沈阳发动机研究所 | Typical bending part stress test piece of rear casing structure of turbine |
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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 |
Granted publication date: 20130313 |
|
| CX01 | Expiry of patent term |