CN104990787A - Parallel-disc material characteristic experimental device - Google Patents
Parallel-disc material characteristic experimental device Download PDFInfo
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- CN104990787A CN104990787A CN201510368716.1A CN201510368716A CN104990787A CN 104990787 A CN104990787 A CN 104990787A CN 201510368716 A CN201510368716 A CN 201510368716A CN 104990787 A CN104990787 A CN 104990787A
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Abstract
The invention relates to a parallel-disc material characteristic experimental device for material characteristic detection, which is based on a shearing mode, an extruding mode and a shearing and extruding compound mode. The parallel-disc material characteristic experimental device comprises an upper parallel disc and a lower parallel disc which form a group and correspond to each other, as well as a pc, an extrusion loading motor is in driving connection with a slider capable of moving up and down along a guide rail on a rack, a reducer in driving connection with a shearing loading motor is fixedly arranged at the lower end of the slider, the output shaft of the reducer is fixedly connected with the upper parallel disc, the lower end of the lower parallel disc is fixedly arranged on a base of the L-shaped rack through a torque sensor and a pressure sensor in sequence, a linear displacement sensor on the slider, an angular displacement sensor on the output shaft of the reducer, the torque sensor and the pressure sensor are respectively in communication connection with the pc through data acquisition cards, and the extrusion loading motor and the shearing loading motor are respectively in control connection with the pc through drivers. The steady-state and dynamic characteristic experiments of various materials in the shearing mode, the extruding mode and the shearing and extruding compound mode can be realized on the parallel-disc material characteristic experimental device.
Description
Technical field
The present invention relates to experimental facilities, particularly a kind of material behavior experimental provision realized based on shear mode, squeeze mode and composite mode thereof that material dynamic mechanical is analyzed.
Background technology
In material behavior experiment, different according to test mode, material behavior mainly contains based on shear mode with based on detection methods such as squeeze modes.Method of testing based on shear mode is the parallel discs (or cylinder) of application two coaxial rotatings, measured material is placed between two dishes, relatively rotating of two dishes is utilized to make tested elastic body bear shearing force, torque sensor is utilized to detect the moment transmitted, obtain shear stress and corresponding shear rate, obtain apparent viscosity or storage modulus, loss modulus further.Method of testing based on squeeze mode utilizes parallel disk to do relative pulling open and close motion, and measured matter has compression deformation in various degree under pressure, records elastomeric elastic performance.
Experimental facilities at present in the world for shear mode, squeeze mode is varied, but diversity is only present in the difference that sensor structural arrangement and type of drive exist, and the principle of carrying out testing is close to identical.There is limited evidence currently of has experimental facilities can carry out extruding and shearing the material behavior experiment of Combined-operating mode and can to carry out the material ranges of material experiment by the limitation of experimental provision less.In addition, the research for intellectual material (magnetic flow liquid, the magnetic rheology elastic body etc.) rheological property under squeezing action is still in the junior stage.
Summary of the invention
The object of the invention is to the limitation for overcoming current material behavior experimental facilities, proposing a kind of parallel disk type material behavior experimental provision carrying out plurality of material properties experiment.Can realize the extrusion experiment of resilient material, stable state and the extrusion shearing complication experiment under dynamic shearing experiment and different pretightning force and the intellectual material such as magnetic flow liquid, magnetic rheology elastic body shearing and extrude the experiment of mode of operation.
Parallel disk type material behavior experimental provision of the present invention, comprises one group of corresponding upper parallel discs, lower parallel discs and pc machine; Set firmly an extruding loading motor in the upper end of a L shape frame, the vertical guide rail being installed in frame is arranged can along the slide block of this guide rail movement, and the output shaft of extruding loading motor is connected with slider-actuated by shaft coupling and screw pair; Set firmly one in the lower end of slide block and drive by shearing loading motor the speed reduction unit connected, the output shaft of speed reduction unit is connected mutually with described upper parallel discs, and the lower end of described lower parallel discs is installed in by torque sensor and pressure transducer on the base of L shape frame successively;
Described slide block is provided with linear displacement transducer, the output shaft of speed reduction unit is provided with angular displacement sensor;
Described torque sensor, pressure transducer, linear displacement transducer are connected with the communication of pc machine respectively by data collecting card with angular displacement sensor, and described extruding loading motor and shearing loading motor are respectively by driver and pc machine control linkage.
Also comprise the linear hall sensor be embedded on lower parallel discs surface and two magnetizing coils be electrically connected with direct supply be respectively nested with respectively in upper parallel discs, lower parallel discs periphery, linear hall sensor is connected with the communication of pc machine by data collecting card.
Described upper and lower parallel discs is prepared by permeability magnetic material.
Adopt parallel disk type material behavior experimental provision of the present invention can realize the experiment of following material behavior to detect:
Material behavior under the detrusion of the material such as rubber, pitch;
Material behavior under the crimp of the material such as rubber, pitch;
The material such as rubber, pitch is simultaneously by the material behavior under detrusion and crimp;
Material behavior under the detrusion of the material such as magnetic flow liquid, magnetic rheology elastic body;
Material behavior under the crimp of the material such as magnetic flow liquid, magnetic rheology elastic body;
Magnetic flow liquid, magnetic rheology elastic body etc. are simultaneously by the material behavior under detrusion and crimp.
The present invention has following outstanding advantages:
1) parallel disk type material behavior experimental provision diverse in function of the present invention, has the ability to realize the material behavior experiment under the multiple-working mode such as shear mode, squeeze mode composite means.
2) the present invention tests applied widely.Both can meet the material behavior research requirement of elasticity, viscoelastic material (as rubber, pitch etc.), the material behavior of having the ability again to carry out the intellectual material such as magnetic flow liquid, magnetic rheology elastic body is tested.
3) experimental provision of the present invention can meet the research requirement of the shearing of the intellectual material such as magnetic flow liquid, magnetic rheology elastic body and extruding, stretching (under strong magnetic field circumstance) mode of operation due to the introducing and arranging of magnetizing coil, linear hall sensor, ensure that magnetic induction density direction is all the time perpendicular to the sense of rotation of upper and lower parallel discs, and the magnetic induction density variation range that can provide is large, change accurately, rapidly.
Accompanying drawing explanation
Fig. 1 is a kind of front view of parallel disk type material behavior experimental provision;
Fig. 2 is a kind of side view of parallel disk type material behavior experimental provision;
Fig. 3 is the front view of another parallel disk type material behavior experimental provision structure;
Fig. 4 is the partial structurtes schematic diagram of lower parallel discs 9 shown in Fig. 1.
Embodiment
The embodiment provided below in conjunction with accompanying drawing is described in further detail the present invention.
Embodiment 1
With reference to Fig. 1 and 2, a kind of parallel disk type material behavior experimental provision, comprises one group of corresponding upper parallel discs 8, lower parallel discs 9 and pc machine; Set firmly an extruding loading motor 1 in the upper end of a L shape frame 12, the vertical guide rail 5 being installed in frame 12 is arranged can along the slide block 4 of this guide rail movement, and the output shaft of extruding loading motor 1 is driven with slide block 4 by shaft coupling 2 and screw pair 3 and is connected; Set firmly one in the lower end of slide block 4 and drive the speed reduction unit 7 of connection by shearing loading motor 6, the output shaft of speed reduction unit 7 is connected mutually with described upper parallel discs 8, and the lower end of described lower parallel discs 9 is installed in by torque sensor 10 and pressure transducer 11 on the base of L shape frame 12 successively;
Described slide block 4 is provided with linear displacement transducer 13, the output shaft of speed reduction unit 7 is provided with angular displacement sensor 14;
Described torque sensor 10, pressure transducer 11, linear displacement transducer 13 are connected with the communication of pc machine respectively by data collecting card with angular displacement sensor 14, and described extruding loading motor 1 and shearing loading motor 6 are respectively by driver and pc machine control linkage.
The principle of work of this experimental provision is: by extruding the driving of loading motor 1, makes parallel discs 8 move up and down the extruding realized the measured material sample be placed between upper and lower parallel discs; By shearing the driving of loading motor 6, parallel discs 8 is done shearing that horizontal rotation motion realizes measured material sample, can realize the test of following material behavior.
One, squeeze mode experiment:
A. the serviceability of detection of straight lines displacement transducer and pressure transducer, and carry out the staking-out work of sensor in advance;
B. measured material is placed on lower parallel discs, the attitude of adjustment measured material;
C. drive extruding loading motor, in adjustment, parallel discs height makes itself and measured material keep in touch;
D. drive extruding loading motor that parallel discs is declined further to extrude fluid to be measured, the energisation mode that three kinds different can be adopted: be 1. control model with extrusion load, with certain loading velocity, sample is loaded, unload after keeping certain hour when sample deformation amount reaches preset value.2. be control model with displacement, main control system according to setting program at short notice (as 5s) extruded sample make it strain to reach preset value, choose thereafter rational time step and gather pressure sensor signal until experiment terminates.3. be control model with displacement, setup control mainframe program makes parallel discs load a Static Correction with slow uniform loading velocity to sample, applies the racking strain of sinusoidal signal in this, as equilibrium position.
E. observation experiment phenomenon record the change in electric rule of linear displacement transducer, pressure transducer on main control system, obtains the Changing Pattern of respective material parameter.
Two, shear mode experiment:
A. the serviceability of detection of straight lines displacement transducer, angular displacement sensor and torque sensor, and carry out the staking-out work of sensor in advance;
B. be placed on by measured material on lower parallel discs, the attitude of adjustment measured material, makes the dead in line of the geometric center of tested sample and upper and lower parallel discs;
C. drive extruding loading motor, in adjustment, parallel discs height makes it contact with measured material and apply certain pretightning force, prevents from occurring material and wall slippage in shear history.Drive and shear loading motor, different pumping signals can be applied: 1. the angular displacement of above parallel discs is control model to upper parallel discs, main control system according to setting program at short notice (as 5s) shear sample and make it strain to reach preset value, choose thereafter rational time step and gather torque sensor signal until experiment terminates.2. the angular displacement of above parallel discs is control model, and setup control mainframe program makes parallel discs apply the shear strain of a sinusoidal signal to sample.
D. observation experiment phenomenon record the Changing Pattern of linear displacement transducer, torque sensor, angular displacement sensor electric signal on main control system;
Three, extrusion shearing composite mode experiment:
A. the serviceability of detection of straight lines displacement transducer, pressure transducer, angular displacement sensor and torque sensor, and carry out the staking-out work of sensor in advance;
B. be placed on by measured material on lower parallel discs, the attitude of adjustment measured material makes the dead in line of the geometric center of tested sample and upper and lower parallel discs;
C. drive extruding loading motor, in adjustment, parallel discs height makes it contact with measured material.Now drive extruding loading motor and shear loading motor, different extruding can be applied to upper parallel discs and shear the composite signal (as shown in extruding operating mode and shearing working condition experimenting method) encouraged, utilize the relative motion of upper and lower parallel discs to make measured material produce shearing, crimp.
D. observe the material experimental phenomena being sheared and extrude and on main control system, record the Changing Pattern of linear displacement transducer, torque sensor, pressure transducer, angular displacement sensor electric signal;
Embodiment 2
With reference to Fig. 3,4, the structure of embodiment 1 is set up following setting, the material behavior experiment of the intellectual material such as magnetic flow liquid, magnetic rheology elastic body can be realized.Namely, comprise the linear hall sensor 15 be embedded on lower parallel discs 9 surface and two magnetizing coils be electrically connected with direct supply respectively 16 be nested with respectively in upper parallel discs 8, lower parallel discs 9 periphery, linear hall sensor 15 is connected with the communication of pc machine by data collecting card.Described upper and lower parallel discs is prepared by permeability magnetic material.
Under this constructional device, by extruding the driving of loading motor 1, parallel discs 8 is made to move up and down the extruding realized the measured material sample be placed between upper and lower parallel discs; By shearing the driving of loading motor 6, make parallel discs 8 do horizontal rotation motion and realize the shearing of measured material sample, simultaneously drive coil 16 accesses stable DC circuit to produce magnetic field, measured material is in all the time relatively stable and perpendicular to the magnetic field of upper and lower parallel discs sense of rotation.The test of following material behavior can be realized:
One, squeeze mode experiment:
A. the serviceability of detection of straight lines displacement transducer and pressure transducer, and carry out the staking-out work of sensor in advance;
B. measured material is placed on lower parallel discs, the attitude of adjustment measured material.Add install coil, coil support, pillar.Utilize direct supply to pass into same direction current to two coils, coil connects can connect in parallel connection.Change the size of current passing into coil, realize the change of two parallel discs gap location magnetic field intensitys, and measure the magnetic field intensity in two parallel discs gaps by linear hall sensor.
C. drive extruding loading motor, in adjustment, parallel discs height makes itself and measured material keep in touch;
D. drive extruding loading motor that parallel discs is declined further to extrude fluid to be measured, the energisation mode that three kinds different can be adopted: be 1. control model with extrusion load, with certain loading velocity, sample is loaded, unload after keeping certain hour when sample deformation amount reaches preset value.2. be control model with displacement, main control system according to setting program at short notice (as 5s) extruded sample make it strain to reach preset value, choose thereafter rational time step and gather pressure sensor signal until experiment terminates.3. be control model with displacement, setup control mainframe program makes parallel discs load a Static Correction with slow uniform loading velocity to sample, applies the racking strain of sinusoidal signal in this, as equilibrium position.
E. observation experiment phenomenon record the change in electric rule of linear displacement transducer, pressure transducer on main control system, obtains the Changing Pattern of respective material parameter.
Two, shear mode experiment:
A. the serviceability of detection of straight lines displacement transducer, angular displacement sensor and torque sensor, and carry out the staking-out work of sensor in advance;
B. be placed on by measured material on lower parallel discs, the attitude of adjustment measured material, makes the dead in line of the geometric center of tested sample and upper and lower parallel discs.Utilize direct supply to pass into same direction current to two coils, coil connects can connect in parallel connection.Change the size of current passing into coil, realize the change of two parallel discs gap location magnetic field intensitys, and measure the magnetic field intensity in two parallel discs gaps by linear hall sensor.
C. drive extruding loading motor, suitably adjust upper parallel discs height according to the viscosity characteristics of magnetorheological materials, prevent from shear history, occurring material and wall slippage.Drive and shear loading motor, different pumping signals can be applied: 1. the angular displacement of above parallel discs is control model to upper parallel discs, main control system according to setting program at short notice (as 5s) shear sample and make it strain to reach preset value, choose thereafter rational time step and gather torque sensor signal until experiment terminates.2. the angular displacement of above parallel discs is control model, and setup control mainframe program makes parallel discs apply the shear strain of a sinusoidal signal to sample.
D. observation experiment phenomenon record the Changing Pattern of linear displacement transducer, torque sensor, angular displacement sensor electric signal on main control system;
Three, extrusion shearing composite mode experiment:
A. the serviceability of detection of straight lines displacement transducer, pressure transducer, angular displacement sensor and torque sensor, and carry out the staking-out work of sensor in advance;
B. be placed on by measured material on lower parallel discs, the attitude of adjustment measured material makes the dead in line of the geometric center of tested sample and upper and lower parallel discs.Utilize direct supply to pass into same direction current to two coils, coil connects can connect in parallel connection.Change the size of current passing into coil, realize the change of two parallel discs gap location magnetic field intensitys, and measure the magnetic field intensity in two parallel discs gaps by linear hall sensor;
C. drive extruding loading motor, suitably adjust upper parallel discs height according to the viscosity characteristics of magnetorheological materials, make it contact with measured material.Now drive extruding loading motor and shear loading motor, can different extruding be applied to upper parallel discs and shear the composite signal of excitation, utilize the relative motion of upper and lower parallel discs to make measured material produce shearing, crimp;
D. observe the material experimental phenomena being sheared and extrude and on main control system, record the Changing Pattern of linear displacement transducer, torque sensor, pressure transducer, angular displacement sensor electric signal.
Claims (3)
1. a parallel disk type material behavior experimental provision, comprises one group of corresponding upper parallel discs (8), lower parallel discs (9) and pc machine, it is characterized in that:
An extruding loading motor (1) is set firmly in the upper end of a L shape frame (12), the upper setting of vertical guide rail (5) being installed in frame (12) can along the slide block of this guide rail movement (4), and the output shaft of extruding loading motor (1) is driven with slide block (4) by shaft coupling (2) and screw pair (3) and is connected; Set firmly one in the lower end of slide block (4) and drive by shearing loading motor (6) speed reduction unit (7) connected, the output shaft of speed reduction unit (7) is connected mutually with described upper parallel discs (8), and the lower end of described lower parallel discs (9) is installed on the base of L shape frame (12) by torque sensor (10) and pressure transducer (11) successively;
Described slide block (4) is provided with linear displacement transducer (13), the output shaft of speed reduction unit (7) is provided with angular displacement sensor (14);
Described torque sensor (10), pressure transducer (11), linear displacement transducer (13) are connected with the communication of pc machine respectively by data collecting card with angular displacement sensor (14), and described extruding loading motor (1) and shearing loading motor (6) are respectively by driver and pc machine control linkage.
2. parallel disk type material behavior experimental provision according to claim 1, it is characterized in that: also comprise the linear hall sensor (15) be embedded on lower parallel discs (9) surface and two magnetizing coils be electrically connected with direct supply respectively (16) be nested with respectively in upper parallel discs (8), lower parallel discs (9) periphery, linear hall sensor (15) is connected with the communication of pc machine by data collecting card.
3. parallel disk type material behavior experimental provision according to claim 2, is characterized in that described upper and lower parallel discs is prepared by permeability magnetic material.
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Cited By (4)
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| CN105445119A (en) * | 2015-11-13 | 2016-03-30 | 长安大学 | Device and method for testing torsion resistance and shear performance of bituminous mixture |
| CN110487672A (en) * | 2019-08-08 | 2019-11-22 | 上海理工大学 | A kind of device for measuring force measuring yield bearing stress after magnetorheological fluid magnetizes |
| CN110873646A (en) * | 2019-12-03 | 2020-03-10 | 中国航空综合技术研究所 | System and method for testing storage modulus and loss modulus of O-shaped ring |
| CN113484165A (en) * | 2021-07-30 | 2021-10-08 | 中国航空工业集团公司济南特种结构研究所 | Efficient test method for shearing mechanical property of composite material |
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| CN204705536U (en) * | 2015-06-29 | 2015-10-14 | 吉林大学 | Parallel disk type material behavior experimental provision |
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Patent Citations (4)
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| CN201555779U (en) * | 2009-10-23 | 2010-08-18 | 北京工业大学 | Repeated load test device under composite stress |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105445119A (en) * | 2015-11-13 | 2016-03-30 | 长安大学 | Device and method for testing torsion resistance and shear performance of bituminous mixture |
| CN105445119B (en) * | 2015-11-13 | 2018-01-12 | 长安大学 | A kind of test device and method of asphalt anti-torsion and cutting performance |
| CN110487672A (en) * | 2019-08-08 | 2019-11-22 | 上海理工大学 | A kind of device for measuring force measuring yield bearing stress after magnetorheological fluid magnetizes |
| CN110873646A (en) * | 2019-12-03 | 2020-03-10 | 中国航空综合技术研究所 | System and method for testing storage modulus and loss modulus of O-shaped ring |
| CN110873646B (en) * | 2019-12-03 | 2021-04-23 | 中国航空综合技术研究所 | System and method for testing storage modulus and loss modulus of O-shaped ring |
| CN113484165A (en) * | 2021-07-30 | 2021-10-08 | 中国航空工业集团公司济南特种结构研究所 | Efficient test method for shearing mechanical property of composite material |
| CN113484165B (en) * | 2021-07-30 | 2024-04-09 | 中国航空工业集团公司济南特种结构研究所 | Efficient test method for shearing mechanical property of composite material |
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