CN208283179U - A kind of vascular mechanics performance test fixture - Google Patents
A kind of vascular mechanics performance test fixture Download PDFInfo
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- CN208283179U CN208283179U CN201820999273.5U CN201820999273U CN208283179U CN 208283179 U CN208283179 U CN 208283179U CN 201820999273 U CN201820999273 U CN 201820999273U CN 208283179 U CN208283179 U CN 208283179U
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- clamping
- section
- supporting section
- inner core
- test fixture
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Abstract
The utility model belongs to new material testing field, is related to a kind of test fixture, and in particular to a kind of vascular mechanics performance test fixture, including clamping inner core, clamping inner core successively include gripping section, transition connection section and supporting section along its length；Gripping section cross section be it is rectangular, supporting section is cylindrical, and the axial direction of supporting section is consistent with length of inner core direction is clamped, and the cylindrical surface of supporting section gets on the bus and has screw thread；It clamps and is equipped with through-hole in the middle part of inner core along its length；Hooping device is arranged with outside supporting section, hooping device includes a pair of of clamping plate, semi-cylindrical recesses are respectively equipped on clamping plate, two clamping plate notch directions are opposite and are connected by fixed structure, the cylindrical hole that groove on two clamping plates encloses is threadedly engaged with supporting section cylindrical surface, the utility model is able to maintain the virgin state of stress of blood vessel during being uniaxially stretched, and obtains more accurately and effectively mechanics parameter.
Description
Technical field
The utility model belongs to new material testing field, is related to a kind of test fixture, and in particular to a kind of vascular mechanics
It can test fixture.
Background technique
In recent years, with the rapid development that nano material and artificial blood vessel study, about animal artery blood vessel biomethanics
Research be increasingly becoming research hotspot.The research is used not only for analysis blood circulation system physiological property, is painstaking effort
The clinical analysis of pipe disease provides significant data reference, can also provide for the finite element analysis of blood vessel and the building of constitutive relation
Necessary reference data.
Uniaxial tensile test is to study the most basic testing experiment of blood vessel biomechanics characteristic.About to arteries mechanics
The uniaxial tensile test of performance is usually all to be cut into planar strip using by tubular specimen, or peace is flattened at the both ends of sample
The mechanics parameter of blood vessel is obtained loaded on the method stretched in the flat collet of universal tensile machine, such clamp method not only cannot keep
The tube-like condition of blood vessel sample, and be easy to will cause the stress concentration for stretching sample at clamp port, so that sample is being drawn
Structure is generated during stretching to destroy, and finally influences the accuracy of test result.To obtain more accurate abundant be uniaxially stretched
Test data, it is necessary first to solution be exactly vascular grafts during the tensile test clamping problem, how to be uniaxially stretched
So that blood vessel is kept tubulose state in test is the problem that this field researcher faces.
Utility model content
Blood vessel power that is simple, being able to maintain blood vessel virgin state of stress that the purpose of the utility model is to provide a kind of structures
Learn performance test fixture.
To achieve the above object, the utility model takes following technical solution: a kind of vascular mechanics performance test fixture,
Including clamping inner core, clamping inner core successively includes gripping section, transition connection section and supporting section along its length；Gripping section cross section
To be rectangular, supporting section is cylindrical, and the axial direction of supporting section is consistent with clamping length of inner core direction, and the cylindrical surface of supporting section is got on the bus and had
Screw thread；It clamps and is equipped with through-hole in the middle part of inner core along its length；Hooping device is arranged with outside supporting section, hooping device includes a pair of of folder
Plate is respectively equipped with semi-cylindrical recesses on clamping plate, and two clamping plate notch directions are opposite and are connected by fixed structure, is located at two folders
The cylindrical hole that groove on plate encloses is threadedly engaged with supporting section cylindrical surface.
Further, the one end of supporting section far from transition connection section is hemispherical.
Further, supporting section is equipped with circular end face, the cylindrical surface of supporting section and circle far from one end of transition connection section
End face passes through outer rounded corner rounding off.
Further, clamping segment length L is 30~40mm, and width W is 15~25mm, and thickness d is 3~7mm, gripping section
Length/width face is rough surface.
Further, supporting section diameter is 3~20mm, and the diameter of through-hole is 1~5mm, supporting section far from gripping section one
The radius of the hemisphere at end is 1~4mm, and the diameter of groove is 4~22mm.
Further, fixture further includes that a replacement clamps inner core and rubber lining matched with replacement clamping inner core,
Replacement clamping core shape is consistent with clamping core shape but supporting section diameter is less than clamping Core support section diameter；Rubber lining
It is made of two semicircular cylinders, lining end is turned down outward in edge is fixed, positioned at the distance between fixing edge at lining both ends etc.
In the length that clamping plate is moved towards along groove.
Further, fixture further includes that multiple replacements clamp inner cores and rubber lining matched with replacement clamping inner core,
Each replacement clamping core shape is consistent with clamping core shape but supporting section diameter is less than clamping Core support section diameter；It is each to replace
Changing has gradient difference between the diameter of clamping Core support section；Rubber lining is made of two semicircular cylinders, and lining end is turned-out
Folding is equal to the length that clamping plate is moved towards along groove in edge is fixed, positioned at the distance between the fixing edge at lining both ends；With replacing for group
It changes clamping inner core and matched rubber lining is equipped with the same group echo of difference with other groups；The label of replacement clamping inner core
It is arranged on the length and width face of its gripping section, the label setting of rubber lining is in its fixing along upper.
Further, clamping plate is less than support segment length along the length that groove moves towards.
Further, fixed structure includes the connection for being arranged, extending vertically through two clamping plate faying faces along supporting section axisymmetrical
Hole, bolt passes through connecting hole and wing nut cooperates.
Further, rubber sheet gasket is equipped between wing nut and clamping plate, rubber sheet gasket is sheathed on bolt.
Further, it clamps inner core and clamping plate is engineering plastics material, bolt and wing nut are stainless steel material.
Compared with prior art, the utility model has the following beneficial effects:
1, supporting section and clamping plate interaction in the utility model, fixed test blood vessel sample, the setting of gripping section make to press from both sides
Holding inner core can directly be clamped by the flat collet of universal tensile testing machine；Pass through transition connection section between gripping section and supporting section
It is attached, improves the fastness of clamping inner core；The length/width face of gripping section is rough surface, makes the flat collet of universal tensile testing machine
It is more close with the clamping of gripping section, improve the stability of tension test.
2, the cylindrical structure of supporting section can make blood vessel sample keep tubular form during stretching, can obtain more
For accurate uniaxial tensile test data abundant；The one end of supporting section far from gripping section is hemispherical dome structure or does rounding to end face
Angle processing greatly improves the convenience in suit sample, and can effectively weaken blood vessel sample during stretching
The shearing of receiving, prevents test sample from occurring stress concentration phenomenon during stretching, so that sample generates during stretching
Structure is destroyed, and finally influences the accuracy of test result, improves the accuracy of test result.
3, hooping device and supporting section are closely connected using bolt and wing nut, keeps the blood vessel sample on supporting section solid
It is fixed more close, it improves during stretching, the stability of blood vessel sample improves the accuracy of test result；Supporting section and
Semi-cylindrical recesses be equipped with intermeshing screw thread, engaged by screw thread, can anti-hemostatic tube sample send out during stretching
It is raw to slide and fall off, improve the accuracy of test result；In being arranged blood vessel sample, by clamping inner core center along axis
The through-hole in direction is exhausted, and is arranged blood vessel sample and is more easier, and in drawing process, avoids due to being squeezed by internal gas
Blood vessel is caused to fall off from supporting section, internal pressure is consistent with external pressure, avoids the test data deviation being likely to occur.
4, the utility model structure is simple, easy to operate, and clamps inner core and clamping plate as ABS engineering plastics material, uses
3D printing technique can be applicable in the tension test of different-diameter vascular grafts with rapid processing.Bolt and wing nut are not
Rust steel material, pad is equipped with rubber sheet gasket between wing nut and clamping plate, and rubber sheet gasket is sheathed on bolt, prevents wing nut to folder
Plate generates impression.
5, the setting of replacement clamping inner core and rubber lining reduces so that a pair of of clamping plate can adapt to a variety of clamping inner cores
Experimental expenses improves the general applicability of the utility model, is provided on replacement clamping inner core and corresponding rubber lining same
Group echo improves the identity of replacement clamping inner core and rubber lining.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the left view of the utility model；
Fig. 3 is the A-A of Fig. 2 to sectional view；
Fig. 4 is the top view of the utility model middle clamp plate；
Fig. 5 is the main view of the utility model middle clamp plate；
Fig. 6 is the main view that inner core is clamped in the utility model；
Fig. 7 is the left view that inner core is clamped in the utility model；
Fig. 8 is the bottom view that inner core is clamped in the utility model；
Fig. 9 is the structural schematic diagram of replacement clamping inner core in the utility model；
Figure 10 is the structural schematic diagram of rubber lining in the utility model；
The electronic photo of Figure 11 the utility model progress uniaxial tensile test；
In figure: 1, clamping inner core, 2, clamping plate, 3, bolt, 4, wing nut, 5, through-hole, 6, connecting hole, 7, groove, 8, folder
Hold section, 9, supporting section, 10, rubber lining.
Specific embodiment
The present invention will be further described combined with specific embodiments below.
Embodiment 1
A kind of vascular mechanics performance test fixture, as shown in figures 1-8, including clamping inner core 1, inner core 1 is clamped along length side
To successively including gripping section 8, transition connection section and supporting section 9；8 cross section of gripping section be it is rectangular, 8 length L of gripping section be 35mm,
Width W is 20mm, and thickness d 6mm, the length/width face of gripping section 8 is rough surface；Supporting section 9 is cylindrical, and supporting section 9 is far from mistake
The one end for crossing linkage section is hemispherical, and the diameter of hemisphere is 3mm, and 9 diameter of supporting section is 15.66mmmm, the axial direction of supporting section 9 with
Clamping 1 length direction of inner core is consistent, and the cylindrical surface of supporting section 9 gets on the bus and has screw thread；It clamps 1 middle part of inner core and is equipped with along its length and lead to
Hole 5, the diameter of through-hole 5 are 4mm.
Hooping device is arranged with outside supporting section 9, hooping device includes a pair of of clamping plate 2, and being respectively equipped with diameter on clamping plate 2 is
The semi-cylindrical recesses 7 of 17.66mm, two clamping plates, 2 notch direction is opposite and is connected by fixed structure, is located on two clamping plates 2
The cylindrical hole that encloses of groove 7 be threadedly engaged with 9 cylindrical surface of supporting section；Clamping plate 2 is less than supporting section along the length that groove 7 moves towards
9 length, supporting section 9 are equipped with colour circle groove close to one end of transition connection section, and vessel end set to scribe line position slides
It is more easily observed；Fixed structure includes the connecting hole for being arranged, extending vertically through two clamping plates, 2 faying face along 9 axisymmetrical of supporting section
6, bolt 3 passes through connecting hole 6 and wing nut 4 cooperates, and rubber sheet gasket, rubber sheet gasket set are equipped between wing nut 4 and clamping plate 2
On bolt 3；It clamps inner core 1 and clamping plate 2 is ABS engineering plastics material, bolt 3 and wing nut 4 are stainless steel material.
The uniaxial tensile test of heart aorta vessel sample is carried out using above-mentioned fixture, as shown in figure 11, including process
It is as follows:
(1) sample is installed: the upper and lower side of heart aorta vessel sample is respectively sleeved to the support of a pair of of clamping inner core 1
In section 9, then blood vessel is clamped using clamping plate 2.
(2) fixed sample: the screw thread of screw thread and 7 surface of groove on supporting section 9 is intermeshed, bolt 3 is inserted into and is connected
Hole 6 is connect, rubber mat plate is sheathed on bolt 3, tightens bolt 3 using wing nut 4, makes the fixed heart aortic blood of clamping plate 2
Pipe sample.
(3) gripping section 8 of a pair of of clamping inner core 1 uniaxial tensile test: is clamped in the flat folder of universal tensile testing machine respectively
In head, start uniaxial tensile test.
Uniaxial tensile test is carried out using fixture provided by the utility model, blood vessel own form can be studied to its mechanics
The influence of performance, and can obtain with the more similar mechanics parameter of real blood vessels, provided for the clinical analysis of cardiovascular disease
More accurate data reference, also provides necessary parameter assignment for the finite element analysis of blood vessel and the building of constitutive relation.
Embodiment 2
A kind of vascular mechanics performance test fixture, structure is same as Example 1, the difference is that: the diameter of through-hole 5 is
1.5mm；Length and width, the thickness of gripping section 8 are respectively 30mm, 18mm, 3mm, and the diameter of supporting section 9 is 3mm, and supporting section is far from folder
The radius for holding the hemisphere of one end of section is 1mm, and the diameter of groove 7 is 4mm.
Embodiment 3
A kind of vascular mechanics performance test fixture, structure difference from Example 1 are: supporting section 9 connects far from transition
The one end for connecing section is equipped with circular end face, and the cylindrical surface of supporting section 9 and circular end face pass through outer rounded corner rounding off.
Embodiment 4
A kind of vascular mechanics performance test fixture, structure is same as Example 1, the difference is that: fixture further includes one
A replacement clamping inner core and rubber lining matched with replacement clamping inner core, replacement clamping core shape and clamping 1 shape of inner core
Shape is consistent but 9 diameter of supporting section is less than clamping 1 supporting section of inner core, 9 diameter；Rubber lining is made of two semicircular cylinders, lining end
Outside fold is equal to the length that clamping plate 2 is moved towards along groove 7 in edge is fixed, positioned at the distance between the fixing edge at lining both ends.
Embodiment 5
A kind of vascular mechanics performance test fixture, structure is same as Example 1, and as shown in Figure 9 and Figure 10, difference exists
In: fixture further includes multiple replacement clamping inner cores and rubber lining 10 matched with replacement clamping inner core, respectively in replacement clamping
Core shape is consistent with clamping 1 shape of inner core but 9 diameter of supporting section is less than clamping 1 supporting section of inner core, 9 diameter；In each replacement clamping
There is gradient difference between the diameter of core supporting section 9；Rubber lining 10 is made of two semicircular cylinders, and lining end is turned down outward in card
Gu edge is equal to the length that clamping plate 2 is moved towards along groove 7 positioned at the distance between the fixing edge at lining both ends；With the replacement folder of group
It holds inner core and matched rubber lining 10 is equipped with the same group echo of difference with other groups；The label of replacement clamping inner core is set
It sets on the length and width face of its gripping section 8, the label setting of rubber lining 10 is in its fixing along upper.
Claims (10)
1. a kind of vascular mechanics performance test fixture, it is characterised in that: including clamping inner core, clamp inner core along its length successively
Including gripping section, transition connection section and supporting section；The gripping section cross section be it is rectangular, supporting section is cylindrical, supporting section
Axial consistent with clamping length of inner core direction, the cylindrical surface of supporting section gets on the bus and has screw thread；Along length side in the middle part of the clamping inner core
To equipped with through-hole；Hooping device is arranged with outside the supporting section, hooping device includes a pair of of clamping plate, is respectively equipped with semicircle on clamping plate
Cylindrical groove, two clamping plate notch directions are opposite and are connected by fixed structure, the circle that the groove on two clamping plates encloses
Post holes is threadedly engaged with supporting section cylindrical surface.
2. vascular mechanics performance test fixture as described in claim 1, it is characterised in that: the supporting section is connected far from transition
One end of section is hemispherical.
3. vascular mechanics performance test fixture as described in claim 1, it is characterised in that: the supporting section is connected far from transition
One end of section is equipped with circular end face, and the cylindrical surface of supporting section and circular end face pass through outer rounded corner rounding off.
4. vascular mechanics performance test fixture a method according to any one of claims 1-3, it is characterised in that: the clamping segment length L
It is 15~25mm for 30~40mm, width W, thickness d is 3~7mm, and the length/width face of gripping section is rough surface.
5. vascular mechanics performance test fixture as claimed in claim 4, it is characterised in that: the supporting section diameter be 3~
20mm。
6. vascular mechanics performance test fixture as claimed in claim 5, it is characterised in that: the fixture further includes a replacement
Clamp inner core and with the matched rubber lining of replacement clamping inner core, replacement clamping core shape it is consistent with core shape is clamped but
Supporting section diameter is less than clamping Core support section diameter；The rubber lining is made of two semicircular cylinders, and lining end is turned-out
Folding is equal to the length that clamping plate is moved towards along groove in edge is fixed, positioned at the distance between the fixing edge at lining both ends.
7. vascular mechanics performance test fixture as claimed in claim 5, it is characterised in that: the fixture further includes multiple replacements
Inner core and rubber lining matched with replacement clamping inner core are clamped, each replacement clamping core shape is consistent with clamping core shape
But supporting section diameter is less than clamping Core support section diameter；There is ladder between the diameter of each replacement clamping Core support section
It is poor to spend；The rubber lining is made of two semicircular cylinders, and lining end is turned down outward in fixing edge, the card positioned at lining both ends
Gu the distance between edge is equal to the length that clamping plate is moved towards along groove；With the replacement clamping inner core of group and matched rubber lining
It is equipped with the same group echo for being different from other groups；The label of the replacement clamping inner core is arranged on the length and width face of its gripping section,
The label setting of rubber lining is in its fixing along upper.
8. the vascular mechanics performance test fixture as described in claims 1 or 2 or 3 or 5 or 6 or 7, it is characterised in that: the branch
The both ends of support section are stretched out outside clamping plate.
9. vascular mechanics performance test fixture as claimed in claim 8, it is characterised in that: the fixed structure includes along support
The setting of section axisymmetrical, the connecting hole for extending vertically through two clamping plate faying faces, bolt passes through connecting hole and wing nut cooperates.
10. vascular mechanics performance test fixture as claimed in claim 9, it is characterised in that: the wing nut and clamping plate it
Between be equipped with rubber sheet gasket, rubber sheet gasket is sheathed on bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820999273.5U CN208283179U (en) | 2018-06-27 | 2018-06-27 | A kind of vascular mechanics performance test fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820999273.5U CN208283179U (en) | 2018-06-27 | 2018-06-27 | A kind of vascular mechanics performance test fixture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208283179U true CN208283179U (en) | 2018-12-25 |
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ID=64704781
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820999273.5U Expired - Fee Related CN208283179U (en) | 2018-06-27 | 2018-06-27 | A kind of vascular mechanics performance test fixture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208283179U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111351709A (en) * | 2020-03-12 | 2020-06-30 | 河北瑞志交通技术咨询有限公司 | Auxiliary device for detecting overall tensile property of silicon core pipe and detection method |
| WO2020173508A1 (en) * | 2019-02-27 | 2020-09-03 | 北京市理化分析测试中心 | Carbon fibre bundle sample preparation apparatus, and preparation method for carbon fibre bundle |
-
2018
- 2018-06-27 CN CN201820999273.5U patent/CN208283179U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020173508A1 (en) * | 2019-02-27 | 2020-09-03 | 北京市理化分析测试中心 | Carbon fibre bundle sample preparation apparatus, and preparation method for carbon fibre bundle |
| CN111351709A (en) * | 2020-03-12 | 2020-06-30 | 河北瑞志交通技术咨询有限公司 | Auxiliary device for detecting overall tensile property of silicon core pipe and detection method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181225 Termination date: 20210627 |
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| CF01 | Termination of patent right due to non-payment of annual fee |