CN205067219U - ECC axial tension anchor clamps - Google Patents
ECC axial tension anchor clamps Download PDFInfo
- Publication number
- CN205067219U CN205067219U CN201520784111.6U CN201520784111U CN205067219U CN 205067219 U CN205067219 U CN 205067219U CN 201520784111 U CN201520784111 U CN 201520784111U CN 205067219 U CN205067219 U CN 205067219U
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- CN
- China
- Prior art keywords
- ball
- master slice
- rod member
- centre gripping
- clamping
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- Expired - Fee Related
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
ECC axial tension anchor clamps belongs to frock clamp technical field. Twist by the ball, the centre gripping master slice, the T type is adjusted member and the type of falling T regulation member etc. And is constituteed, lower two parts, upper portion is twisted by the ball, the centre gripping master slice is adjusted the member through the type of falling T and is connected to form, the type of falling T is adjusted the member upper end and is connected the ball hank, the type of falling T is adjusted the member lower extreme and is connected the centre gripping master slice, ball hank upper end is equipped with the ball shed stick that is used for the testing machine centre gripping, the lower part branch is equipped with the centre gripping master slice and the member is adjusted to the T type, the T type is adjusted the member upper end and is connected the centre gripping master slice, the supporting rod of member lower extreme for being used for the testing machine centre gripping is adjusted to the T type. The ball hank comprises hollow sleeve of steel cylinder and steel ball, and the centre gripping master slice comprises bottom plate, screw bolt and nut. Can eliminate or alleviate the influence that off -centre was drawn through ball hank, the selection of the screw rod length through the centre gripping master slice realizes the centre gripping of thick test piece, and rational in infrastructure simple, the preparation is simple and convenient, and is with low costs, and repeatedly usable also can be used to the centre gripping tensile test of test piece such as cement mortar.
Description
Technical field
The utility model relates to a kind of fixture, in particular for the clamp structure of ECC direct tensile test.
Background technology
ECC(EngineeredCementitiousComposites) be a kind of novel compound substance, its most significant characteristic has strain hardening characteristic exactly.So-called strain hardening, just refers in tension test, before ultimate tensile strength arrives, and the characteristic that tension increases along with stretching strain and increases.
For ECC tension test, test specimen generally adopts the method for external clamping, uses adhesive type individually, due to sample dimensions restriction rarely scholar adopt the test method of built-in type.Usually adopt universal testing machine to carry out in external clamping tension test, but due to the kind of testing machine different, measure of precision is also different, and the drawing effect of the testing machine of different accuracy is also variant.Wherein affecting larger is the impact of eccentric tension.Although the factors such as slight initial eccentricity is to the ultimate tensile strength (UTS) of ECC material, limit tensile strain impact is little, the impact of eccentric tension still can not be ignored.
In addition, the clamping thickness of testing machine is the another influence factor that ECC stretches, ordinary test machine clamping thickness 0-15mm, and the thickness that ECC commonly uses is 12mm or 15mm, reinforce owing to must use epoxy resin affixing carbon fabric and aluminium flake in the end of ECC test specimen, its clamping thickness reaches 15-20mm, and the more difficult realization of ordinary test machine successfully clamps.
Therefore, we are when service-test machine carries out ECC uniaxial direct tensile, and need design one can eliminate or alleviate eccentric tension impact and can take into account in different sample dimensions situation, different tests machine has the stretching clamp of general applicability under using.
Utility model content
The purpose of this utility model is to provide a kind of ECC axial tension fixture of practicality, can eliminate or alleviate Influence from Eccentric, and makes tension test not by the restriction of specimen thickness.When using this fixture to carry out ECC direct tensile test, the most significant strain hardening phenomenon of ECC material can be there is.
The purpose of this utility model realizes like this, ECC axial tension fixture, be provided with ball strand, clamping master slice, T-shaped adjustment rod member and inverted T shape regulate rod member, ball twists, clamping master slice, T-shaped adjustment rod member and inverted T shape regulate on rod member composition, lower two parts, top is twisted by ball, clamping master slice regulates rod member to connect to form by inverted T shape, inverted T shape regulates rod member upper end to connect ball strand, inverted T shape regulates rod member lower end to connect clamping master slice, ball strand upper end is provided with the ball shed stick for test machine clamping, lower part comprises clamping master slice and T-shaped adjustment rod member, T-shaped adjustment rod member upper end connects clamping master slice, T-shaped adjustment rod member lower end is the supporting rod for test machine clamping.
Described ball strand is made up of steel cylinder cannulated sleeve and upper and lower two steel balls, and upper and lower two steel balls are arranged in right cylinder cannulated sleeve, and upper steel ball is connected with described ball shed stick, and lower steel ball and described inverted T shape regulate rod member upper end to be connected.
Described clamping master slice comprises the base plate of two pieces of steel, four bolts and four nuts, four angles of base plate are respectively equipped with hole, four bolts pass two pieces of base plates by four holes, four nuts are screwed on four bolts respectively, be provided with the gap of clamping test pieces between two pieces of base plates, inside base plate, be provided with the indenture polished.
The utility model is simply rational in infrastructure, and upper and lower two clamping master slices clamp test specimen by the physical connection mode of bolts and nuts, and clamping master slice forms by two pieces of steel substrate, and inner side polish indenture, for increasing friction force with test specimen.Four bolts are by being distributed in four holes at base plate four angles, and through two pieces of base plates, test specimen is placed in the middle of two pieces of base plates, by nut screwing clamping after adjustment placement location.
The advantage of this fixture is:
the impact of eccentric tension can be eliminated or alleviate by ball strand, the level of rod member, T-shaped adjustment rod member can be regulated to the position of regulatory function adjustment test specimen by inverted T shape simultaneously, improve drawing effect further, when using this fixture to carry out ECC direct tensile test, there is the most significant strain hardening phenomenon of ECC material.
by clamping the selection of the spiro rod length of master slice, can realize the clamping of thicker test specimen, avoid because the shaping rear test machine clamping thickness of test specimen making is too small, the situation that tension test cannot be carried out, makes tension test by the restriction of specimen thickness.
fixture is made by common iron, and material grade is higher than Q235, simple for production, and cost is low, can repeatedly use, and avoids unnecessary waste.Also can be used for the grab tensile test of the test specimens such as sand-cement slurry.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is side-looking structural representation of the present utility model.
Fig. 3 is ball of the present utility model strand structural representation.
Fig. 4 is clamping master slice structure schematic diagram of the present utility model.
In figure: 1 ball shed stick, 2 ball strands, 3 inverted T shapes regulate rod member, 4 bolts, 5 nuts, 6 clamping master slices, 7T type to regulate rod member, 8 right cylinder cannulated sleeves, 9 steel balls, 10 holes, 11 indentures, 12 supporting rods, 13 base plates, 14 connecting holes.
Embodiment
As Fig. 1, Fig. 2, Fig. 3, shown in Fig. 4, ECC axial tension fixture, 2 are twisted by ball, clamping master slice 6, T-shaped adjustment rod member 7 and inverted T shape regulate the compositions such as rod member 3, ball twists, clamping master slice, T-shaped adjustment rod member and inverted T shape regulate on rod member composition, lower two parts, top twists 2 by ball, clamping master slice 6 regulates rod member 3 to connect to form by inverted T shape, inverted T shape regulates rod member upper end to connect ball strand, inverted T shape regulates rod member lower end to connect clamping master slice, ball strand upper end is provided with the ball shed stick 1 for test machine clamping, lower part is provided with clamping master slice and T-shaped adjustment rod member, T-shaped adjustment rod member upper end connects clamping master slice, T-shaped adjustment rod member lower end is extended for the supporting rod 12 for test machine clamping.Ball strand is made up of steel cylinder cannulated sleeve 8 and upper and lower two steel balls 9, and upper and lower two steel balls are arranged in right cylinder cannulated sleeve, and upper steel ball is connected with described ball shed stick, and lower steel ball and described inverted T shape regulate rod member upper end to be connected.Clamping master slice comprises base plate 13, four bolts 4 and four nuts 5 of two pieces of steel, base plate is provided with for the connecting hole regulating rod member with inverted T shape, T-shaped adjustment rod member is connected, four angles of base plate are respectively equipped with hole 10, four bolts pass two pieces of base plates by four holes, four nuts are screwed on four bolts respectively, the gap of clamping test pieces is provided with between two pieces of base plates, the indenture 11 polished is provided with inside base plate, for increasing the friction factor between base plate and test specimen, specimen holder is obtained more reliable and more stable.
When adopting the utility model to carry out ECC test specimen axial tension test, first ECC tensile test specimen bare terminal end being put in the middle of clamping master slice, the adjustable blessing thickness of setting nut, when placing test specimen, test specimen being placed placed in the middle, fastening nut, utilizes indenture to add friction force clamping test specimen; Again the ball shed stick that ball twists is placed in V-type intermediate plate on testing machine, clamping; The supporting rod 12 that T-shaped adjustment rod member extends is placed in V-type intermediate plate under testing machine, clamping; Then regulate rod member and T-shaped adjustment rod member by inverted T shape, after regulating test specimen placement location in the horizontal direction, can tension test be started.After off-test, unclamping nut can unload test specimen.Fixture can repeatedly use.ECC axial tension fixture can be eliminated or alleviate Influence from Eccentric, and when using this fixture to carry out ECC direct tensile test, has occurred the most significant strain hardening phenomenon of ECC material.
Claims (3)
1.ECC axial tension fixture, it is characterized in that, be provided with ball strand, clamping master slice, T-shaped adjustment rod member and inverted T shape regulate rod member, ball twists, clamping master slice, T-shaped adjustment rod member and inverted T shape regulate on rod member composition, lower two parts, top is twisted by ball, clamping master slice regulates rod member to connect to form by inverted T shape, inverted T shape regulates rod member upper end to connect ball strand, inverted T shape regulates rod member lower end to connect clamping master slice, ball strand upper end is provided with the ball shed stick for test machine clamping, lower part comprises clamping master slice and T-shaped adjustment rod member, T-shaped adjustment rod member upper end connects clamping master slice, T-shaped adjustment rod member lower end is the supporting rod for test machine clamping.
2. ECC axial tension fixture according to claim 1, it is characterized in that, described ball strand is made up of steel cylinder cannulated sleeve and upper and lower two steel balls, upper and lower two steel balls are arranged in right cylinder cannulated sleeve, upper steel ball is connected with described ball shed stick, and lower steel ball and described inverted T shape regulate rod member upper end to be connected.
3. ECC axial tension fixture according to claim 1, it is characterized in that, described clamping master slice comprises the base plate of two pieces of steel, four bolts and four nuts, four angles of base plate are respectively equipped with hole, four bolts pass two pieces of base plates by four holes, four nuts are screwed on four bolts respectively, be provided with the gap of clamping test pieces, be provided with the indenture polished inside base plate between two pieces of base plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520784111.6U CN205067219U (en) | 2015-10-12 | 2015-10-12 | ECC axial tension anchor clamps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520784111.6U CN205067219U (en) | 2015-10-12 | 2015-10-12 | ECC axial tension anchor clamps |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205067219U true CN205067219U (en) | 2016-03-02 |
Family
ID=55393759
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520784111.6U Expired - Fee Related CN205067219U (en) | 2015-10-12 | 2015-10-12 | ECC axial tension anchor clamps |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205067219U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107449661A (en) * | 2017-09-21 | 2017-12-08 | 北京工业大学 | A kind of rectangular slat sheet-type test specimen tensile test fixture |
| CN107957371A (en) * | 2017-12-18 | 2018-04-24 | 西安建筑科技大学 | A kind of fixture for bamboo chip tension test |
| CN109030192A (en) * | 2018-07-28 | 2018-12-18 | 中国石油天然气集团有限公司 | A kind of full-scale wide plate test fixture and installation method of automatic centering |
-
2015
- 2015-10-12 CN CN201520784111.6U patent/CN205067219U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107449661A (en) * | 2017-09-21 | 2017-12-08 | 北京工业大学 | A kind of rectangular slat sheet-type test specimen tensile test fixture |
| CN107449661B (en) * | 2017-09-21 | 2023-08-11 | 北京工业大学 | Rectangular strip thin plate type test piece tensile test clamp |
| CN107957371A (en) * | 2017-12-18 | 2018-04-24 | 西安建筑科技大学 | A kind of fixture for bamboo chip tension test |
| CN107957371B (en) * | 2017-12-18 | 2023-09-15 | 西安建筑科技大学 | Clamp for bamboo chip tensile test |
| CN109030192A (en) * | 2018-07-28 | 2018-12-18 | 中国石油天然气集团有限公司 | A kind of full-scale wide plate test fixture and installation method of automatic centering |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160302 Termination date: 20181012 |