CN110296903A - Special-shaped bone plate Mechanics Performance Testing harness and test method - Google Patents
Special-shaped bone plate Mechanics Performance Testing harness and test method Download PDFInfo
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- CN110296903A CN110296903A CN201910643078.8A CN201910643078A CN110296903A CN 110296903 A CN110296903 A CN 110296903A CN 201910643078 A CN201910643078 A CN 201910643078A CN 110296903 A CN110296903 A CN 110296903A
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- 210000000988 bone and bone Anatomy 0.000 title claims abstract description 124
- 238000012360 testing method Methods 0.000 title claims abstract description 86
- 238000010998 test method Methods 0.000 title abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 20
- 230000003068 static effect Effects 0.000 claims abstract description 17
- 238000006073 displacement reaction Methods 0.000 claims description 14
- 238000005452 bending Methods 0.000 claims description 13
- 125000004122 cyclic group Chemical group 0.000 claims description 12
- 230000002159 abnormal effect Effects 0.000 claims 6
- 238000001514 detection method Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 241000233855 Orchidaceae Species 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000011664 nicotinic acid Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0005—Repeated or cyclic
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0023—Bending
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0075—Strain-stress relations or elastic constants
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0278—Thin specimens
- G01N2203/0282—Two dimensional, e.g. tapes, webs, sheets, strips, disks or membranes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
Abstract
The invention discloses a kind of special-shaped bone plate Mechanics Performance Testing harness and test methods, belong to medical instrument detection technique field, the test harness includes the fixing seat being used cooperatively, briquetting and pressure head, multiple mounting holes for installing detected bone plate are provided on the side wall of the fixing seat, various forms of special-shaped bones plate can be met, the briquetting is mounted on the side of detected bone plate end to transmit loading force to detected bone plate, and the pressure head is arranged in the top of briquetting and during the test to briquetting applied force.The method that the test method carries out static mechanical property test and dynamic fatigue Mechanics Performance Testing to special-shaped bone plate including the use of above-mentioned test harness.The exemplary technical solution of the present invention carries out science, accurate detection for the mechanical property of special-shaped bone plate, has filled up the blank of special-shaped bone plate Mechanics Performance Testing Special test instrument and test method, examines field to have great importance medical instrument.
Description
Technical field
The invention belongs to medical instrument inspection technology field, specifically a kind of special-shaped bone plate Mechanics Performance Testing dress
Tool and test method, the test suitable for special-shaped bone plate mechanical property.
Background technique
Bone plate is state key supervision high risk medical instrument, is the shape according to skeleton, according to Bionic Design
Made of fix device, commonly used to treat the orthopaedic disease for needing fixation for treatment caused by a variety of causes.Before it comes into operation
Quality inspection it is extremely important, it is closely related with the physical rehabilitation situation of patient.Clinical suspicious Medical devices adverse event is main
Show as Plate break, bending, loosening etc..
Therefore, the mechanical properties such as fatigue strength of bone plate can generate the service performance of bone plate important influence,
To guarantee that reliability that bone plate uses, mechanical property need to carry out stringent detection.
Bone plate includes the vertical bar shape bone plate and special-shaped bone plate in irregular shape of regular shape, special-shaped bone plate master
It is used for the fixation of the positions such as joint bone, at present for the bone plate of vertical bar shape, relevant professional standard to define its mechanics
The test method of performance, still, in the prior art there are no the test method of the mechanical property for special-shaped bone plate and accordingly
Test harness.
In conclusion a kind of harness and method that the mechanical property for being directed to special-shaped bone plate is tested is designed, so as to
In the mechanical property to special-shaped bone plate carries out scientific accurate detection, is current urgent need to resolve the problem of.
Summary of the invention
In order to solve above-mentioned deficiency in the prior art, the purpose of the present invention is to provide a kind of special-shaped bone plate mechanical property
Energy test harness and test method, to realize science, the accurate detection of the mechanical property for special-shaped bone plate.
The technical solution adopted by the present invention to solve the technical problems are as follows:
On the one hand, provide a kind of special-shaped bone plate Mechanics Performance Testing harness, including be used cooperatively fixing seat, briquetting
And pressure head, be provided with the mounting hole for installing detected bone plate on the side wall of the fixing seat, the briquetting be mounted on by
Detect bone plate end side to detected bone plate transmit loading force, the pressure head be arranged in the top of briquetting and
Apply loading force to briquetting in test process.
Further, the mounting hole is provided with multiple, and multiple mounting holes are longitudinal arranged side by side on the side wall of fixing seat
Arrangement.
Further, the fixing seat is in hollow cylindrical shape, and the bottom end of fixing seat is provided with mounting flange.
Further, the side that the briquetting is connected with detected bone plate is set as compatible with detected bone plate
Arcwall face.
Further, remaining side of the briquetting is plane.
Further, the pressure head is in flat.
On the other hand, static mechanical survey is carried out to special-shaped bone plate using above-mentioned test harness the present invention also provides a kind of
The method of examination, comprising:
Pressure head is installed on testing machine；
Briquetting is installed in one end that detected bone plate has arc-shaped bend, and the other end for being detected bone plate is installed on
The appropriate location of fixing seat, fixing seat are installed on the testing stand of testing machine；
Testing machine starting, pressure head applies plus load to briquetting until detected bone plate or attachment screw are destroyed；
Obtain the static buckling intensity for being detected bone plate.
Further,
When rigidity is bent in test, pressure head is applied plus load to briquetting and is gradually increased with the control rate of 10mm/min；
When intensity is bent in test, briquetting generates the moment of flexure of 0.2% Departure displacement, and 0.2% Departure displacement q passes through following formula
It calculates:
Q=0.002*L,
In formula: the L=arm of force；
If being detected bone plate to be broken before reaching specified loads, moment of flexure when being broken is to bend intensity；
Otherwise, it is obtained bending intensity according to the yield load of detected bone plate and the arm of force.
On the other hand, dynamic fatigue power is carried out to special-shaped bone plate using above-mentioned test harness the present invention also provides a kind of
The method for learning test, comprising:
Pressure head is installed on tension-torsion fatigue tester；
Briquetting is installed in one end that detected bone plate has arc-shaped bend, and the other end for being detected bone plate is installed on
The appropriate location of fixing seat, fixing seat are installed on the testing stand of tension-torsion fatigue tester；
Pressure head applies initiated failure load to briquetting and carries out fatigue and cyclic, continues when preset test stops at least
106Cycle period；
Obtain the fatigue life for being detected bone plate and fatigue strength.
Further, the initiated failure load is successively set as detected bone plate and damages the 75% of power, 50% and by pressure
25%；
And/or
Measure the maximum difference between the load level of fatigue strength is no more than detected bone plate bending strength 10%；
And/or
Test frequency is 5Hz；
And/or
The stress ratio of minimum load and maximum load is 0.1.
Compared with prior art, the invention has the benefit that
1, the exemplary test harness of the present invention and test method are directed to the test that special-shaped bone plate carries out mechanical property,
The blank for having filled up special-shaped bone plate Mechanics Performance Testing Special test instrument and test method examines field for medical instrument
Have great importance.
2, the exemplary test harness of the present invention, mounting hole are longitudinally set side by side with multiple on the side wall of fixing seat, are applicable in
It is applied widely in the bone plate for installing a variety of different models.
3, the exemplary test harness of the present invention, fixing seat are in hollow cylindrical shape, and the bottom end of fixing seat is provided with Method for Installation
Orchid mitigates the quality of harness, reduces the consumptive material of harness, while convenient for the operation such as pick-and-place, installation of harness.
4, the exemplary test harness of the present invention, the side that briquetting is connected with detected bone plate is set as and detected synthetism
The compatible arcwall face of plate, the suitability of the two is more preferable, conducive to the accuracy for guaranteeing test result.
5, the exemplary test method of the present invention, design rationally, have the theoretical basis of science, and test result is accurate and reliable.
Detailed description of the invention
By reading a detailed description of non-restrictive embodiments in the light of the attached drawings below, the application's is other
Feature, objects and advantages will become more apparent upon:
Fig. 1 is the structural schematic diagram after the assembling of test harness of the embodiment of the present invention；
Fig. 2 is the structural schematic diagram of the pressure head of test harness of the embodiment of the present invention；
Fig. 3 is the structural schematic diagram of the fixing seat of test harness of the embodiment of the present invention；
Fig. 4 is the schematic cross-sectional view of the fixing seat cylindrical portions of test harness of the embodiment of the present invention；
Fig. 5 is the bottom view of Fig. 4；
Fig. 6 is the structural schematic diagram after briquetting of the embodiment of the present invention and the assembling of detected bone plate；
Fig. 7 is the power displacement curve figure in test process of the embodiment of the present invention.
In figure: 1 fixing seat, 11 mounting holes, 12 screw holes, 2 briquettings, 3 pressure heads, 4 detected bones plate, 41 fixation holes.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is a part of the embodiment of the present invention, instead of all the embodiments.
The component for the embodiment of the present invention for usually describing and showing in attached drawing here can be with a variety of different configurations
To arrange and design.Therefore, the detailed description of the embodiment of the present invention provided in the accompanying drawings is not intended to limit below and is wanted
The scope of the present invention of protection is sought, but is merely representative of selected embodiment of the invention.
Based on the embodiments of the present invention, those of ordinary skill in the art are obtained without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to
Convenient for description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation,
It is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.In addition, term " first ", " second ",
" third " is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.It also should be noted that illustrating only part relevant to invention for ease of description, in attached drawing.
As shown in Figure 1, An embodiment provides a kind of special-shaped bone plate Mechanics Performance Testing harness, including
Fixing seat 1, briquetting 2 and the pressure head 3 being used cooperatively are provided with for installing detected bone plate 4 on the side wall of the fixing seat 1
Mounting hole 11, the briquetting 2 is mounted on the side of detected 4 end of bone plate and loads to transmit to detected bone plate 4
Power, the pressure head 3 are arranged in the top of briquetting 2 and apply loading force to briquetting 2 during the test.
As shown in figure 3, the mounting hole 11 be provided with it is multiple, multiple mounting holes 11 on the side wall of fixing seat 1 indulge
To laid out in parallel.Multiple mounting holes 11 are suitable for installing the bone plate of a variety of different models, applied widely, the mounting hole 11
For screw hole, fastening screw specifically can be used when installation, detected bone plate 4 is mounted in fixing seat 1.
Fixing seat 1 is in hollow cylindrical shape, and the bottom end of fixing seat 1 is provided with for fixing seat 1 to be mounted on testing stand
Mounting flange.As shown in Figure 4, Figure 5, can also be arranged in the bottom end of 1 side wall of fixing seat for installing fixing seat 1 with other
The screw hole 12 that part is connected.This kind of structure type can mitigate the quality of harness, reduce the consumptive material of harness, while convenient for harness
The operations such as pick-and-place, installation.
As shown in fig. 6, the side that briquetting 2 is connected with detected bone plate 4 is set as compatible with detected bone plate 4
Remaining side of arcwall face, briquetting 2 is plane.This kind of structure type makes the suitability of briquetting 2 and detected bone plate 4 more
Good, more acurrate to the transmitting of active force, the briquetting 2 of the present embodiment is using the polyurethane block for meeting ASTMF1839.
As shown in Fig. 2, the pressure head 3 of the present embodiment is in flat, the longitudinal load as shown in Figure 1 of pressure head 3 when being tested
On briquetting 2, prevent from generating stress concentration when load on briquetting 2.
The method for carrying out static mechanical test to special-shaped bone plate using the test harness of the present embodiment is as follows:
Pressure head 3 is installed on testing machine；
Briquetting 2 is installed in one end that detected bone plate 4 has arc-shaped bend, is detected the other end peace of bone plate 4
Appropriate location loaded on fixing seat 1, fixing seat 1 are installed on the testing stand of testing machine；Specifically, briquetting 2 connects with detected
Connector between bone plate 4, between detected bone plate 4 and fixing seat 1 can use screw；
Testing machine starting, pressure head 3 applies plus load to briquetting 2 until detected bone plate 4 or attachment screw are destroyed；
Obtain the static buckling intensity for being detected bone plate 4.
Specifically, pressure head is applied plus load to briquetting and is gradually increased with the control rate of 10mm/min when rigidity is bent in test
Greatly, power displacement curve is as shown in fig. 7, the greatest gradient (N/m) of linear elastic region is to bend rigidity on power displacement curve.
When intensity is bent in test, briquetting is set to generate the moment of flexure of 0.2% Departure displacement, under 0.2% Departure displacement q passes through
Formula calculates:
Q=0.002*L,
In formula: the L=arm of force；
If being detected bone plate to be broken before reaching specified loads, moment of flexure when being broken is to bend intensity；
Otherwise, it is obtained bending intensity according to the yield load of detected bone plate and the arm of force, specific as follows:
If being detected bone plate rupture before power displacement curve intersects with offset linear BC, it is rigid to calculate press-bending by following formula
Degree:
Rigidity=Fmax*L is bent,
In formula: Fmax=damages power by pressure；The L=arm of force.
Otherwise, it as shown in fig. 7, on power displacement curve figure, from initial (linear) a part of load displacement curve, draws
One best-fit straight line OM calculates the press-bending rigidity of angle fixer by calculating the slope of straight line OM, specific:
On force displacement diagram, drawing OB makes OB be equal to q, then draws straight line BC and is parallel to OM, draws power displacement curve and straight
The intersection point of line BC is yield load.
The press-bending intensity for being detected bone plate is calculated according to the following formula:
Rigidity=P*L is bent,
In formula: P=yield load；The L=arm of force.
The method for carrying out dynamic fatigue mechanical test to special-shaped bone plate using the test harness of the present embodiment is as follows:
Pressure head 3 is installed on tension-torsion fatigue tester；
Briquetting 2 is installed in one end that detected bone plate 4 has arc-shaped bend, is detected the other end peace of bone plate 4
Appropriate location loaded on fixing seat 1, fixing seat 1 are installed on the testing stand of tension-torsion fatigue tester；Specific connection type can
It is identical when with progress static mechanical test；
Pressure head 3 applies initiated failure load to briquetting 2 and carries out fatigue and cyclic, continues when preset test stops
106Cycle period or more multicycle；Counter can be accessed on testing machine to record fatigue life cycle；
In the case where lacking experience, the 75% of the bone plate bending strength of measurement is tested according to static mechanical property,
50% and 25% corresponding load is as initiated failure load.Meanwhile measuring the maximum difference between the load level of fatigue strength
No more than the 10% of the bending strength of static buckling test measurement.The method that can be used for measuring bone plate fatigue strength includes rising
Drop method and amendment lifting and lowering method, obtain the fatigue life for being detected bone plate and fatigue strength.
For being detected the loading force of static maximum deflection intensity of bone plate and be 1000N, to measurement bone plate fatigue
The lifting and lowering method and amendment lifting and lowering method of intensity are described as follows:
Setting the 75% of the loading force of static maximum deflection intensity first is initiated failure load, for the present embodiment i.e.
Fatigue and cyclic is carried out to set the initiated failure load of 750N, after the circulation setting period, if detected bone plate is still intact,
Increase certain load and carry out fatigue and cyclic again, the maximum difference between the load level of said determination fatigue strength is no more than
The 10% of the bending strength of static buckling test measurement, that is increased load is curved no more than static buckling test measurement
The 10% of Qu Qiangdu, specific in the present embodiment, 10% of increased fatigue load no more than 1000N, that is, cannot surpass
100N is crossed, is illustrated for increasing by 10% load every time, after the completion of 75% initiated failure load fatigue circulation, if tested
Survey bone plate it is still intact if, then apply 85% fatigue load carry out fatigue and cyclic, after the period for recycling setting, observation
Whether detected bone plate is damaged, if still intact if continue growing at most 10%, until be detected bone plate broken
It is bad.
Under normal circumstances, after 75% initiated failure load cycle setting period, most detected bone plate can quilt
It destroys, at this point, the initiated failure load of usually reselection 50% carries out fatigue and cyclic, still referring to above-mentioned steps, if 50%
Initiated failure load cycle after the completion of, be detected bone plate it is intact if, then increase by 10% i.e. apply 60% fatigue load
Fatigue and cyclic is carried out again, after the period for recycling setting, is observed and is detected whether bone plate is damaged, if if still intact
At most 10% is then continued growing, is destroyed until being detected bone plate.
If detected bone plate is destroyed, at this point, usual reselection after 50% initiated failure load cycle setting period
25% initiated failure load carries out fatigue and cyclic, still referring to above-mentioned steps, if 25% initiated failure load cycle is complete
Cheng Hou, if detected bone plate is intact, then the fatigue load for increasing by 10% i.e. application 35% carries out fatigue and cyclic again, recycles
After the period of setting, observe be detected bone plate whether be damaged, if still intact if continue growing at most 10%, directly
It is destroyed to bone plate is detected.
During the test that fatigue load is incremented by, if after the completion of some fatigue and cyclic period, being detected bone plate and being broken
It is bad, then obtained according to the maximum fatigue load value not being destroyed in its previous circulation be detected bone plate fatigue life and
Fatigue strength.
If being detected the case where bone plate is destroyed after applying the initiated failure load cycle setting period, reduce initial
Remained intact after being tested again after fatigue load, when fatigue load increase to be destroyed with detected bone plate it is initial
When the difference of fatigue load tests the 10% of the bending strength measured no more than static buckling, if being detected bone plate in fatigue
Be not destroyed after circulation, then with the fatigue load in the fatigue and cyclic period come fatigue life for determining detected bone plate and
Fatigue strength, it is not necessary to be further continued for increasing fatigue load.
For the present invention when implementing, the selection of above-mentioned initiated failure load is not limited to numerical value described in embodiment, can also be with
Other numerical value are selected according to the actual situation.
Above description is only the preferred embodiment of the application and the explanation to institute's application technology principle.Those skilled in the art
Member is it should be appreciated that invention scope involved in the application, however it is not limited to technology made of the specific combination of above-mentioned technical characteristic
Scheme, while should also cover in the case where not departing from the inventive concept, it is carried out by above-mentioned technical characteristic or its equivalent feature
Any combination and the other technical solutions formed.Such as features described above has similar function with (but being not limited to) disclosed herein
Can technical characteristic replaced mutually and the technical solution that is formed.
Except for the technical features described in the specification, remaining technical characteristic is the known technology of those skilled in the art, is prominent
Innovative characteristics of the invention out, details are not described herein for remaining technical characteristic.
Claims (10)
1. a kind of abnormal shape bone plate Mechanics Performance Testing harness, which is characterized in that including fixing seat, briquetting and the pressure being used cooperatively
Head is provided with the mounting hole for installing detected bone plate on the side wall of the fixing seat, and the briquetting is mounted on detected
To transmit loading force to detected bone plate, the pressure head is arranged in the top of briquetting and is testing for the side of bone plate end
Apply loading force to briquetting in the process.
2. abnormal shape bone plate Mechanics Performance Testing harness according to claim 1, which is characterized in that the mounting hole setting
There is multiple, multiple mounting holes longitudinal laid out in parallel on the side wall of fixing seat.
3. abnormal shape bone plate Mechanics Performance Testing harness according to claim 1, which is characterized in that during the fixing seat is in
Empty cylindrical shape, the bottom end of fixing seat is provided with mounting flange.
4. abnormal shape bone plate Mechanics Performance Testing harness according to claim 1, which is characterized in that the briquetting and tested
It surveys the connected side of bone plate and is set as arcwall face compatible with detected bone plate.
5. abnormal shape bone plate Mechanics Performance Testing harness according to claim 4, which is characterized in that remaining of the briquetting
Side is plane.
6. abnormal shape bone plate Mechanics Performance Testing harness according to claim 1, which is characterized in that the pressure head is in flat
Shape.
7. a kind of side for carrying out static mechanical test to special-shaped bone plate using any test harness of claim 1-6
Method characterized by comprising
Pressure head is installed on testing machine；
Briquetting is installed in one end that detected bone plate has arc-shaped bend, and the other end for being detected bone plate is installed on fixation
The appropriate location of seat, fixing seat are installed on the testing stand of testing machine；
Testing machine starting, pressure head applies load to briquetting until detected bone plate or attachment screw are destroyed；
Obtain the static buckling intensity for being detected bone plate.
8. the method according to claim 7 for carrying out static mechanical test to special-shaped bone plate, which is characterized in that
When rigidity is bent in test, pressure head is applied load to briquetting and is gradually increased with the control rate of 10mm/min；
When intensity is bent in test, briquetting generates the moment of flexure of 0.2% Departure displacement, and 0.2% Departure displacement q passes through following formula meter
It calculates:
Q=0.002*L,
In formula: the L=arm of force；
If being detected bone plate to be broken before reaching specified loads, moment of flexure when being broken is to bend intensity；Otherwise,
It is obtained bending intensity according to the yield load of detected bone plate and the arm of force.
9. a kind of carry out dynamic fatigue mechanical test to special-shaped bone plate using any test harness of claim 1-6
Method characterized by comprising
Pressure head is installed on tension-torsion fatigue tester；
Briquetting is installed in one end that detected bone plate has arc-shaped bend, and the other end for being detected bone plate is installed on fixation
The appropriate location of seat, fixing seat are installed on the testing stand of tension-torsion fatigue tester；
Pressure head applies initiated failure load to briquetting and carries out fatigue and cyclic, continues at least 10 when preset test stops6It follows
The ring period；
Obtain the fatigue life for being detected bone plate and fatigue strength.
10. the method according to claim 9 for carrying out dynamic fatigue mechanical test to special-shaped bone plate, which is characterized in that
The initiated failure load is successively set as being detected 75%, 50% and the 25% of bone plate static state maximum deflection intensity；
And/or
Measure the maximum difference between the load level of fatigue strength is no more than detected bone plate bending strength 10%；
And/or
Test frequency is 5Hz；
And/or
The stress ratio of minimum load and maximum load is 0.1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910643078.8A CN110296903A (en) | 2019-07-17 | 2019-07-17 | Special-shaped bone plate Mechanics Performance Testing harness and test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910643078.8A CN110296903A (en) | 2019-07-17 | 2019-07-17 | Special-shaped bone plate Mechanics Performance Testing harness and test method |
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|---|---|
| CN110296903A true CN110296903A (en) | 2019-10-01 |
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ID=68031283
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|---|---|---|---|
| CN201910643078.8A Pending CN110296903A (en) | 2019-07-17 | 2019-07-17 | Special-shaped bone plate Mechanics Performance Testing harness and test method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112697416A (en) * | 2020-12-23 | 2021-04-23 | 德检(江苏)检测技术有限公司 | Method for testing structure stability of universal screw and bone plate |
| CN116399716A (en) * | 2023-06-09 | 2023-07-07 | 江苏嘉斯康医疗科技有限公司 | Press for bone fracture plate test |
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| CN116399716A (en) * | 2023-06-09 | 2023-07-07 | 江苏嘉斯康医疗科技有限公司 | Press for bone fracture plate test |
| CN116399716B (en) * | 2023-06-09 | 2023-08-22 | 江苏嘉斯康医疗科技有限公司 | Press for bone fracture plate test |
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