CN205138897U - Test system of doing all can a little based on cantilever beam - Google Patents
Test system of doing all can a little based on cantilever beam Download PDFInfo
- Publication number
- CN205138897U CN205138897U CN201520899601.0U CN201520899601U CN205138897U CN 205138897 U CN205138897 U CN 205138897U CN 201520899601 U CN201520899601 U CN 201520899601U CN 205138897 U CN205138897 U CN 205138897U
- Authority
- CN
- China
- Prior art keywords
- girder
- semi
- free end
- cantilever beam
- micro
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model discloses a test system of doing all can a little based on cantilever beam. The utility model discloses a cantilever beam, it is fixed to be surveyed fibrous one end, and the free end relatively fixed of the other end and cantilever beam is through mechanical translation platform removal cantilever beam for surveyed the fibre elongation, produce for simultaneously cantilever beam reaction force and warp, through the atress of measurement cantilever beam and the displacement of free end, obtain being surveyed fibrous power - displacement curve, thereby obtain being surveyed fibrous elastic modulus, perhaps surveyed the shear strength of fibre with the base member interface, the atress of cantilever beam and the displacement of free end can all accurately record to small power and the micro -strain that the fibre received also can accurately obtain being surveyed, furthermore, the utility model discloses a testing part is the cantilever beam, and its test mode is simple and convenient, receives space geometrical constraint little, and test performance can all keep good stability under environment such as various temperature, atmospheric pressure, so can satisfy different environment's in situ test requirement.
Description
Technical field
The utility model relates to micro-power experiment test, is specifically related to a kind of micro-force test system based on semi-girder.
Background technology
Along with the high speed development of modern society, obtain in the mechanics property analysis of the small force value of micro-ox level in medical science, minute manufacturing and MEMS (micro electro mechanical system) and apply more and more widely.But China passes system for the small force value of below 10N not yet foundation amount at present.Domestic do not have concrete structural design and job operation for micro-force measuring apparatus, and therefore studying a set of micro-force measurement system is highly significant.
On the other hand, due to advantages such as its mechanical property are good, quality is light, various fibre reinforced composites are obtained in every field and apply widely, work so the mechanical property of combination interface of research single fiber mechanical property and fiber and matrix is also necessary one.But, very little after the required experiment power of two tests, simultaneously do not find the micro-power experimental system meeting single fiber dependence test at present yet, and so set up a set of micro-force test system related to this be and significant.
Utility model content
In order to realize the Mechanics Performance Testing relevant to single fiber, the utility model proposes a kind of micro-force test system based on semi-girder, utilizing high-precision foil gauge, miniature inductive amplifier and laser displacement gauge, can accurately measure micro-power and micrometric displacement.
The purpose of this utility model is to propose a kind of micro-force test system based on semi-girder.
Micro-force test system based on semi-girder of the present utility model comprises: semi-girder, foil gauge, mechanical translation platform, laser displacement gauge, sample fixer, miniature inductive amplifier, data collecting card, motion control card and computing machine; Wherein, one end of semi-girder is fixed on mechanical translation platform, and the other end is free end; The surface of semi-girder arranges foil gauge, and foil gauge is connected with miniature inductive amplifier, and miniature inductive amplifier is connected with data collecting card, and data collecting card is connected with computing machine; Mechanical translation platform is connected with motion control card, and motion control card is connected with computing machine; One end of tested fiber is fixed on sample fixer, and the other end is arranged on the free end of semi-girder, fixes with free end relative position; Laser displacement gauge aims at the end points that tested fiber is connected with the free end of semi-girder, and laser displacement gauge is connected to computing machine.
The material of semi-girder adopts steel disc, estimates the elastic modulus of tested fiber and the shear resistance with basal body interface, selects the thickness of semi-girder, thickness between 0.2 ~ 1mm, to meet different measuring accuracies and range.
The utility model utilizes the power susceptibility of semi-girder, the moderate finite deformation of semi-girder under small power effect, more logical many Wheatstone bridges measure this distortion, and small force signal is converted to larger electric signal, thus accurately measure small acting force, to meet micro-Force meansurement requirement.
Micro-force test method based on semi-girder of the present utility model, comprises the following steps:
1) according to the tested fiber estimated elastic modulus and estimate tensile force f with the shear resistance of basal body interface, then select the semi-girder of applicable thickness according to the relation of the distortion of pulling force and semi-girder, to ensure that the distortion y of semi-girder is not more than 10mm; One end of semi-girder is fixed on mechanical translation platform, and the other end is free end, prepares to test;
2) prepare single tested fiber, one end is fixed on sample fixer, and the other end is arranged on the free end of semi-girder, fixes with free end relative position;
3) return to zero: computer controlled machine tool translation stage moves, and strains tested fiber gradually, foil gauge measures semi-girder stressed F, when F just greater than zero time, mechanical translation platform stops mobile, and now the stressed of semi-girder is set to zero;
4) travelling speed of the good mechanical translation platform of computer installation and distance, then starts test;
5) mechanical translation platform moves along the axial direction of tested fiber, and tested fiber under tension is elongated, and tested fiber is to semi-girder reacting force simultaneously, and semi-girder is out of shape;
6) in the process of mechanical translation platform movement, laser displacement gauge measures the displacement of the free end of semi-girder, foil gauge gathers the force signal of semi-girder, and the force signal of the displacement measured and collection is transferred to computing machine simultaneously, obtains the force-displacement curve of tested fiber;
7) elastic modulus of tested fiber is calculated according to the force-displacement curve obtained, or the shear resistance of tested fiber and basal body interface.
Wherein, in step 1) in, the relation of the distortion of elastic modulus, tensile force f and semi-girder and the thickness of semi-girder meets:
wherein, y is the distortion of semi-girder, and F is pulling force, E
cfor the elastic modulus of semi-girder, W is the width of semi-girder, and h is the thickness of semi-girder, and l is the distance of stress point to the center of foil gauge.
In step 6) in, namely the displacement of the free end of semi-girder is the distortion of tested fiber, namely the pulling force be subject to of semi-girder is the pulling force suffered by tested fiber, therefore, obtain the displacement of the free end of the stressed of semi-girder and semi-girder, just obtain the force and deformation of tested fiber, by the pulling force of tested fiber and the force-displacement curve of the tested fiber of distortion drafting.
Advantage of the present utility model:
The utility model adopts semi-girder, one end of tested fiber is fixed, the other end is relative with the free end of semi-girder fixing, move semi-girder by mechanical translation platform, tested fiber is elongated, produce distortion to semi-girder reacting force simultaneously, by measuring the displacement of the stressed and free end of semi-girder, obtain the force-displacement curve of tested fiber, thus obtain the elastic modulus of tested fiber, or the shear resistance of tested fiber and basal body interface; The displacement of the stressed and free end of semi-girder can accurately record, thus the small power that also can obtain exactly suffered by tested fiber and microdeformation; Further, test component of the present utility model is semi-girder, and its test mode is easy, and little by space geometry constraint, test performance can keep good stability, so can meet the in-situ test requirement of varying environment under the environment such as various temperature, air pressure.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the micro-force test system based on semi-girder of the present utility model;
Fig. 2 is the schematic diagram of the semi-girder of the micro-force test system based on semi-girder of the present utility model;
Fig. 3 is the schematic diagram of the semi-girder distortion of the micro-force test system based on semi-girder of the present utility model;
Fig. 4 (a) is the force-displacement curve figure according to the tested fiber obtained based on micro-force test method of semi-girder of the present utility model, and (b) be the stress-strain curve of the stress and strain drafting according to the tested fiber obtained based on micro-force test method of semi-girder of the present utility model;
Fig. 5 is of the present utility model based on micro-force test system test aramid fiber of semi-girder and the schematic diagram of epoxy resin interface intensity;
Fig. 6 is according to the force-displacement curve figure obtained based on micro-force test method of semi-girder of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, by specific embodiment, set forth the utility model further.
As shown in Figure 1, the micro-force test system based on semi-girder of the present embodiment comprises: semi-girder 1, foil gauge 3, mechanical translation platform 6, laser displacement gauge 4, sample fixer 2, miniature inductive amplifier 5, data collecting card 8, motion control card 7 and computing machine 9; Wherein, one end of semi-girder 1 is fixed on mechanical translation platform 6, and the other end is free end; The surface distance stiff end 10mm place of semi-girder 1 arranges foil gauge 3, and as shown in Figure 2, foil gauge 3 is connected with miniature inductive amplifier 5, and miniature inductive amplifier 5 is connected with data collecting card 8, and data collecting card 8 is connected with computing machine 9; Mechanical translation platform 6 is connected with motion control card 7, and motion control card 7 is connected with computing machine 9; One end of tested fiber 0 is fixed on sample fixer 2, and the other end is arranged on the free end of semi-girder 1, fixes with free end relative position; Laser displacement gauge 4 aims at the end points that tested fiber is connected with the free end of semi-girder, and laser displacement gauge 4 is connected to computing machine 9.The free end of semi-girder 1 is provided with crack, and one end of tested fiber 0 is clipped in slit relative with the free end of semi-girder fixing.
Micro-force test method based on semi-girder of the present embodiment, comprises the following steps:
1) consult pertinent literature or tentative experiment, to obtain the scope of the elastic modulus of tested fiber and the shear resistance with basal body interface thereof, estimate tensile force f needed for experimentation, then the relation of distortion according to pulling force and semi-girder:
select the semi-girder being applicable to thickness, to ensure that the distortion y of semi-girder is not more than 10mm, wherein, y is the distortion of semi-girder, and F is pulling force, E
cfor the elastic modulus of semi-girder, W is the width of semi-girder, and h is the thickness of semi-girder, and l is the distance of stress point to foil gauge center.One end of semi-girder is fixed on mechanical translation platform, and the other end is free end, prepares to test.
2) prepare single tested fiber, one end is fixed on sample fixer, and the other end is arranged on the free end of semi-girder, fixes with free end relative position.
3) return to zero: computer controlled machine tool translation stage moves, and strains tested fiber gradually, foil gauge measures semi-girder stressed F, when F just greater than zero time, mechanical translation platform stops mobile, and now the stressed of semi-girder is set to zero.
4) travelling speed of the good mechanical translation platform of computer installation and distance, then starts test.
5) mechanical translation platform moves along the axial direction of tested fiber, and tested fiber under tension F is elongated, and tested fiber is to semi-girder reacting force F simultaneously, makes semi-girder stress deformation:
The stressed equal and opposite in direction of the pulling force suffered by tested fiber and semi-girder, is F, by the strain stress of foil gauge
cthe stressed F obtaining semi-girder is:
Wherein, E
cfor the elastic modulus of semi-girder, W is the width of semi-girder, and h is the thickness of semi-girder, and l is the distance of stress point to foil gauge center;
6) laser displacement gauge measures the displacement w of the free end of semi-girder, and foil gauge gathers the force signal of semi-girder, transfer to computing machine, obtain the force-displacement curve of tested fiber: simultaneously, the computing machine simultaneously displacement w of the free end of semi-girder that records of recording laser displacement meter as shown in Figure 3, the also axial deformation of i.e. tested fiber, the more stressed F of the tested fiber obtained according to formula (1), draw the force-displacement curve of tested fiber, as shown in Fig. 4 (a).In Fig. 3, the displacement of mechanical translation platform is d, meets d=w+y.
7) according to the elastic modulus of the tested fiber of calculating of the force-displacement curve obtained, or the shear resistance of tested fiber and basal body interface:
The elastic modulus of (a) tested fiber:
The stress σ strain stress of tested fiber can be calculated according to the diameter D of tested fiber and length L and force-displacement curve
f:
By the stress σ strain stress of the tested fiber obtained above
fdraw stress-strain curve, as shown in Fig. 4 (b), then obtain the elastic modulus E of tested fiber according to stress-strain curve
f,
B () is according to the maximum pull F of the force-displacement curve obtained
max, calculate the shear resistance τ of tested fiber and basal body interface:
Wherein, S is the area of tested fiber and basal body interface, S=π DH, and wherein, H is embedding length, F
maxdraw for maximum
Power.In continuous print dynamometry process, pulling force time tested fiber and basal body interface are just destroyed is maximum pull F
max.
As shown in Figure 5, for the droplet that aramid fiber and epoxy resin are made, aramid fiber is as tested fiber, the droplet that epoxy resin virtue parcel aramid fiber is made forms basal body interface, the length 50mm of aramid fiber 01, the diameter of aramid fiber 15 μm, the diameter of droplet 04 200 μm, the width of crack 02 40 μm, the translational speed 1mm/min of mechanical translation platform 6.03 is resin fixture block, and H is embedding length, the i.e. diameter of droplet 04.
By experiment, typical force-displacement curve is obtained, as shown in Figure 6.The result of shear resistance is as shown in table 1 below.
The shear resistance table of table 1 aramid fiber, epoxy resin combination interface
Unit: Mpa
The shear resistance of fiber and basal body interface, determines fibre reinforced composites bulk strength, and the shear resistance of research fiber and basal body interface is a requisite job.The utility model, not only only for testing the elastic modulus of single fiber, also may be used for other tests of single fiber.
It is finally noted that, the object publicizing and implementing example is to help to understand the utility model further, but it will be appreciated by those skilled in the art that: in the spirit and scope not departing from the utility model and appended claim, various substitutions and modifications are all possible.Therefore, the utility model should not be limited to the content disclosed in embodiment, and the scope that the claimed scope of the utility model defines with claims is as the criterion.
Claims (5)
1. the micro-force test system based on semi-girder, it is characterized in that, described micro-force test system comprises: semi-girder, foil gauge, mechanical translation platform, laser displacement gauge, sample fixer, miniature inductive amplifier, data collecting card, motion control card and computing machine; Wherein, one end of described semi-girder is fixed on mechanical translation platform, and the other end is free end; The surface of semi-girder arranges foil gauge, and described foil gauge is connected with miniature inductive amplifier, and miniature inductive amplifier is connected with data collecting card, and data collecting card is connected with computing machine; Described mechanical translation platform is connected with motion control card, and motion control card is connected with computing machine; One end of tested fiber is fixed on sample fixer, and the other end is arranged on the free end of semi-girder, fixes with free end relative position; Described laser displacement gauge aims at the end points that tested fiber is connected with the free end of semi-girder, and laser displacement gauge is connected to computing machine.
2. micro-force test system as claimed in claim 1, is characterized in that, the material of described semi-girder adopts steel disc.
3. micro-force test system as claimed in claim 1, is characterized in that, the thickness of described semi-girder is between 0.2 ~ 1mm.
4. micro-force test system as claimed in claim 3, is characterized in that, the relation between the distortion of elastic modulus, tensile force f and semi-girder and the thickness of semi-girder meets:
select the thickness of semi-girder, to ensure that the distortion y of semi-girder is not more than 10mm, wherein, y is the distortion of semi-girder, and F is pulling force, E
cfor the elastic modulus of semi-girder, W is the width of semi-girder, and h is the thickness of semi-girder, and l is the distance of stress point to the center of foil gauge.
5. micro-force test system as claimed in claim 1, is characterized in that, the free end of described semi-girder is provided with crack, and one end of tested fiber is clipped in slit relative with the free end of semi-girder fixing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520899601.0U CN205138897U (en) | 2015-11-12 | 2015-11-12 | Test system of doing all can a little based on cantilever beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520899601.0U CN205138897U (en) | 2015-11-12 | 2015-11-12 | Test system of doing all can a little based on cantilever beam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205138897U true CN205138897U (en) | 2016-04-06 |
Family
ID=55624679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520899601.0U Expired - Fee Related CN205138897U (en) | 2015-11-12 | 2015-11-12 | Test system of doing all can a little based on cantilever beam |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205138897U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021248171A1 (en) * | 2020-06-08 | 2021-12-16 | Technische Universität Wien | Method and device for preparing a tensile test |
| CN115184162A (en) * | 2022-09-09 | 2022-10-14 | 上海泽丰半导体科技有限公司 | Micro-nano-grade material elastic modulus detection equipment, detection method and detection system |
-
2015
- 2015-11-12 CN CN201520899601.0U patent/CN205138897U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021248171A1 (en) * | 2020-06-08 | 2021-12-16 | Technische Universität Wien | Method and device for preparing a tensile test |
| CN115184162A (en) * | 2022-09-09 | 2022-10-14 | 上海泽丰半导体科技有限公司 | Micro-nano-grade material elastic modulus detection equipment, detection method and detection system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105259039A (en) | Micro-force testing system based on cantilever beam and testing method of micro-force testing system | |
| Hardiman et al. | A review of key developments and pertinent issues in nanoindentation testing of fibre reinforced plastic microstructures | |
| CN102539233B (en) | Method for testing elastic modulus and strength of fiber materials and device thereof | |
| Fu et al. | Tension testing of polycarbonate at high strain rates | |
| CN105675420A (en) | Determination method of material's uniaxial stress-strain relation through spherical indentation prediction | |
| CN104122201A (en) | Device for measuring bond stress and slippage of reinforced concrete | |
| CN105784481A (en) | Method for acquiring uniaxial stress-strain relation of materials by disc specimen compression | |
| CN100561175C (en) | The method of ball-shape pressure head for determining shape memory alloy phase change property | |
| CN102323033A (en) | Device for testing normal dynamic characteristics of junction surface | |
| CN105675419A (en) | Determination method of material's uniaxial constitutive relation through biconical indentation prediction | |
| Liu et al. | CFRP lamella stay-cable and its force measurement based on microwave radar | |
| CN205138897U (en) | Test system of doing all can a little based on cantilever beam | |
| CN203658169U (en) | Semicircle bending strength tester for bituminous mixture | |
| CN105716946A (en) | Measuring method for predicting uniaxial constitutive relation of material by pressing cylindrical flat head in material | |
| Zhang et al. | Direct injection molding and mechanical properties of high strength steel/composite hybrids | |
| CN101650282B (en) | Method and device for measuring monofilament fiber compression performance | |
| Sanderson et al. | Use of a surface-mounted chirped fibre Bragg grating sensor to monitor delamination growth in a double-cantilever beam test | |
| CN105973703A (en) | Apparatus and method for detecting interfacial shear strength of composite material based on laser Raman spectrometer | |
| CN111551434B (en) | Method for testing axial compression performance of carbon fiber composite material and constitutive model | |
| Lodygowski et al. | Dry sliding friction experiments at elevated velocities | |
| CN103047939A (en) | Evaluating method for engineering applicability of fiber bragg grating strain sensor | |
| Chen et al. | Calibration technology of optical fiber strain sensor | |
| Walter et al. | A novel method for dynamic short-beam shear testing of 3D woven composites | |
| CN110472368A (en) | Simply supported beam damage recognition methods based on shearing and inclination effect line curvature | |
| CN202974770U (en) | Young modulus measurer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160406 Termination date: 20181112 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |