CN106092792A - A kind of physiological environment analog being applied to ultrasonic accelerated fatigue test - Google Patents
A kind of physiological environment analog being applied to ultrasonic accelerated fatigue test Download PDFInfo
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- CN106092792A CN106092792A CN201610580048.3A CN201610580048A CN106092792A CN 106092792 A CN106092792 A CN 106092792A CN 201610580048 A CN201610580048 A CN 201610580048A CN 106092792 A CN106092792 A CN 106092792A
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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
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
- G01N3/34—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by mechanical means, e.g. hammer blows
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
- G01N17/006—Investigating resistance of materials to the weather, to corrosion, or to light of metals
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- 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
- G01N2203/0073—Fatigue
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Abstract
The invention discloses a kind of physiological environment analog being applied to ultrasonic accelerated fatigue test, the environment pipe of simulated body fluid it is full of including horn and inside, described horn one end is placed in environment pipe, wherein, one end that horn is placed in environment pipe connects part to be measured, and the other end can be connected with ultrasonic accelerated fatigue test device.This device is by simulation human physiological environment, it is possible to accurately test out metal implant material Fatigue Life in Very High Cycle in human body environment.
Description
Technical field
The invention belongs to fatigue rig field, relate to a kind of ultrasonic accelerated fatigue test equipment, be related specifically to
A kind of physiological environment analog being applied to ultrasonic accelerated fatigue test.
Background technology
Metal implant stays in the body for a long time the most throughout one's life, human body when carrying out normal physiological activity, metal implant
Mechanical behavior inherently dynamic, and the pulsating stress effect of higher cycle can be experienced, such as hip joint is wanted every year
Experience about 3.5 × 106Secondary pulsating stress, heart to beat about 4 × 10 every year7Secondary, tooth implant to bear about 1 × 10 every year7
Secondary Cyclic Load.It addition, implant is in physiological environment, by the chemical attack of human body fluid, cause corrosion fatigue.
The common effect of chemical attack and circulation machinery load is the main cause causing and implanting prosthese early fracture.Therefore, it is thus achieved that gold
Genus embedded material Fatigue Life in Very High Cycle under physiological environment can be the design of embedded material and guarantees the reliable of embedded material
Property, safety and to being estimated in implant under arms physiological environment and biometry provides favourable scientific basis and pass
Key technology is supported.
The most conventional loading frequency for the fatigue test system of biomaterial test is below 100Hz, realize
108Super high cycle fatigue test more than cycle, according to traditional 20Hz electo hydraulic servocontrolled fatigue testing machine, tests 1 sample big
About need 2 months, and use supersonic vibration accelerated fatigue test device, then have only to 1.4 hours, experiment can be greatly shortened
In the cycle, reduce experimental cost.
Existing supersonic vibration accelerated fatigue test device can only test metal implant material in ordinary atmosphere
Fatigue Life in Very High Cycle, and the Fatigue Life in Very High Cycle of metal implant in human body environment cannot be tested, therefore test out
The Fatigue Life in Very High Cycle accuracy of metal implant is the highest, and reference value is relatively low, limits entering of metal implant material technology
One step development.
Summary of the invention
In order to solve the problems referred to above, the present invention discloses a kind of physiological environment simulation dress being applied to ultrasonic accelerated fatigue test
Putting, this device is by simulation human physiological environment, it is possible to accurately test out metal implant material Very High Cycle in human body environment
Fatigue behaviour.
The technical problem to be solved realizes by the following technical solutions:
A kind of physiological environment analog being applied to ultrasonic accelerated fatigue test, is full of simulated body fluid including horn and inside
Environment pipe, described horn one end is placed in environment pipe, and wherein, one end that horn is placed in environment pipe connects part to be measured,
The other end can be connected with ultrasonic accelerated fatigue test device.
Described environment pipe is U-tube, is provided with lid in one end that environment pipe is connected with horn, and the other end is provided with pipe
Plug, described horn is fixed in lid and one end is through lid, and described environment pipe is additionally provided with inlet and leakage fluid dram.Make
Environment pipe is in sealing state, it is to avoid impurity or the interference of gas, is beneficial to the more real human body environment of simulation.
Described inlet connects a delivery tube one, and leakage fluid dram connects a delivery tube two, and described delivery tube one connects one
Individual water pump, delivery tube two connects a reserving liquid tank, and water pump is connected by delivery tube three with reserving liquid tank, described water pump also with one
Flow speed controller is connected.Flow speed controller for regulation and coutroi velocity, make in environment pipe the flowing of simulated body fluid closer to
The flowing of human body fluid, promotes the accuracy of test, avoids, because simulated body fluid flow velocity is excessive, part to be measured is caused an earnest simultaneously
Reason impact, changes its motion mode, and interference test causes test result to produce deviation.
It is fixed with an automatic constant-temperature-heating rod on described reserving liquid tank, fixes near the side of water pump at reserving liquid tank upper surface
One thermometer, this thermometer lower end is placed in reserving liquid tank, is used for observing liquid storage the temperature inside the box.
Described automatic constant-temperature-heating rod includes the thermal treatment zone and control zone, and control zone is placed in reserving liquid tank top, passes through control zone
Can realize the setting to heating-up temperature and regulation, the described thermal treatment zone is placed in reserving liquid tank through reserving liquid tank outer wall, and heating-up temperature is
20～50 DEG C, preferably 36～37 DEG C, degree of regulation is ± 0.5 DEG C.
Described lid is connected by screw with horn, and environment pipe is connected with lid by screw thread.
Described delivery tube one, delivery tube two and delivery tube three are managed for PEX, and simulated body fluid will not be caused dirt by safety and environmental protection
Contaminate and affect the accuracy of test.
It is equipped with steam vent on described pipe close and lid, in described steam vent, is provided with matched sealing-plug.Steam vent
Be provided with and beneficially simulated body fluid be filled in environment pipe, after being full of simulated body fluid in environment pipe, utilize sealing-plug sealing ring
Border is managed, it is to avoid simulated body fluid is by air pollution, and simulates the closed environment of real human body, promotes the accuracy of test.
All the time, for the test of metal implant Fatigue Life in Very High Cycle, directly test is all used in atmosphere to treat
Survey the Fatigue Life in Very High Cycle of part, also have the test of only a few after being soaked in normal saline by part to be measured, to be placed in air survey again
Examination, the result of test has greater difference with the fatigue behaviour in human body of actual metal implant, therefore, it is difficult to Accurate Prediction
Metal implant is service life in human body, and the reference value of the selection for manufacturing and designing metal implant is relatively low, seriously
Hinder the research and development of Artificial Intervention material.
Present invention applicant is for the purpose of raising metal implant fatigue property test accuracy, and devising one can
Apply to the physiological environment analog of ultrasonic accelerated fatigue test, different from the past directly part to be measured is placed in air ambient
Test, also different from part to be measured is soaked in re-test after normal saline, the part to be measured in the application can be placed in circulation all the time
The simulated body fluid of flowing tests its Fatigue Life in Very High Cycle, owing to the many kinds of substance in human body fluid all can part to be measured to metal
Causing chemical attack, this is a long-term and complex interaction process, and is not only the effect of Na+ and Cl-, utilizes this
Physiological environment analog in application can effectively simulate the interior environment close to human body fluid, makes part to be measured be placed in one also
Test its Fatigue Life in Very High Cycle, the fatigue behaviour of the metal implant that the result measured is more nearly in real human body and longevity
Life.There is the highest reference value, the further research and development of metal implant material technology can be effectively facilitated.
The application of a kind of physiological environment analog being applied to ultrasonic accelerated fatigue test, comprises the steps:
(1) horn is connected with ultrasonic accelerated fatigue test device, then part to be measured is fixed in horn, described to be measured
Part is Ti6Al7Nb alloy or Ti6Al4V alloy or TAMZ alloy or other metal materials, recycling pipe close and with horn
Lid sealed environment pipe；
(2) environment pipe is connected with reserving liquid tank and water pump, sets the heating-up temperature of automatic constant-temperature-heating rod on reserving liquid tank, treat
After reserving liquid tank temperature reaches setting value, set the flow velocity of flow speed controller, start water pump, make the simulated body fluid in reserving liquid tank fill
Full whole environment pipe；
(3) start ultrasonic accelerated fatigue test device, test the part to be measured Fatigue Life in Very High Cycle in simulated body fluid environment.
The present invention compared with prior art, has such advantages as and beneficial effect:
(1) by arranging environment pipe and horn, part to be measured is enable to test its super high cycle fatigue in simulated body fluid environment
Can, the result of test, closer to metal implant fatigue life in human body, has higher reference value, promotees further
Enter the development of metal implant material technology；
(2) by arranging reserving liquid tank and water pump, enable simulated body fluid to circulate, maintain the ion in environment pipe to be in balance
State, more meets the interior environment of human body, improves the accuracy of test result；
(3) by arranging automatic constant-temperature-heating rod, make simulated body fluid maintain body temperature state, promote test result further
Accuracy.
Accompanying drawing explanation
Accompanying drawing described herein is used for providing being further appreciated by the embodiment of the present invention, constitutes of the application
Point, it is not intended that the restriction to the embodiment of the present invention.In the accompanying drawings:
Fig. 1 is present configuration schematic diagram；
Fig. 2 is the embodiment of the present invention 1 test result schematic diagram；
Fig. 3 is the embodiment of the present invention 2 test result schematic diagram；
The parts title of labelling and correspondence in accompanying drawing:
1-horn, 2-environment pipe, 21-lid, 22-pipe close, 23-inlet, 24-leakage fluid dram, 3-part to be measured, 4-delivery tube
One, 5-delivery tube two, 6-water pump, 7-reserving liquid tank, 71-automatic constant-temperature-heating rod, 72-thermometer, the 73-thermal treatment zone, 74-controls
District, 8-delivery tube three, 9-flow speed controller, 10-steam vent.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with embodiment and accompanying drawing, to this
Invention is described in further detail, and the exemplary embodiment of the present invention and explanation thereof are only used for explaining the present invention, do not make
For limitation of the invention.
Embodiment 1
As it is shown in figure 1, a kind of physiological environment analog being applied to ultrasonic accelerated fatigue test, including horn 1 and inside
Being full of the environment pipe 2 of simulated body fluid, described horn 1 one end is placed in environment pipe 2, and wherein, horn 1 is placed in environment pipe 2
One end connect part 3 to be measured, the other end can be connected with ultrasonic accelerated fatigue test device.
Described environment pipe 2 is U-tube, is provided with lid 21 with horn 1 in one end that environment pipe 2 is connected, and the other end is arranged
There are pipe close 22, described horn 1 to be fixed in lid 21 and one end is through lid 21, described environment pipe 2 is additionally provided with feed liquor
Mouth 23 and leakage fluid dram 24.
Described inlet 23 connects a delivery tube 1, and leakage fluid dram 24 connects a delivery tube 25, described delivery tube 1
Connecting a water pump 6, delivery tube 25 connects a reserving liquid tank 7, and water pump 6 is connected by delivery tube 38 with reserving liquid tank 7, described
Water pump 6 is also connected with a flow speed controller 9.
An automatic constant-temperature-heating rod 71 it is fixed with, at reserving liquid tank 7 upper surface near the one of water pump 6 on described reserving liquid tank 7
A thermometer 72 is fixed in side, and this thermometer 72 lower end is placed in reserving liquid tank 7.
Described automatic constant-temperature-heating rod 71 includes the thermal treatment zone 73 and control zone 74, and control zone 74 is placed in reserving liquid tank 7 top, logical
Crossing control zone 74 and can realize the setting to heating-up temperature and regulation, the described thermal treatment zone 73 is placed in reserving liquid tank 7 through reserving liquid tank 7 outer wall
In, heating-up temperature is 20～50 DEG C, preferably 36～37 DEG C, and degree of regulation is ± 0.5 DEG C.
Described lid 21 is connected by screw with horn 1, and environment pipe 2 is connected with lid 21 by screw thread.
Described delivery tube 1, delivery tube 25 and delivery tube 38 are managed for PEX.
It is equipped with steam vent 10 on described pipe close 22 and lid 21, in described steam vent 10, is provided with matched sealing
Plug.
The application of a kind of physiological environment analog being applied to ultrasonic accelerated fatigue test, comprises the steps:
(1) horn is connected with ultrasonic accelerated fatigue test device, then part to be measured is fixed in horn, the present embodiment
The part to be measured used is Ti6Al7Nb alloy or Ti6Al4V alloy, recycling pipe close and the lid sealed environment with horn
Pipe；
(2) environment pipe is connected with reserving liquid tank and water pump, sets the heating-up temperature of automatic constant-temperature-heating rod on reserving liquid tank, this
It is 37 DEG C that embodiment arranges heating-up temperature, after reserving liquid tank temperature reaches setting value, sets the flow velocity of flow speed controller, starts
Water pump, makes the simulated body fluid in reserving liquid tank be full of whole environment pipe；
(3) start ultrasonic accelerated fatigue test device, test the part to be measured Fatigue Life in Very High Cycle in simulated body fluid environment.
The main component such as following table of step (2) described simulated body fluid:
| Ion | Na<sup>+</sup> | K<sup>+</sup> | Ca<sup>2+</sup> | Mg<sup>2+</sup> | HCO<sup>3-</sup> | Cl<sup>-</sup> | HPO4<sup>3-</sup> | SO4<sup>2-</sup> |
| Simulated body fluid (Mmol/L) | 142.0 | 5.0 | 2.5 | 1.5 | 4.2 | 148.5 | 1.0 | 0.5 |
Substantial amounts of Ti6Al7Nb alloy or Ti6Al4V alloy are the most each soaked by the present embodiment to be put at air ambient and simulated body fluid
In environment, after ultrasonic accelerated fatigue test, record the Fatigue Life in Very High Cycle of each part to be measured, and draw out Ti6Al7Nb accordingly
The S-N curve of matching in the most each comfortable air ambient and simulated body fluid environment distinguished by alloy and Ti6Al4V alloy.
Test result is as in figure 2 it is shown, Fig. 2 is specially Ti6Al7Nb alloy and the most each comfortable air of Ti6Al4V alloy
S-N curve in environment and simulated body fluid environment, represent respectively stress in each comfortable air ambient and simulated body fluid environment with
The curve of relation between fatigue life.
Wherein, l1For Ti6Al4V alloy S-N curve in air ambient, l2For Ti6Al4V alloy at analogue body pendular ring
S-N curve in border, l3For Ti6Al7Nb alloy S-N curve in air ambient, l4For Ti6Al7Nb alloy at simulated body fluid
S-N curve in environment, the vertical curve at abscissa 108 is scale line, is used for contrasting different materials in identical or different experiment
Under environment, part to be measured reaches to specify fatigue strength during cycle that is 108 time, can intuitively and effectively contrast different materials of the same race
Fatigue Life in Very High Cycle under environment, provides foundation and reference for selection when making metal implant.
From test result, Ti6Al4V alloy Fatigue Life in Very High Cycle in simulated body fluid environment is substantially less than it
Fatigue Life in Very High Cycle in air ambient, Ti6Al7Nb alloy Fatigue Life in Very High Cycle in simulated body fluid environment is notable
Less than its Fatigue Life in Very High Cycle in air ambient, this is due to Ti6Al4V alloy and Ti6Al7Nb alloy in atmosphere
The most only acted on by circulation machinery load, and in simulated body fluid environment, Ti6Al4V alloy and Ti6Al7Nb alloy are not only
Acted on by circulation machinery load, also by the chemical attack effect of simulated body fluid, accelerate its fatigue rupture, be therefore placed in mould
Intend the metal part to be measured that the Fatigue Life in Very High Cycle of the metal part to be measured in fluid environment is substantially less than placed in air ambient.
S-N curve l2For having the broken line of a bending, occur that the place of bending is that fatigue rupture presents different mechanism
Demarcation line.Owing to titanium alloy itself has stronger corrosion resistance, surface easily generates oxide-film, when Ti6Al4V alloy is placed in sky
In compression ring border, its surface film oxide is not destroyed, so the Fatigue Life in Very High Cycle of titanium alloy is not affected, thus its S-N
Curve l1For straight line.But when it is placed in simulated body fluid environment, due to the effect of mechanical load, may result in oxidation
Film destroys, and material is acted on mechanical load by chemical attack simultaneously, causes tired just because of the interaction between them
Labor performance significantly reduces, and occurs that the reason of flex point is because when load is reduced to certain value, and oxide-film becomes to be less susceptible to brokenly
Bad, and along with the further reduction of load, the destructiveness of oxide-film is more and more lower, the metal material of oxide-film internal protection
The chemical attack being subject to is more and more weak, thus the fatigue life of part to be measured is compared to just increasing before flex point, occurs in that approximation water
Flat straightway.On the other hand, owing to oxide-film becomes increasingly difficult to destroy, simulated body fluid is to part super high cycle fatigue to be measured
The impact of energy is more and more less, it is therefore envisaged, when load drops to of a sufficiently low, if oxide-film can not destroy completely, to be measured
Part Fatigue Life in Very High Cycle in simulated body fluid is consistent with the result recorded in air ambient the most at last, l from Fig. 11And l2
The trend that will be intersected in any is measurable.
Embodiment 2
As it is shown in figure 1, a kind of physiological environment analog being applied to ultrasonic accelerated fatigue test, including horn 1 and inside
Being full of the environment pipe 2 of simulated body fluid, described horn 1 one end is placed in environment pipe 2, and wherein, horn 1 is placed in environment pipe 2
One end connect part 3 to be measured, the other end can be connected with ultrasonic accelerated fatigue test device.
Described environment pipe 2 is U-tube, is provided with lid 21 with horn 1 in one end that environment pipe 2 is connected, and the other end is arranged
There are pipe close 22, described horn 1 to be fixed in lid 21 and one end is through lid 21, described environment pipe 2 is additionally provided with feed liquor
Mouth 23 and leakage fluid dram 24.
Described inlet 23 connects a delivery tube 1, and leakage fluid dram 24 connects a delivery tube 25, described delivery tube 1
Connecting a water pump 6, delivery tube 25 connects a reserving liquid tank 7, and water pump 6 is connected by delivery tube 38 with reserving liquid tank 7, described
Water pump 6 is also connected with a flow speed controller 9.
An automatic constant-temperature-heating rod 71 it is fixed with, at reserving liquid tank 7 upper surface near the one of water pump 6 on described reserving liquid tank 7
A thermometer 72 is fixed in side, and this thermometer 72 lower end is placed in reserving liquid tank 7.
Described automatic constant-temperature-heating rod 71 includes the thermal treatment zone 73 and control zone 74, and control zone 74 is placed in reserving liquid tank 7 top, logical
Crossing control zone 74 and can realize the setting to heating-up temperature and regulation, the described thermal treatment zone 73 is placed in reserving liquid tank 7 through reserving liquid tank 7 outer wall
In, heating-up temperature is 20～50 DEG C, preferably 36～37 DEG C, and degree of regulation is ± 0.5 DEG C.
Described lid 21 is connected by screw with horn 1, and environment pipe 2 is connected with lid 21 by screw thread.
Described delivery tube 1, delivery tube 25 and delivery tube 38 are managed for PEX.
It is equipped with steam vent 10 on described pipe close 22 and lid 21, in described steam vent 10, is provided with matched sealing
Plug.
The application of a kind of physiological environment analog being applied to ultrasonic accelerated fatigue test, comprises the steps:
(1) horn is connected with ultrasonic accelerated fatigue test device, then part to be measured is fixed in horn, described to be measured
Part is Ti6Al7Nb alloy or Ti6Al4V alloy or TAMZ alloy, recycling pipe close and the lid sealed environment with horn
Pipe；
(2) environment pipe is connected with reserving liquid tank and water pump, sets the heating-up temperature of automatic constant-temperature-heating rod on reserving liquid tank, this
It is 36 DEG C that embodiment arranges heating-up temperature, after reserving liquid tank temperature reaches setting value, sets the flow velocity of flow speed controller, starts
Water pump, makes the simulated body fluid in reserving liquid tank be full of whole environment pipe；
(3) start ultrasonic accelerated fatigue test device, test the part to be measured Fatigue Life in Very High Cycle in simulated body fluid environment.
The main component of described simulated body fluid such as following table:
| Ion | Na<sup>+</sup> | K<sup>+</sup> | Ca<sup>2+</sup> | Mg<sup>2+</sup> | HCO<sup>3-</sup> | Cl<sup>-</sup> | HPO4<sup>3-</sup> | SO4<sup>2-</sup> |
| Simulated body fluid (Mmol/L) | 142.0 | 5.0 | 2.5 | 1.5 | 4.2 | 148.5 | 1.0 | 0.5 |
Substantial amounts of TAMZ alloy is soaked by the present embodiment respectively to be put in air ambient and simulated body fluid environment, accelerates fatigue through ultrasonic
After test, record the Fatigue Life in Very High Cycle of each part to be measured, and draw out TAMZ alloy accordingly at air ambient and simulated body fluid
The S-N curve of matching in environment.
Test result as it is shown on figure 3, Fig. 3 be specially TAMZ alloy respectively in air ambient and simulated body fluid environment
S-N curve, represents TAMZ alloy test specimen stress in air ambient and simulated body fluid environment respectively and closes between fatigue life
The curve of system.
Wherein, l5For TAMZ alloy S-N curve in air ambient, l6For TAMZ alloy in simulated body fluid environment
S-N curve, abscissa 2 × 108The vertical curve at place is scale line, is used for contrasting different materials in identical or different experimental situation
Under, part to be measured reaches to specify cycle that is 2 × 108Fatigue strength time secondary, can intuitively and effectively contrast different materials of the same race
Fatigue Life in Very High Cycle under environment, provides foundation and reference for selection when making metal implant.
From test result, TAMZ alloy Fatigue Life in Very High Cycle in simulated body fluid environment is substantially less than it at sky
Fatigue Life in Very High Cycle in compression ring border, this is owing to TAMZ alloy is the most only made by circulation machinery load in atmosphere
With, and in simulated body fluid environment, TAMZ alloy is not only acted on by circulation machinery load, also by the chemistry of simulated body fluid
Corrosiveness, accelerates its fatigue rupture, and the Fatigue Life in Very High Cycle of the metal part to be measured being therefore placed in simulated body fluid environment shows
Write less than the metal part to be measured being placed in air ambient.
S-N curve l6For having the broken line of a bending, occur that the place of bending is that fatigue rupture presents different mechanism
Demarcation line.Owing to TAMZ alloy itself has stronger corrosion resistance, surface easily generates oxide-film, when TAMZ alloy is placed in air
In environment, its surface film oxide is not destroyed, so the Fatigue Life in Very High Cycle of TAMZ alloy is not affected, thus its S-N
Curve l5For straight line.But when it is placed in simulated body fluid environment, due to the effect of mechanical load, may result in oxidation
Film destroys, and material is acted on mechanical load by chemical attack simultaneously, causes tired just because of the interaction between them
Labor performance significantly reduces, and occurs that the reason of flex point is because when load is reduced to certain value, and oxide-film becomes to be less susceptible to brokenly
Bad, and along with the further reduction of load, the destructiveness of oxide-film is more and more lower, the metal material of oxide-film internal protection
The chemical attack being subject to is more and more weak, thus the fatigue life of part to be measured is compared to just increasing before flex point, occurs in that approximation water
Flat straightway.On the other hand, owing to oxide-film becomes increasingly difficult to destroy, simulated body fluid is to part super high cycle fatigue to be measured
The impact of energy is more and more less, it is therefore envisaged, when load drops to of a sufficiently low, if oxide-film can not destroy completely, to be measured
Part Fatigue Life in Very High Cycle in simulated body fluid is consistent with the result recorded in air ambient the most at last, l from Fig. 35And l6
The trend that will be intersected in any is measurable.
In sum, the physiological environment analog in the present invention is used in ultrasonic accelerated fatigue test, Ke Yi great
The big accuracy improving metal implant Fatigue Life in Very High Cycle test in human body, the Very High Cycle promoting metal implant is tired
The reference value of labor performance test, it is possible to effectively facilitate the further development of metal implant material technology.
Above-described detailed description of the invention, has been carried out the purpose of the present invention, technical scheme and beneficial effect further
Describe in detail, be it should be understood that the detailed description of the invention that the foregoing is only the present invention, be not intended to limit the present invention
Protection domain, all within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. done, all should comprise
Within protection scope of the present invention.
Claims (10)
1. the physiological environment analog being applied to ultrasonic accelerated fatigue test, it is characterised in that: include horn and ring
Border is managed, and described horn one end is placed in environment pipe.
A kind of physiological environment analog being applied to ultrasonic accelerated fatigue test the most according to claim 1, its feature
It is: described environment pipe is U-tube, is provided with lid in one end that environment pipe is connected with horn, and the other end is provided with pipe close, institute
State horn one end through lid.
A kind of physiological environment analog being applied to ultrasonic accelerated fatigue test the most according to claim 1 and 2, it is special
Levy and be: on described environment pipe, be additionally provided with inlet and leakage fluid dram.
A kind of physiological environment analog being applied to ultrasonic accelerated fatigue test the most according to claim 3, its feature
Being: described inlet connects a delivery tube one, leakage fluid dram connects a delivery tube two, and described delivery tube one connects a water
Pump, delivery tube two connects a reserving liquid tank, and water pump is connected by delivery tube three with reserving liquid tank.
A kind of physiological environment analog being applied to ultrasonic accelerated fatigue test the most according to claim 4, its feature
It is: be fixed with an automatic constant-temperature-heating rod on described reserving liquid tank, fix one at reserving liquid tank upper surface near the side of water pump
Individual thermometer, this thermometer lower end is placed in reserving liquid tank.
A kind of physiological environment analog being applied to ultrasonic accelerated fatigue test the most according to claim 5, its feature
It is: the heating-up temperature of described automatic constant-temperature-heating rod is 20～50 DEG C, and degree of regulation is ± 0.5 ° of C.
A kind of physiological environment analog being applied to ultrasonic accelerated fatigue test the most according to claim 5, its feature
It is: described water pump is also connected with a flow speed controller.
A kind of physiological environment analog being applied to ultrasonic accelerated fatigue test the most according to claim 7, its feature
It is: on described pipe close and lid, be equipped with steam vent, in described steam vent, is provided with matched sealing-plug.
9. a kind of physiological environment simulation dress being applied to ultrasonic accelerated fatigue test as according to any one of claim 1～8
The application put, it is characterised in that comprise the steps:
(1) horn is connected with ultrasonic accelerated fatigue test device, then part to be measured is fixed in horn, recycling pipe
Plug and the lid sealed environment pipe with horn；
(2) environment pipe is connected with reserving liquid tank and water pump, sets the heating-up temperature of automatic constant-temperature-heating rod on reserving liquid tank, treat
After reserving liquid tank temperature reaches setting value, set the flow velocity of flow speed controller, start water pump, make the simulated body fluid in reserving liquid tank fill
Full whole environment pipe；
(3) start ultrasonic accelerated fatigue test device, test the part to be measured Fatigue Life in Very High Cycle in simulated body fluid environment.
The application of a kind of physiological environment analog being applied to ultrasonic accelerated fatigue test the most according to claim 9,
It is characterized in that: described part to be measured is Ti6Al7Nb alloy or Ti6Al4V alloy or TAMZ alloy or other metal materials.
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| CN109549665A (en) * | 2018-11-15 | 2019-04-02 | 青岛海信医疗设备股份有限公司 | A kind of ultrasonic device detection system |
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