CN204165829U - For determining the bearing in SCB test specimen orientation - Google Patents
For determining the bearing in SCB test specimen orientation Download PDFInfo
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- CN204165829U CN204165829U CN201420638448.1U CN201420638448U CN204165829U CN 204165829 U CN204165829 U CN 204165829U CN 201420638448 U CN201420638448 U CN 201420638448U CN 204165829 U CN204165829 U CN 204165829U
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- rectangular parallelepiped
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Abstract
The utility model relates to a kind of bearing.For determining the bearing in SCB test specimen orientation, comprise guide rail platform, travel(l)ing rest, locating support, base and screw rod; Guide rail platform is provided with the guide-track groove of convex shape groove; Travel(l)ing rest comprises column connecting portion, and there is support portion on its top, and connecting portion bottom is provided with the first fixed part, is provided with rectangular parallelepiped projection bottom it, and the first fixed part and rectangular parallelepiped projection are provided with the through hole communicated; Locating support comprises the connecting portion that top is connected with location division, and location division is provided with rectangular parallelepiped locating piece in upward direction, and connecting portion bottom is provided with the second fixed part, is provided with rectangular parallelepiped projection bottom it, and the second fixed part and rectangular parallelepiped projection are provided with the through hole communicated; Base is convex shape, and threaded hole is arranged at top, and top contacts with bottom rectangular parallelepiped projection, base and rectangular parallelepiped projection and guide-track groove match, travel(l)ing rest and locating support are fixed in guide-track groove by screw rod and base, are suitable for composite rupture toughness testing experiment, to determine test specimen orientation fast.
Description
Technical field
The utility model relates to a kind of bearing, especially relates to a kind of bearing for accurately determining SCB test specimen position and direction in hard brittle material composite rupture toughness testing experiment fast.
Background technology
As the hard brittle material of concrete, mild carbon steel, PMMA and PCBA and quasi-brittle material are widely used in civil engineering structure.The structural failure caused by composite mode crack brittle fracture is the modal failure mode of civil engineering structure, and its harmfulness is very big.In the rock engineering fields such as tunnelling, mining, unconventionaloil pool exploitation, need to carry out theory and experimental study to rock composite rupture, " to break " technology to instruct better and to develop rock, such as, in oil-gas mining hydraulic fracturing technology.Composite rupture toughness is the critical stress intensity factors of material under compound loading condition, is the critical strength parameter analyzing Crack Extension in fragility and quasi-brittle material, and the composite rupture toughness test therefore carrying out material is necessary.
Because fragility and quasi-brittle material tensile strength are far below its compressive strength and shearing strength, the I/II composite rupture toughness of therefore testing this type of material should be achieved by applying compressive load.And bending (the semi-circular bend of the semi-disc in belt edge crack, SCB) test specimen owing to having, processing is simple, material consumption is little, can to test from pure I type to pure II type all composite rupture toughness and simply load features such as (as conventional three-point bendings), therefore it is widely used in the composite rupture toughness test of rock-like materials, one of rock I type Statical pattern toughness method of testing that Ye Shi ISRM (ISRM) advises.But when utilizing traditional three-point bending bearing and SCB test specimen to carry out Material cladding fracture toughness testing, the plenty of time can be wasted in the position of adjustment test specimen on bearing and direction, cause test efficiency low, and all need to adjust it in each test; Meanwhile, because experiment operator is difficult to according to testing requirements exact placement test specimen, test findings error therefore can be caused large.Therefore, need a kind of bearing badly, position and the direction of SCB test specimen easily and accurately can be determined in SCB hard brittle material composite rupture toughness testing experiment.
Utility model content
The utility model, for solving the problems of the technologies described above, provides a kind of bearing for determining SCB test specimen orientation, makes it can determine SCB test specimen direction and position rapidly and accurately in SCB hard brittle material composite rupture toughness testing experiment.
The utility model solves the technical scheme that its technical matters adopts: for determining the bearing in SCB test specimen orientation, two travel(l)ing rests, locating support, base and screw rods comprise guide rail platform, being oppositely arranged; Described guide rail platform is provided with guide-track groove, and guide-track groove is convex shape groove; Travel(l)ing rest comprises column connecting portion, an avris on column connecting portion top is provided with the support portion for supporting SCB test specimen, an avris of column connecting portion bottom is provided with the first fixed part, be provided with rectangular parallelepiped projection bottom first fixed part, the first fixed part and rectangular parallelepiped projection are provided with the through hole be connected; Locating support is zigzag, comprise connecting portion, an avris on connecting portion top is connected with location division, one end xsect be provided with in upward direction for limiting SCB test specimen orientation of location division is rectangular parallelepiped locating piece, an avris of rectangular parallelepiped locating piece is perpendicular to guide rail platform, an avris of connecting portion bottom is provided with the second fixed part, rectangular parallelepiped projection is provided with bottom second fixed part, second fixed part and rectangular parallelepiped projection are provided with the through hole be connected, and the peak of travel(l)ing rest support portion and the bottom surface of locating support location division are in same level; Base is convex shape, its top is provided with the threaded hole suitable with screw rod, the top of base and the bottom connection of rectangular parallelepiped projection touch, and base and rectangular parallelepiped projection and convex shape groove match, travel(l)ing rest and locating support are fixed in guide-track groove by screw rod and base.
Concrete, described column connecting portion is rectangular parallelepiped connecting portion.
Concrete, the support portion of described travel(l)ing rest is semi-cylindrical.
Further, the half of described support portion is in the horizontal direction along the outside stretching in column connecting portion.
As the preferred version of such scheme, guide rail platform is provided with rule along the outside of convex shape groove.
Further, the bottom lengths of guide-track groove xsect 1mm longer than the bottom lengths of base.
Further, described through hole is threaded hole, the diameter 1mm larger than the diameter of the threaded hole of base of through hole.
The beneficial effects of the utility model are: structure is simple, easy to make, SCB test specimen putting position and direction can be determined convenient, exactly, the accuracy in test specimen putting position and direction in effective raising bending test, effectively avoid repeatedly due to the test error that test specimen putting position and direction cause in revision test, and improve test operation efficiency.The utility model is applicable to composite rupture toughness testing experiment.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation of the utility model when carrying out composite rupture toughness testing experiment;
Fig. 3 is the structural representation of the utility model embodiment middle guide platform;
Fig. 4 is the structural representation of travel(l)ing rest in the utility model embodiment;
Fig. 5 is the structural representation of locating support in the utility model embodiment;
Fig. 6 is the structural representation of base in the utility model embodiment.
Wherein, 1 is guide rail platform, and 11 is convex shape groove, 12 is rule, and 2 is travel(l)ing rest, and 21 is column connecting portion, 22 is support portion, and 23 is the first fixed part, and 3 is locating support, 31 is connecting portion, and 32 is location division, and 33 is rectangular parallelepiped locating piece, 34 is the second fixed part, and 4 is base, and 41 is threaded hole, 5 is screw rod, and 6 is SCB test specimen.
Embodiment
Below in conjunction with accompanying drawing, describe the technical solution of the utility model in detail.
As shown in Figures 1 to 6, the bearing for determining SCB test specimen orientation of the present utility model, two travel(l)ing rests 2, locating support 3, base 4 and the screw rod 5 that comprise guide rail platform 1, are oppositely arranged; Described guide rail platform 1 is provided with guide-track groove, and guide-track groove is convex shape groove 11;
Travel(l)ing rest 2 comprises column connecting portion 21, an avris on column connecting portion 21 top is provided with the support portion 22 for supporting SCB test specimen, an avris of column connecting portion 21 bottom is provided with the first fixed part 23, be provided with rectangular parallelepiped projection bottom first fixed part 23, the first fixed part 23 and rectangular parallelepiped projection are provided with the through hole be connected;
Locating support 3 is in zigzag, comprise connecting portion 31, an avris on connecting portion 31 top is connected with location division 32, one end of location division 32 is provided with the rectangular parallelepiped locating piece 33 for limiting SCB test specimen orientation in upward direction, an avris of rectangular parallelepiped locating piece 33 is perpendicular to guide rail platform 1, an avris of connecting portion 31 bottom is provided with the second fixed part 34, rectangular parallelepiped projection is provided with bottom second fixed part 34, second fixed part 34 and rectangular parallelepiped projection are provided with the through hole be connected, the peak of travel(l)ing rest 2 support portion and the bottom surface of locating support 3 location division are in same level, SCB test specimen is alignd, base is convex shape, its top is provided with the threaded hole suitable with screw rod 5, the bottom connection of the top of base and the rectangular parallelepiped projection of travel(l)ing rest 2 and locating support 3 touches, base and rectangular parallelepiped projection and convex shape groove match, travel(l)ing rest 2 and locating support 3 are fixed in guide-track groove by screw rod 5 and base 4.
As shown in Figure 3, guide rail platform 1 is provided with rule along the outside of convex shape groove 11, in each test, according to the position of the scale mark determination travel(l)ing rest 2 of guide rail platform 1 both sides and locating support 3, testing crew operation can be convenient to.The guide-track groove width of this routine middle guide platform and lower height 1mm larger than base 4 appropriate section, the i.e. bottom lengths of guide-track groove xsect 1mm longer than the bottom lengths of base, and lower height is than the height height 1mm of base 4 appropriate section, be convenient to the movement of base 4 in guide-track groove and fixing.
As shown in Figure 4, the column connecting portion of travel(l)ing rest 2 is the connecting portion of rectangular structure, and its support portion is semi-cylindrical, and the half of support portion is in the horizontal direction along the outside stretching in column connecting portion, and the bottom of support portion is connected with column connecting portion.Rectangular parallelepiped projection can be arranged at any position bottom the first fixed part, but for the ease of keeping balance, it is arranged at the center bottom the first fixed part.In SCB hard brittle material composite rupture toughness testing experiment, the support portion of two travel(l)ing rests 2 and the contact point of SCB test specimen are used as the strong point below SCB test specimen, therefore need its material to have high strength and high rigidity characteristic, can plow-steel be selected, as cemented steel 20CrMnTi.
Be the structural representation of locating support 3 as shown in Figure 5, its function is the left and right putting position for determining SCB test specimen, and makes the surface level of SCB test specimen plane and guide rail platform perpendicular.In like manner, locating support also can adopt cemented steel 20CrMnTi.
The through hole of described travel(l)ing rest 2 and the through hole of locating support 3 can be inner threadless smooth bore, now only need by the second fixed part of the first fixed part of travel(l)ing rest 2 and locating support 3 respectively with base firm contact, recycling screw rod 5, through through hole, screws with the threaded hole of base the position can fixing travel(l)ing rest 2 and locating support 3.In addition the through hole of travel(l)ing rest 2 and the through hole of locating support 3 also can be threaded hole, the internal thread of the threaded hole of the external thread of screw rod 5 and the internal thread of through hole and base matches, and namely travel(l)ing rest 2 and locating support 3 is fixed on guide rail platform 1 by screw rod 5 and base 4.Design like this, can make simple to operate, and is convenient in test unclamp screw rod, the position of mobile travel(l)ing rest 2 and locating support 3.Pad can be provided with, to strengthen bed knife between screw rod and travel(l)ing rest 2 and locating support 3.In actual applications, travel(l)ing rest 2 1mm larger than the diameter of the threaded hole of base with the diameter of the threaded hole of locating support 3 can be made, so that insert screw rod 5.
When testing, two travel(l)ing rests 2 and locating support 3 all can slide in guide-track groove, thus according to sample dimensions adjustment position, the position then screwing screw rod 5 pairs of supports is fixed.After in each test, two travel(l)ing rests 2 and locating support 3 position are fixed, SCB test specimen to be placed on travel(l)ing rest 2 and to make one end of SCB test specimen can determine the left and right putting position of SCB test specimen near the rectangular parallelepiped locating piece of locating support 3, and SCB test specimen plane is paralleled with guide-track groove axis.
Carrying out, in SCB hard brittle material composite rupture toughness testing experiment process, utilizing the detailed process of this bearing as follows:
A. according to SCB test design, determine the position of two travel(l)ing rests according to SCB sample dimensions, on guide rail platform, utilize screw rod and base to be fixed in guide-track groove by two travel(l)ing rests according to the position of determined travel(l)ing rest;
B. the distance of foundation SCB sample dimensions and test specimen Edge Distance bearing, and scale mark determination locating support position on guide rail platform of guide-track groove both sides, on guide rail platform, utilize screw rod to be fixed in guide-track groove by locating support according to the position of determined locating support, and the position of record location support institute is to scale;
C. SCB test specimen to be placed on travel(l)ing rest and to make one end of SCB test specimen near the rectangular parallelepiped locating piece of locating support, the left and right putting position of SCB test specimen can be determined, and make SCB test specimen plane and guide-track groove axis being parallel;
D. unclamp the screw rod of stationary positioned support, and locating support is slipped away SCB test specimen; Apply pressure, test material composite rupture toughness; After experimental test terminates, by locating support by first time remember that scale retightens;
E. repeat step C and step D, complete the composite rupture toughness test of this group SCB test specimen.
Above method can make after first time, experimental test terminated, by locating support by first time remember that scale retightens, continue to put SCB test specimen to test, effectively avoid repeatedly due to the test error that SCB test specimen putting position and direction cause in revision test, and improve test operation efficiency.
In addition, this bearing also can be used as the bearing in other all bending test, except SCB test specimen, also may be used for the test specimen orientation determining other kinds bending test.
Claims (7)
1. for determining the bearing in SCB test specimen orientation, it is characterized in that, comprising guide rail platform (1), two travel(l)ing rests (2) be oppositely arranged, locating support (3), base (4) and screw rod (5), described guide rail platform (1) is provided with guide-track groove, and guide-track groove is convex shape groove (11), travel(l)ing rest (2) comprises column connecting portion, an avris on column connecting portion top is provided with the support portion for supporting SCB test specimen, an avris of column connecting portion bottom is provided with the first fixed part, be provided with rectangular parallelepiped projection bottom first fixed part, the first fixed part and rectangular parallelepiped projection are provided with the through hole be connected, locating support (3) is in zigzag, comprise connecting portion, an avris on connecting portion top is connected with location division, one end of location division is provided with the rectangular parallelepiped locating piece for limiting SCB test specimen orientation in upward direction, an avris of rectangular parallelepiped locating piece is perpendicular to guide rail platform, an avris of connecting portion bottom is provided with the second fixed part, rectangular parallelepiped projection is provided with bottom second fixed part, second fixed part and rectangular parallelepiped projection are provided with the through hole be connected, the peak of travel(l)ing rest (2) support portion and the bottom surface of locating support (3) location division are in same level, base is convex shape, its top is provided with the threaded hole suitable with screw rod (5), the top of base and the bottom connection of rectangular parallelepiped projection touch, base and rectangular parallelepiped projection and convex shape groove match, travel(l)ing rest (2) and locating support (3) are fixed in guide-track groove by screw rod (5) and base (4).
2. as claimed in claim 1 for determining the bearing in SCB test specimen orientation, it is characterized in that, described column connecting portion is rectangular parallelepiped connecting portion.
3. as claimed in claim 1 for determining the bearing in SCB test specimen orientation, it is characterized in that, the support portion of described travel(l)ing rest (2) is semi-cylindrical.
4. as claimed in claim 3 for determining the bearing in SCB test specimen orientation, it is characterized in that, the half of described support portion is in the horizontal direction along the outside stretching in column connecting portion.
5. the bearing for determining SCB test specimen orientation as claimed in claim 1 or 2 or 3 or 4, is characterized in that, guide rail platform (1) is provided with rule (12) along the outside of convex shape groove (11).
6. as claimed in claim 5 for determining the bearing in SCB test specimen orientation, it is characterized in that, the bottom lengths 1mm longer than the bottom lengths of base of guide-track groove xsect.
7. as claimed in claim 6 for determining the bearing in SCB test specimen orientation, it is characterized in that, described through hole is threaded hole, the diameter 1mm larger than the diameter of the threaded hole of base of through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420638448.1U CN204165829U (en) | 2014-10-30 | 2014-10-30 | For determining the bearing in SCB test specimen orientation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420638448.1U CN204165829U (en) | 2014-10-30 | 2014-10-30 | For determining the bearing in SCB test specimen orientation |
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| Publication Number | Publication Date |
|---|---|
| CN204165829U true CN204165829U (en) | 2015-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420638448.1U Expired - Fee Related CN204165829U (en) | 2014-10-30 | 2014-10-30 | For determining the bearing in SCB test specimen orientation |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105352803A (en) * | 2015-11-30 | 2016-02-24 | 四川大学 | Multi-angle loading pressure head system for Brazilian split test |
| CN105571945A (en) * | 2015-12-18 | 2016-05-11 | 中国科学院地质与地球物理研究所 | Rock in-situ micro-tension sample and test method |
| CN107831067A (en) * | 2017-10-31 | 2018-03-23 | 河南理工大学 | A kind of variable Three Point Bending Creep Test method of rock |
| CN108519286A (en) * | 2018-04-27 | 2018-09-11 | 中国信息通信研究院 | A kind of load test equipment and test method for chute |
| CN109855957A (en) * | 2019-04-03 | 2019-06-07 | 四川大学 | A kind of rock three-point bending fixture for dimensional effect test |
| JP2021081433A (en) * | 2019-11-22 | 2021-05-27 | 燕山大学Ｙａｎｓｈａｎ Ｕｎｉｖｅｒｓｉｔｙ | Mechanical performance measuring device on which plate-shaped material is loaded repeatedly |
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2014
- 2014-10-30 CN CN201420638448.1U patent/CN204165829U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105352803A (en) * | 2015-11-30 | 2016-02-24 | 四川大学 | Multi-angle loading pressure head system for Brazilian split test |
| CN105571945A (en) * | 2015-12-18 | 2016-05-11 | 中国科学院地质与地球物理研究所 | Rock in-situ micro-tension sample and test method |
| CN107831067A (en) * | 2017-10-31 | 2018-03-23 | 河南理工大学 | A kind of variable Three Point Bending Creep Test method of rock |
| CN108519286A (en) * | 2018-04-27 | 2018-09-11 | 中国信息通信研究院 | A kind of load test equipment and test method for chute |
| CN109855957A (en) * | 2019-04-03 | 2019-06-07 | 四川大学 | A kind of rock three-point bending fixture for dimensional effect test |
| CN109855957B (en) * | 2019-04-03 | 2023-12-01 | 四川大学 | Rock three-point bending clamp for size effect test |
| JP2021081433A (en) * | 2019-11-22 | 2021-05-27 | 燕山大学Ｙａｎｓｈａｎ Ｕｎｉｖｅｒｓｉｔｙ | Mechanical performance measuring device on which plate-shaped material is loaded repeatedly |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150218 Termination date: 20181030 |
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| CF01 | Termination of patent right due to non-payment of annual fee |