CN204536106U - Centre burst Brazilian disc I, II and Mixed Mode Fracture assistant experiment device - Google Patents
Centre burst Brazilian disc I, II and Mixed Mode Fracture assistant experiment device Download PDFInfo
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- CN204536106U CN204536106U CN201520219593.0U CN201520219593U CN204536106U CN 204536106 U CN204536106 U CN 204536106U CN 201520219593 U CN201520219593 U CN 201520219593U CN 204536106 U CN204536106 U CN 204536106U
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- rotor
- main body
- face
- brazilian disc
- experiment device
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Abstract
The utility model discloses a kind of experiment equipment, especially a kind of centre burst Brazilian disc I, II and Mixed Mode Fracture assistant experiment device, comprise main body and rotor; Main body has the scale end face that anterior disk places end face and rear portion, main body is provided with and is through to from scale end face the mounting hole that end face placed by disk; Rotor has anterior installation end and the operating side at rear portion, installation end is provided with crackle mounting structure; Rotor is rotatably arranged in the mounting hole of main body, and the installation end of rotor and the disk of main body to place end face corresponding, operating side is corresponding with scale end face.Utilize the rotation of rotor can regulate the angle of crackle and added load in Brazilian disc; Use in directly contact Brazilian disc without the need to going with hand, pressing machine can be avoided like this to threaten to operator; Added by crackle and pressing machine, the angle of load can regulate arbitrarily, thus is conveniently suitable for, and meets different requirement of experiment.
Description
Technical field
The utility model relates to a kind of experiment equipment, especially a kind of centre burst Brazilian disc I, II and Mixed Mode Fracture assistant experiment device.
Background technology
" 20th century Theory and applications mechanics ten be in progress greatly " that authority's magazine " Proceedings of Mechanics " chooses, fracturing mechanics ranks the 2nd, is only second to finite element method, higher than biomechanics.Fracturing mechanics is 20th century one of solid mechanics significant achievements, is that construction material and component strength estimate the main theoretical basis with life prediction.
Centre burst Brazilian disc due to can realize I, II and Mixed Mode Fracture become the major experimental test specimen of fracture mechanics experiments.I, II and Mixed Mode Fracture is realized by change disc-shaped part and added load angle.
Present experimental technique is the angle making crackle and load reach certain, generally completed by following step: 1. find Crack Center with ruler, 2. protractor is measured certain angle and is drawn, 3. test specimen is placed on pressing machine, and hand steered good (avoiding disk to roll), 4. pressurization carried out by pressing machine.Due to the error of craft and the error of ruler and protractor itself, result in the inaccurate of crack inclination angle, this will produce larger impact to the result of experiment.And during pressurization except the people of on-stream pressure machine, need the hand steered disk of supernumerary, to avoid disk to roll, waste manpower, also produce certain potential safety hazard.And experimental procedure is comparatively loaded down with trivial details.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of easy to use and the centre burst Brazilian disc I, II of safety and Mixed Mode Fracture assistant experiment device.
The utility model solves the centre burst Brazilian disc I, II and Mixed Mode Fracture assistant experiment device that its technical matters adopts, and comprises main body and rotor; Described main body has the scale end face that anterior disk places end face and rear portion, described main body is provided with and is through to from scale end face the mounting hole that end face placed by disk; Described rotor has anterior installation end and the operating side at rear portion, described installation end is provided with crackle mounting structure; Described rotor is rotatably arranged in the mounting hole of main body, and the installation end of rotor and the disk of main body to place end face corresponding, operating side is corresponding with scale end face.
Further, described mounting hole is the shoulder hole that two ends diameter is large, mid diameter is little; It is stepped that described rotor is also that two ends diameter is large, mid diameter is little, and the larger installation end of root diameter is dismountable.
Further, the left and right sides that the disk of described main body is placed on end face is arranged with two barriers in parallel.
Further, described main body is unsymmetric structure, and the distance of described mounting hole and body top is less than the distance of mounting hole and lower body part.
Further, described crackle mounting structure comprises: the strip hole arranged on rotor installation end, with the installation sheet of strip hole form fit.
Further, described crackle mounting structure is two stationary shaft be vertically set on rotor installation end; Two stationary shaft symmetries are positioned at the both sides in the installation end center of circle, and diametrically same.
Further, the scale end face of described main body is provided with scale, the operating side of described rotor is provided with pointer.
Further, described rotor is matched with mounting hole by damping structure.
Further, described rotor wringing fit is arranged in mounting hole.
The beneficial effects of the utility model are: owing to have employed main body and rotating rotor, therefore can be arranged on rotor by crackle mounting structure by Brazilian disc, utilize the rotation of rotor can regulate the angle of crackle and added load in Brazilian disc; Use in directly contact Brazilian disc without the need to going with hand, pressing machine can be avoided like this to threaten to operator; Added by crackle and pressing machine, the angle of load can regulate arbitrarily, thus is conveniently suitable for, and meets different requirement of experiment.Main body can be set to unsymmetric structure, and this is that Brazilian disc exposes at top after mounting like this, thus pressing machine is acted directly in Brazilian disc.Rotor and mounting hole are coordinated by damping structure, can keep the rotational angle of rotor like this, avoid the rotor of the good angle of adjusted to misroute.
Accompanying drawing explanation
Fig. 1 is front elevation of the present utility model;
Fig. 2 is rear view of the present utility model;
Fig. 3 is that a left side of Fig. 1 is depending on partly cuing open figure;
Fig. 4 is the schematic diagram of a kind of embodiment of the utility model;
Fig. 5 is the schematic diagram of the another kind of embodiment of the utility model;
Parts, position and numbering in figure: main body 1, rotor 2, barrier 3, crackle mounting structure 4, stationary shaft 5, installation sheet 6, installation end 21.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figure 1, the utility model comprises main body 1 and rotor 2; Described main body 1 has the scale end face that anterior disk places end face and rear portion, described main body 1 is provided with and is through to from scale end face the mounting hole that end face placed by disk; Described rotor 2 has anterior installation end 21 and the operating side at rear portion, and described installation end 21 is provided with crackle mounting structure 4; Described rotor 2 is rotatably arranged in the mounting hole of main body 1, and the installation end 21 of rotor 2 and the disk of main body 1 to place end face corresponding, operating side is corresponding with scale end face.Epitrochanterian crackle mounting structure 4 mainly coordinates with the crackle in Brazilian disc, thus Brazilian disc is fixed.The Brazilian disc of experiment offers the spalttupfel of strip at center, simulating crack successively, the cooperation of crackle mounting structure 4 part is arranged on rotor 2, another part cooperation is arranged in the spalttupfel of Brazilian disc, namely utilize crackle mounting structure 4 through spalttupfel, thus fixing Brazilian disc, the embodiment of concrete visible presented hereinafter.
In use, the spalttupfel of Brazilian disc is arranged on crackle mounting structure 4, now Brazilian disc is fixed on the rotor 2 of this assistant experiment device, this assistant experiment device is now utilized to be placed on pressing machine by Brazilian disc, rotary rotor 2 can change the angle of spalttupfel in Brazilian disc, thus obtain the angle of crackle and the load wanted, then Brazilian disc is clamped in pressing machine pressure, pull down this assistant experiment device; Finally can test, fracture toughness computing formula is:
In formula: K
Ιfor opening mode stress intensity factor, K
Ι Ιfor shearing-type stress intensity factor, R is radius of specimen, and B is sample thickness, P
maxfor load during sample critical slope langth, 2a is precrack length, F
Ιand F
Ι Ιfor dimensionless pressure intensity factor, be the function (0.2≤a/R≤0.8) of a/R and angle of inclination beta, β is direction of check and loading angular direction angle.
In order to spacing rotor 2, as shown in Figure 3, described mounting hole is the shoulder hole that two ends diameter is large, mid diameter is little; It is stepped that described rotor 2 is also that two ends diameter is large, mid diameter is little, and the larger installation end 21 of rotor 2 diameter is dismountable.When installing rotor 2, removing installation end 21, rotor 2 being inserted in mounting hole, finally loading onto installation end 21, now just complete assembling; Otherwise can dismantle.Rotor 2 after installation can only rotate, can not axial translation again.
In order to better fix Brazilian disc, as shown in figures 1 and 3, the left and right sides that the disk of described main body 1 is placed on end face is arranged with two barriers 3 in parallel.Brazilian disc, when installing placement, utilizes two barriers 3 to be clamped, thus effectively can locate Brazilian disc.Article two, barrier 3 coordinates crackle mounting structure 4 to fix Brazilian disc.
Concrete, as shown in figures 1 and 3, described main body 1 is unsymmetric structure, and the distance on described mounting hole and main body 1 top is less than the distance of mounting hole and main body 1 bottom.Mounting hole, rotor 2 and Brazilian disc are coaxial after mounting, the main body 1 of this dissymmetrical structure can make the top of Brazilian disc expose the upper surface of main body 1, namely the top of Brazilian disc is higher than main body 1 top, and the bottom of Brazilian disc is concordant with the bottom of main body 1; Be placed into after on pressing machine at this assistant experiment device, pressing machine directly and the top contact of Brazilian disc, after pressing machine compresses Brazilian disc, can take out this assistant experiment device smoothly.
As a kind of embodiment of the present utility model, as shown in Figure 5, described crackle mounting structure 4 comprises: the strip hole of setting on rotor 2 installation end 21, the installation sheet 6 with strip hole form fit.Brazilian disc, containing the barrier 3 stretching out both sides, can be fixed by main body 1 preferably, avoids the rolling of Brazilian disc.The installation end of rotor 2 has the crackle strip hole corresponding with Brazilian disc, rotor 2 main shaft is by the stepped appearance mounting hole in main body 1, and be with the installation end 21 of identical strip hole to connect with one, screw, adhesions etc. all can, note two crackles alignment, make it be connected with main body 1, and realize rotor 2 and can rotate by opposing body 1.The advantage of this mode is installation sheet 6 is demountable, namely utilizes the installation of installation sheet 6 just can fix Brazilian disc.Installation sheet 6 the application small volume, be not easy to interfere with Brazilian disc when dismounting, namely Brazilian disc be fixed to pressing machine needs to pull down this assistant experiment device time, only need pull down installation sheet 6, can pull down whole assistant experiment device easily, the dismounting of independent installation sheet 6 is not easy the angle having influence on Brazilian disc.
As another kind of embodiment of the present utility model, as shown in Figure 4, described crackle mounting structure 4 is for being vertically set on two stationary shaft 5 on rotor 2 installation end 21; Two stationary shaft 5 symmetries are positioned at the both sides in installation end 21 center of circle, and diametrically same.When installing disk, two stationary shaft 5 are aimed at the two ends of the rectangular spalttupfel of disk respectively, penetrates, get final product fixed disc.The benefit of this mode is that the structure of whole assistant experiment device is comparatively simple, but needs the angle carefully avoiding interference Brazilian disc when taking out assistant experiment device on pressing machine.
In order to adjusting angle more accurately, as shown in Figure 2, the scale end face of described main body 1 is provided with scale, and the precision of scale is determined as the case may be, and the operating side of described rotor 2 is provided with pointer.The pointer of rotor 2 needs to move towards identical with the crackle mounting structure on rotor 2, namely pointer need be identical with crack orientation in Brazilian disc after installation, at this moment, namely the angle of crack orientation and load can be exchanged into the reading of pointer, the reading of pointer namely directly can be utilized to read angle, thus obtain the angle wanted accurately.
In order to avoid the angle Angulation changes of crack orientation and load, described rotor 2 is matched with mounting hole by damping structure.Damping structure can adopt coarse surface of contact to realize, or rotor 2 wringing fit is arranged in mounting hole, now, rotor 2 has the function of self-locking, get final product self-locking once the angle turning to needs, avoid again rotating, thus make the Brazilian disc flaw angle regulated can be good at keeping.
Claims (9)
1. centre burst Brazilian disc I, II and Mixed Mode Fracture assistant experiment device, is characterized in that: comprise main body (1) and rotor (2); Described main body (1) has the scale end face that anterior disk places end face and rear portion, described main body (1) is provided with and is through to from scale end face the mounting hole that end face placed by disk; Described rotor (2) has anterior installation end (21) and the operating side at rear portion, described installation end (21) is provided with crackle mounting structure (4); Described rotor (2) is rotatably arranged in the mounting hole of main body (1), and the installation end (21) of rotor (2) and the disk of main body (1) to place end face corresponding, operating side is corresponding with scale end face.
2. centre burst Brazilian disc I, II as claimed in claim 1 and Mixed Mode Fracture assistant experiment device, is characterized in that: described mounting hole is the shoulder hole that two ends diameter is large, mid diameter is little; It is stepped that described rotor (2) is also that two ends diameter is large, mid diameter is little, and the larger installation end (21) of rotor (2) diameter is dismountable.
3. centre burst Brazilian disc I, II as claimed in claim 1 and Mixed Mode Fracture assistant experiment device, is characterized in that: the left and right sides that the disk of described main body (1) is placed on end face is arranged with two barriers (3) in parallel.
4. centre burst Brazilian disc I, II as claimed in claim 3 and Mixed Mode Fracture assistant experiment device, it is characterized in that: described main body (1) is unsymmetric structure, the distance on described mounting hole and main body (1) top is less than the distance of mounting hole and main body (1) bottom.
5. centre burst Brazilian disc I, II as claimed in claim 1 and Mixed Mode Fracture assistant experiment device, is characterized in that: described crackle mounting structure (4) comprising: at the strip hole of the upper setting of rotor (2) installation end (21), the installation sheet (6) with strip hole form fit.
6. centre burst Brazilian disc I, II as claimed in claim 1 and Mixed Mode Fracture assistant experiment device, is characterized in that: described crackle mounting structure (4) is for being vertically set on two stationary shaft (5) on rotor (2) installation end (21); Two stationary shaft (5) symmetries are positioned at the both sides in installation end (21) center of circle, and diametrically same.
7. centre burst Brazilian disc I, II as claimed in claim 1 and Mixed Mode Fracture assistant experiment device, it is characterized in that: the scale end face of described main body (1) is provided with scale, the operating side of described rotor (2) is provided with pointer.
8. the centre burst Brazilian disc I, II as described in claim as arbitrary in claim 1 to 7 and Mixed Mode Fracture assistant experiment device, is characterized in that: described rotor (2) is matched with mounting hole by damping structure.
9. centre burst Brazilian disc I, II as claimed in claim 8 and Mixed Mode Fracture assistant experiment device, is characterized in that: described rotor (2) wringing fit is arranged in mounting hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520219593.0U CN204536106U (en) | 2015-04-13 | 2015-04-13 | Centre burst Brazilian disc I, II and Mixed Mode Fracture assistant experiment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520219593.0U CN204536106U (en) | 2015-04-13 | 2015-04-13 | Centre burst Brazilian disc I, II and Mixed Mode Fracture assistant experiment device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204536106U true CN204536106U (en) | 2015-08-05 |
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ID=53750093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520219593.0U Withdrawn - After Issue CN204536106U (en) | 2015-04-13 | 2015-04-13 | Centre burst Brazilian disc I, II and Mixed Mode Fracture assistant experiment device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204536106U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104764657A (en) * | 2015-04-13 | 2015-07-08 | 四川大学 | Center-cracked Brazilian discs I and II and combined fracture auxiliary experimental apparatus |
| CN107991186A (en) * | 2017-11-28 | 2018-05-04 | 西安科技大学 | The tensile strength test experimental rig of rocks containing crack and method |
-
2015
- 2015-04-13 CN CN201520219593.0U patent/CN204536106U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104764657A (en) * | 2015-04-13 | 2015-07-08 | 四川大学 | Center-cracked Brazilian discs I and II and combined fracture auxiliary experimental apparatus |
| CN104764657B (en) * | 2015-04-13 | 2017-09-29 | 四川大学 | Centre burst Brazilian disc I, II and Mixed Mode Fracture assistant experiment device |
| CN107991186A (en) * | 2017-11-28 | 2018-05-04 | 西安科技大学 | The tensile strength test experimental rig of rocks containing crack and method |
| CN107991186B (en) * | 2017-11-28 | 2024-01-26 | 西安科技大学 | Test device and method for testing tensile strength of rock containing cracks |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150805 Effective date of abandoning: 20170929 |
|
| AV01 | Patent right actively abandoned |