CN1046223A - Pressure is cut compound loading scheme and device - Google Patents
Pressure is cut compound loading scheme and device Download PDFInfo
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- CN1046223A CN1046223A CN 89102131 CN89102131A CN1046223A CN 1046223 A CN1046223 A CN 1046223A CN 89102131 CN89102131 CN 89102131 CN 89102131 A CN89102131 A CN 89102131A CN 1046223 A CN1046223 A CN 1046223A
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- loading
- loading blocks
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- seat
- shearing
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Abstract
The invention belongs to the structural experiment mechanics field.Providing a kind of realizes the pressure of rectangular slab is cut the method and the device of compound loading with single axial compression on the usual pressure testing machine.Its basic skills is that four limits link to each other with four oblique loading blocks, loading blocks flush end pressurized with angle [alpha] of breadboard inclination of general normal setting.The inventive method is easy, and device is simple, and experimentation cost is low, and technique effect is good, can be widely used in product structures such as aircraft, naval vessels in the stability and the strength of materials experimental study under complex stress condition under the compound stand under load.
Description
The invention belongs to structural experiment mechanical technology field.
Dull and stereotyped and reinforcement flat board is the typical primary structure member in the structures such as aircraft aerofoil, naval vessels, they all are in pressure (contracting) mostly and cut (cutting) compound stress, and it is a class important subject in the structural mechanics that this class A of geometric unitA is cut stability (flexing) under compound and intensity in pressure.Very difficult owing to monolithic flat board, stiffened panel realization pressure being cut compound loading, for a long time, all be to be subjected to single compressed and the test findings that is subjected to pure shear load on the engineering with plate, method by " correlation formula " experience or that analyze, the stability of estimation plate under combined load, and the intensity of sheet material under the complicated applied force state.In order to check its actual strength, have only the bending connected load that combines " box section " (or claim " box beam ") by a spot of plate to test in addition verification experimental verification.Do like this, do a plate test, need with four test specimens, costly.Especially for the very expensive advanced composite structure of price, adopt " box section " to carry out experimental study widely and hardly may.
In order to address this problem, the present invention proposes a kind ofly by single axial compression, realize rectangular flat and reinforcement rectangular flat are applied pressure, cut the new method of compound loading.And developed isolated plant (anchor clamps) by this principle, and utilize this device on the usual pressure testing machine, to apply even compression simultaneously and to shear combined load to rectangular flat, reinforcement rectangular flat, carry out the experimental study of the stability and the strength of materials of plate.
Accompanying drawing one is for being in the force diagram of the rectangular slab under the even axial compression.
Ultimate principle of the present invention is: if take out a rectangular slab ABCD in the rectangular slab under the even axial compression being in shown in the accompanying drawing one, it is in bi-directional compression and pure shearing according to force analysis, and the wallboard of actual components is in the compound stress of unidirectional axial compression Nx and pure shear Nxy mostly, therefore, as long as manage to eliminate transverse pressure Ny, can simulate the stressing conditions (Nx+Nxy) of actual components.
Accompanying drawing two has provided realizes method sketch of the present invention.
Realize that concrete grammar of the present invention is:
1. with angle [alpha] of rectangular slab inclination of general vertical placement, make its four limits and I
1(upper right), I
2(lower-left), II
1(upper left) II
2(bottom right) four oblique loading blocks link to each other, and when the flush end of loading blocks is subjected to even axial compression, then make rectangular slab ABCD be subjected to compound loading (Nx+Ny+Nxy).If the axial compression of testing machine makes a concerted effort to be P, then being respectively with joint efforts of I (upper right, lower-left), II (upper left, bottom right) loading blocks flush end:
PⅠ＝a/cPcosα
PⅡ＝b/cPsinα
A, b are respectively the length and the width of rectangular slab in the formula, and c is the total length of loading blocks flush end.Pass to the axial pressure Nx and the shearing Nxy of rectangular slab end face AB limit (top right-hand side), CD limit (left lower side) by the inclined-plane of I loading blocks
1Be respectively:
Nx＝a/cPcos
2α
Nxy
1＝a/cPcosαSinα
Pass to the shearing Nxy on rectangular slab side BG limit (right edge), AD limit (limit, left side) by the inclined-plane of II loading blocks
2Ny is respectively with horizontal pressure:
Nxy
2＝b/cPSinαCosα
Ny＝b/cPSin
2α
The suffered shearing flow in rectangular slab four limits is:
q＝Nxy
1/a＝Nxy
2/b＝p/cSinαCosα
Pressure is cut than being controlled by the inclination alpha of rectangular slab:
Nxy
1/Nx＝tgα
2. eliminate the transverse pressure Ny that is added on plate BC, the AD limit by a cover back-up system.Because of Ny self balance, back-up system can not influence testing machine and load, and can not make testing machine be subjected to additional load yet.
3., make it separate, and can tilt arbitrarily during loading blocks in design, with guarantee rectangular slab stressed after detrusion freely and compression.
4. for stiffened panel, cut the heart and press the heart to overlap for making, can adopt that two boards is back-to-back, the method for balanced configuration is solved.
5. for border conditions such as freely-supported, the folder of realizing rectangular slab four limits prop up, only need design in addition to overlap back-up system and get final product.
Accompanying drawing three has provided a kind of concrete installation drawing of realizing this method.
(1) is that pressing machine seaming chuck (or going up afterburning seat), (2) are for (spring) put in the refitting that disappears, (3) are that main loading blocks, (4) are hinged base for side loading blocks, (16) for pivoted end column, (17) for entablature, (12) for pivoted end column, (11) for pressure support, (10) for afterburning seat, (9) for sill, (8) for pin, (7) for load plate, (6) for hound, (5) among the figure.
Specify the present invention below in conjunction with accompanying drawing three.
Realize that device of the present invention is made up of loading system and back-up system two parts.Loading system is formed (17) by two main loading blocks (3), two side loading blocks (12), two load plate (5), pin (6), afterburning seat (8), pivoted end column (10) (16), hinged base; Back-up system is put (spring) and is formed (2) by frame column (15), entablature (11), sill (7), hound (4), the refitting that disappears.Test specimen (rectangular slab) (14) places the loading system middle part, cuts than (Nxy by given pressure
1/ Nx=A) determine its tilting inclination alpha (α=a γ ctgA), four limits of plate link to each other with four separate masters, side loading blocks, the axial compression P of pressing machine passes through pivoted end column (10) (J by pressing machine seaming chuck (1), K) pass to flush end main, side loading blocks (3) (12), compound loading is then realized to test specimen (rectangular slab) (14) in inclined-plane main, the side loading blocks.The side of test specimen is processed with chute (13), links to each other with side loading blocks (12) with load plate (5) by bolt, also is connected with pin (6) on the load plate, and the transverse pressure Ny of side loading blocks hypotenuse passes to raker beam (4) by pin (6).Raker beam links to each other with frame column (15) and upper and lower crossbeam (11) (7), forms a stress frame, because Ny is self equilibrant, so framework is subjected to can not causing additional load to pressing machine behind the Ny.Because loading blocks adopts the chute form with being connected of test specimen, coupling bolt can be done laterally to slide along chute, and the Ny transverse pressure can not be added on the test specimen, and test specimen only bears the Nxy shearing.For making test specimen detrusion freely and compression deformation, set up a pivoted end column (16) again below following afterburning (8), by freely tilting of afterburning seat with shearing and the compression deformation that adapts to test specimen.
Accompanying drawing four has provided realizes another program of the present invention.
(1) is last afterburning seat in accompanying drawing four, (2) be that elimination fixed weight device (spring), (3) are the frame column, (4) are that main loading blocks, (5) are for adding shearing ear seat, (6) for holding transverse pressure ear seat, (7) for side loads the ear seat, (8) are that hinged base, (10) are that pivoted end column, (11) are that entablature, (12) are afterburning seat under pivoted end column, (15) are for test specimen, (13) for coupling bolt, (14) for lower brace beam, (9).
The pressure that this scheme provided is cut the compound loading anchor clamps and also is made up of loading system and back-up system two parts.Loading system is added by two main loading blocks (4), two that shearing ear seat (5), two sides load ear seat (7), coupling bolt (13), hinged base (9), pivoted end column (10) (14), go up afterburning seat (1), afterburning seat (15) is formed down; Back-up system is by frame column (3), bolster (11) (8), two hold transverse pressure ear seat (6), eliminate fixed weight device (spring) and form up and down.When pressing machine is exerted pressure P, pressure P passes to main loading blocks (4) by pivoted end column (10) (K, J) and side loads ear seat (6), is subjected to pressing uniformly cutting combined load (Nx+Nxy) on the rectangular slab test specimen limit that the concentrated force process diffusion of main loading blocks flush end links to each other its hypotenuse.The side of test specimen with add shearing ear seat (5) and link to each other, have horizontal concrete chute on the shearing ear seat, load ear seat (7) and hold transverse pressure ear seat (6) and link to each other by coupling bolt (13) and side, hold on the transverse pressure ear seat and have vertical chute.The concentrated force that side loads ear seat flush end makes shearing ear seat be subjected to shearing perpendicular to its chute direction by coupling bolt (13), as long as the design of the height of shearing ear seat is suitable, make the test specimen side only bear uniform shearing Nxy after concentrating shearing through diffusion, coupling bolt makes simultaneously and holds transverse pressure ear seat and be subjected to horizontal pressure Ny perpendicular to its chute direction, because transverse pressure Ny self balance on limit, the left and right sides, so when it import into by column (3) and up and down bolster (11) (8) form back-up system the time, can not cause additional load to pressing machine.Thereby being in, test specimen presses the stress of cutting compound Nx+Nxy.Similar with last scheme, below following afterburning seat (15), set up a pivoted end column (14) again, by freely tilting of afterburning seat with shearing and the compression deformation that adapts to test specimen.
Be to realize that the typical freely-supported on test specimen four limits and folder wait the border condition, also need design in addition to add back-up system (not shown in the accompanying drawing four), the mode of taking front and back at plate that the edge of a knife is set usually can realize the simple boundary condition; The mode of taking front and back at plate that clamping is set can realize a folder border condition.
Claims (4)
1, a kind ofly on the usual pressure testing machine, rectangular flat, reinforcement rectangular flat are applied the method that even pressure is cut combined load simultaneously, it is characterized in that four limits of plate link to each other with four oblique loading blocks, loading blocks flush end pressurized with the plate angle [alpha] that tilts.Dull and stereotyped institute pressurized shearing load ratio can be by adjusting inclination alpha control.
2, a kind of device of realizing the described method of claim 1 is characterized in that it is made up of loading system and back-up system two parts.
3, a kind of as claim 1 and 2 described devices, it is characterized in that loading system is made up of two main loading blocks, two side loading blocks, load plate, pin, afterburning seat, hinged bases; Back-up system is put (spring) and is formed by frame column, entablature, sill, hound, the refitting that disappears.
4, a kind of as claim 1 and 2 described devices, it is characterized in that loading system also can add shearing ear seat, hinged base, coupling bolt, hinged-support by two main loading blocks, two, afterburning seat is formed up and down, the back-up system of this moment is by the frame column, bolster, two hold transverse pressure ear seat, eliminate fixed weight and adorn (spring) and form up and down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89102131 CN1016277B (en) | 1989-04-07 | 1989-04-07 | Pressure is cut compound loading scheme and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89102131 CN1016277B (en) | 1989-04-07 | 1989-04-07 | Pressure is cut compound loading scheme and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1046223A true CN1046223A (en) | 1990-10-17 |
| CN1016277B CN1016277B (en) | 1992-04-15 |
Family
ID=4854550
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89102131 Expired CN1016277B (en) | 1989-04-07 | 1989-04-07 | Pressure is cut compound loading scheme and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1016277B (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1307414C (en) * | 2005-04-11 | 2007-03-28 | 南京航空航天大学 | Tensile-shear compressive-shear complex loading tester |
| CN102539243A (en) * | 2012-01-16 | 2012-07-04 | 上海交通大学 | Device for testing compression in rectangular steel plate surface |
| CN102607940A (en) * | 2012-03-26 | 2012-07-25 | 南京航空航天大学 | Tensile-shear test loading device with flight structure |
| CN102735545A (en) * | 2012-07-04 | 2012-10-17 | 哈尔滨工业大学 | Two-way compressing and shearing composite loading test device |
| CN103033418A (en) * | 2012-12-10 | 2013-04-10 | 中国飞机强度研究所 | Test device capable of evenly applying axial compression load and shearing load |
| CN106198200A (en) * | 2016-07-06 | 2016-12-07 | 哈尔滨理工大学 | A kind of multi-angle compression test fixture bearing heavy duty |
| CN107748104A (en) * | 2017-09-05 | 2018-03-02 | 中建商品混凝土有限公司 | The method of testing of 3D printing building structure bond strength between layers |
| CN108760533A (en) * | 2018-05-08 | 2018-11-06 | 东南大学 | The experimental rig and test method of the shearing strength of UHPC-NC bonding interfaces |
| CN109870368A (en) * | 2017-12-01 | 2019-06-11 | 中国飞机强度研究所 | A kind of crane torsion test device and method |
| CN111595699A (en) * | 2020-06-18 | 2020-08-28 | 中国飞机强度研究所 | Straight wallboard compression shear test device |
| CN111982662A (en) * | 2020-09-30 | 2020-11-24 | 攀钢集团攀枝花钢铁研究院有限公司 | Device and test method for detecting shear strength of composite steel plate |
| CN112014211A (en) * | 2020-08-26 | 2020-12-01 | 南京信息工程大学 | Geotechnical self-adaptive deformation micro-friction loading plate |
| CN114397186A (en) * | 2022-01-16 | 2022-04-26 | 李成虎 | Test device for combined action of normal pressure and other loads of composite material laminated plate |
-
1989
- 1989-04-07 CN CN 89102131 patent/CN1016277B/en not_active Expired
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1307414C (en) * | 2005-04-11 | 2007-03-28 | 南京航空航天大学 | Tensile-shear compressive-shear complex loading tester |
| CN102539243A (en) * | 2012-01-16 | 2012-07-04 | 上海交通大学 | Device for testing compression in rectangular steel plate surface |
| CN102539243B (en) * | 2012-01-16 | 2013-08-28 | 上海交通大学 | Device for testing compression in rectangular steel plate surface |
| CN102607940A (en) * | 2012-03-26 | 2012-07-25 | 南京航空航天大学 | Tensile-shear test loading device with flight structure |
| CN102735545A (en) * | 2012-07-04 | 2012-10-17 | 哈尔滨工业大学 | Two-way compressing and shearing composite loading test device |
| CN102735545B (en) * | 2012-07-04 | 2014-02-12 | 哈尔滨工业大学 | Two-way compressing and shearing composite loading test device |
| CN103033418A (en) * | 2012-12-10 | 2013-04-10 | 中国飞机强度研究所 | Test device capable of evenly applying axial compression load and shearing load |
| CN103033418B (en) * | 2012-12-10 | 2015-04-29 | 中国飞机强度研究所 | Test device capable of evenly applying axial compression load and shearing load |
| CN106198200A (en) * | 2016-07-06 | 2016-12-07 | 哈尔滨理工大学 | A kind of multi-angle compression test fixture bearing heavy duty |
| CN107748104A (en) * | 2017-09-05 | 2018-03-02 | 中建商品混凝土有限公司 | The method of testing of 3D printing building structure bond strength between layers |
| CN107748104B (en) * | 2017-09-05 | 2020-12-08 | 中建商品混凝土有限公司 | Method for testing interlayer bonding strength of 3D printing building structure |
| CN109870368A (en) * | 2017-12-01 | 2019-06-11 | 中国飞机强度研究所 | A kind of crane torsion test device and method |
| CN108760533A (en) * | 2018-05-08 | 2018-11-06 | 东南大学 | The experimental rig and test method of the shearing strength of UHPC-NC bonding interfaces |
| CN111595699A (en) * | 2020-06-18 | 2020-08-28 | 中国飞机强度研究所 | Straight wallboard compression shear test device |
| CN112014211A (en) * | 2020-08-26 | 2020-12-01 | 南京信息工程大学 | Geotechnical self-adaptive deformation micro-friction loading plate |
| CN112014211B (en) * | 2020-08-26 | 2022-04-01 | 南京信息工程大学 | Geotechnical self-adaptive deformation micro-friction loading plate |
| CN111982662A (en) * | 2020-09-30 | 2020-11-24 | 攀钢集团攀枝花钢铁研究院有限公司 | Device and test method for detecting shear strength of composite steel plate |
| CN111982662B (en) * | 2020-09-30 | 2022-03-22 | 攀钢集团攀枝花钢铁研究院有限公司 | Device and test method for detecting shear strength of composite steel plate |
| CN114397186A (en) * | 2022-01-16 | 2022-04-26 | 李成虎 | Test device for combined action of normal pressure and other loads of composite material laminated plate |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1016277B (en) | 1992-04-15 |
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