CN110763558A - Elastic modulus measuring method and measuring instrument - Google Patents
Elastic modulus measuring method and measuring instrument Download PDFInfo
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- CN110763558A CN110763558A CN201911061976.9A CN201911061976A CN110763558A CN 110763558 A CN110763558 A CN 110763558A CN 201911061976 A CN201911061976 A CN 201911061976A CN 110763558 A CN110763558 A CN 110763558A
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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
- G01N3/06—Special adaptations of indicating or recording means
- G01N3/066—Special adaptations of indicating or recording means with electrical indicating or recording means
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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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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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
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
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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
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
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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
- G01N2203/0075—Strain-stress relations or elastic constants
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses an elastic modulus measuring method and a measuring instrument, which relate to the field of measurement and comprise the steps of installing a deformation detection device to a test block; applying a deformation acting force to the test block through an experimental device, and obtaining the magnitude of the applied deformation acting force; measuring the deformation quantity of the test block under the action of a deformation acting force by a deformation detection device; based on the obtained deformation force and the deformation amount, the elastic modulus of the test block is calculated. Before measuring, at first install deformation detection device to the test block, later exert the deformation effort of specific size for the test block through experimental apparatus, utilize deformation detection device to measure the deformation volume of test block under this deformation effort, later according to the size of deformation effort and the deformation volume of measuring, just scattered the elastic modulus who obtains the test block, at the automatic measurement of measurement in-process, simple and convenient need not manual measurement, and the manual error is few.
Description
Technical Field
The invention relates to the field of measurement, in particular to a method and a device for measuring elastic modulus.
Background
Generally, an external force is applied to an elastic body, and the elastic body undergoes a shape change (referred to as "deformation"). The general definition of elastic modulus is: the stress in the unidirectional stress state is divided by the strain in that direction.
The elastic modulus is an important performance parameter of engineering materials, for example, in the field of concrete construction, concrete is bound to be subjected to material performance detection, and the elastic modulus of a concrete finished product is one of important indexes of detection.
When concrete is detected, generally, the concrete is manufactured into a concrete test block by using construction specifications, and then the elastic modulus of the test block is measured. When measuring the test block elastic modulus, a lot of surveyors utilize the dipperstick manual measurement, and the test is convenient and the human error appears easily inadequately.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the elastic modulus measuring method which has the advantages of simple and convenient test block measurement and less human errors.
In order to achieve the purpose, the invention provides the following technical scheme:
a method for measuring elastic modulus comprises
Mounting a deformation detection device to the test block;
applying a deformation acting force to the test block through an experimental device, and obtaining the magnitude of the applied deformation acting force;
measuring the deformation quantity of the test block under the action of a deformation acting force by a deformation detection device;
based on the obtained deformation force and the deformation amount, the elastic modulus of the test block is calculated.
Adopt above-mentioned technical scheme, before measuring, at first install deformation detection device to the test block, later exert the deformation effort of specific size for the test block through experimental apparatus, utilize deformation detection device to measure the deformation volume of test block under this deformation effort, later according to the size of deformation effort and the deformation volume of measuring, just scattered the elastic modulus who obtains the test block, at the automatic measurement of measurement in-process, it is simple and convenient, need not manual measurement, artifical error is few.
Further, mounting the deformation detecting device to the test block includes
Bonding two detection ends of the first deformation detection device on the positive detection surface of the test block through glue;
and bonding two detection ends of the second deformation detection device on the back detection surface of the test block through glue.
By adopting the technical scheme, the two deformation detection devices are arranged and are respectively arranged on the forward measurement surface and the reverse measurement surface of the test block, the tensile stress and the compressive stress of the test block are measured, the detection is more accurate, and the detection end is convenient to operate in a mode of bonding through glue.
Further, obtaining the magnitude of the applied deformation force comprises
And communicating with an experimental device or obtaining through man-machine interaction.
By adopting the technical scheme, the applied deformation acting force is directly obtained through communication with the experimental device, or the deformation acting force is obtained through a man-machine interaction mode, so that the elastic model is continuously measured when the experimental device does not support communication.
Aiming at the defects in the prior art, the invention aims to provide an elastic modulus measuring method and an elastic modulus measuring instrument, which have the advantages of simple and convenient test block measurement and less human errors.
In order to achieve the purpose, the invention provides the following technical scheme:
an elastic modulus measuring instrument comprises a measuring device for measuring deformation of a test block, and further comprises a processor and a memory, wherein the memory stores an instruction set for the processor to call so as to realize that:
obtaining the magnitude of deformation acting force applied to the test block by the experimental device;
obtaining the deformation quantity of the test block measured by the deformation detection device under the action of a deformation acting force;
and calculating the elastic modulus of the test block by a preset algorithm based on the obtained deformation acting force and deformation quantity.
Adopt above-mentioned technical scheme, before measuring, at first install deformation detection device to the test block, later exert the deformation effort of specific size for the test block through experimental apparatus, utilize deformation detection device to measure the deformation volume of test block under this deformation effort, later according to the size of deformation effort and the deformation volume of measuring, just scattered the elastic modulus who obtains the test block, at the automatic measurement of measurement in-process, it is simple and convenient, need not manual measurement, artifical error is few.
Further, deformation detection device includes the resistance ruler, and the dead lever is connected to the one end of resistance ruler, and the one end that the resistance ruler was kept away from to the dead lever is fixed with the detection end, and the telescopic link that is used for triggering the resistance ruler is connected to the other end of resistance ruler, and the one end of keeping away from the resistance ruler of telescopic link is fixed with another detection end.
Adopt above-mentioned technical scheme, when the installation, at first will pass through glue with the detection end that the dead lever links to each other and bond to the test block, fix dead lever and resistance ruler on the test block then, later will link to each other with the telescopic link detection end bond to the test block, accomplish deformation detection device's installation then, when detecting, deformation takes place for the test block, arouse the change of relative position between two detection ends, and then the telescopic link transmits the change volume to the resistance ruler, thereby turn into the deformation volume to the signal of telecommunication, the installation is simple and convenient, it is accurate to detect.
Furthermore, the deformation detection device is at least provided with two devices, one device is used for being bonded on the positive detection surface of the test block, and the other device is used for being bonded on the back detection surface of the test block.
By adopting the technical scheme, two deformation detection devices are arranged and are respectively arranged on the forward measurement surface and the reverse measurement surface of the test block, so that the tensile stress deformation and the compressive stress deformation of the test block are measured, and the detection is more accurate.
Further, the set of instructions also includes instructions for the processor to call to implement:
when a plurality of sets of deformation detection devices are arranged, the average value of the elastic modulus is calculated according to the detected deformation quantities.
By adopting the technical scheme, the average value of the elastic modulus is calculated by detecting a plurality of deformation data, so that the detection precision is further enhanced.
Further, the system also comprises an interactive panel for carrying out interactive operation.
By adopting the technical scheme, the interactive panel is convenient for inputting the magnitude of the deformation acting force and carrying out operation control.
In conclusion, the invention has the following beneficial effects:
1. the deformation amount of the test block under the deformation acting force is measured by using a deformation detection device, and then the elastic modulus of the test block is scattered according to the magnitude of the deformation acting force and the measured deformation amount, so that the automatic measurement is realized in the measuring process, the simplicity and convenience are realized, the manual measurement is not needed, and the manual error is less;
2. the test block deforms to cause the change of the relative position between the two detection ends, and the telescopic rod transmits the variable quantity to the resistance ruler, so that the deformation quantity is converted into an electric signal, and the detection is accurate;
3. the two deformation detection devices are arranged and are respectively arranged on the forward measurement surface and the reverse measurement surface of the test block, so that the tensile stress deformation and the compressive stress deformation of the test block are measured, and the detection is more accurate.
Drawings
FIG. 1 is a schematic flow chart of the method for measuring elastic modulus of the present invention;
FIG. 2 is a schematic diagram of the use of the elastic modulus measuring instrument of the present invention;
FIG. 3 is a schematic diagram of a main machine of the elastic modulus measuring apparatus of the present invention.
In the figure: 1. testing blocks; 2. a forward detection surface; 3. a back side of the detection surface; 3. fixing the rod; 4. a resistance ruler; 41. a data line; 5. a telescopic rod; 6. detecting an end head; 7. an interactive panel; 8. deformation detection device.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and examples.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Example 1
A method for measuring elastic modulus, referring to fig. 1, includes steps S101 to S104.
S101: the deformation detecting device 8 is attached to the test block 1.
Mounting the deformation detecting device 8 to the test block 1 includes: bonding two detection ends 6 of a first deformation detection device 8 on the positive detection surface 2 of the test block 1 through glue; two detection ends 6 of the second deformation detection device 8 are bonded on the back detection surface 3 of the test block 1 through glue.
S102: and applying deformation acting force to the test block 1 through an experimental device, and obtaining the magnitude of the applied deformation acting force.
The test device refers to a kind of equipment which can apply deformation acting force to the test block 1 quantitatively, and in the example, the test device refers to a universal test machine. Obtaining the magnitude of the applied deformation force comprises communicating with an experimental device or obtaining the magnitude through human-computer interaction.
S103: the deformation amount of the test block 1 under the action of the deformation acting force is measured by a deformation detection device 8.
After the test apparatus applies a set deformation force to the test block 1, the deformation amount of the test block 1 at this time is detected by the already mounted deformation detecting apparatus 8.
S104: based on the obtained deformation force and the amount of deformation, the elastic modulus of the test block 1 is calculated.
Then, the elastic modulus of the test block 1 is calculated by a preset algorithm using the obtained magnitude of the deformation acting force and the deformation amount. Automatic measurement in the measurement process, simple and convenient, need not manual measurement, the manual error is few.
Example 2
An elastic modulus measuring instrument, referring to fig. 2, comprises a measuring device for measuring the deformation of a test block 1, and further comprises a processor and a memory, wherein the memory stores an instruction set for the processor to call to realize:
obtaining the magnitude of deformation acting force applied by the experimental device to the test block 1;
obtaining the deformation quantity of the test block 1 under the action of the deformation acting force, which is measured by a deformation detection device 8;
based on the obtained deformation acting force and deformation amount, the elastic modulus of the test block 1 is calculated by a preset algorithm.
Wherein, deformation detection device 8 includes resistance ruler 4, and dead lever 3 is connected to the one end of resistance ruler 4, and the one end that resistance ruler 4 was kept away from to dead lever 3 is fixed with detection end 6, and the telescopic link 5 that is used for triggering resistance ruler 4 is connected to the other end of resistance ruler 4, and the one end of keeping away from resistance ruler 4 of telescopic link 5 is fixed with another detection end 6. In this embodiment, the detection end 6 is a bolt, and the bolt is connected with the telescopic rod 5 and the fixing rod 3 through threads, so that the installation and the disassembly are convenient.
The deformation detection device 8 is at least provided with two, and two are taken as examples in the embodiment, one is used for being bonded on the forward detection surface 2 of the test block 1, the other is used for being bonded on the back detection surface 3 of the test block 1, and the two are used for respectively detecting the compressive stress deformation and the tensile stress deformation, so that the detection precision is enhanced.
When a plurality of sets of deformation detecting devices 8 are arranged, the average value of the elastic modulus is calculated according to the detected deformation amounts so as to improve the detection accuracy.
Referring to fig. 3, a data line 41 is connected to and communicates with a host in which both the processor and the memory are disposed, and an interactive panel 7 for performing an interactive operation is further provided.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (8)
1. A method for measuring elastic modulus is characterized in that: comprises that
Mounting a deformation detection device (8) to the test block (1);
applying a deformation acting force to the test block (1) through an experimental device, and obtaining the magnitude of the applied deformation acting force;
measuring the deformation quantity of the test block (1) under the action of the deformation action force through a deformation detection device (8);
based on the obtained deformation force and the amount of deformation, the elastic modulus of the test block (1) is calculated.
2. The elastic modulus measuring method according to claim 1, characterized in that: mounting a deformation detection device (8) to a test block (1) comprises
Bonding two detection ends (6) of a first deformation detection device (8) on a positive detection surface (2) of a test block (1) through glue;
and bonding two detection ends (6) of the second deformation detection device (8) on the back detection surface (3) of the test block (1) through glue.
3. The elastic modulus measuring method according to claim 1, characterized in that: obtaining the magnitude of the applied deformation force comprises
And communicating with an experimental device or obtaining through man-machine interaction.
4. An elasticity modulus measuring instrument, characterized in that: the device comprises a measuring device for measuring the deformation of the test block (1), and further comprises a processor and a memory, wherein the memory stores an instruction set for the processor to call so as to realize that:
obtaining the magnitude of deformation acting force applied to the test block (1) by the experimental device;
obtaining the deformation quantity of the test block (1) measured by the deformation detection device (8) under the action of the deformation action force;
and calculating the elastic modulus of the test block (1) by a preset algorithm based on the obtained deformation acting force and deformation quantity.
5. The elastic modulus measuring instrument according to claim 4, wherein: deformation detection device (8) include resistance ruler (4), and dead lever (3) are connected to the one end of resistance ruler (4), and the one end of keeping away from resistance ruler (4) in dead lever (3) is fixed with detection end (6), and telescopic link (5) that are used for triggering resistance ruler (4) are connected to the other end of resistance ruler (4), and the one end of keeping away from resistance ruler (4) of telescopic link (5) is fixed with another detection end (6).
6. The elastic modulus measuring instrument according to claim 5, wherein: the deformation detection device (8) is at least provided with two parts, one part is used for being adhered to the forward detection surface (2) of the test block (1), and the other part is used for being adhered to the backward detection surface (3) of the test block (1).
7. The elastic modulus measuring instrument according to claim 3, wherein: the instruction set further includes instructions for the processor to call to implement:
when a plurality of sets of deformation detecting devices (8) are arranged, the average value of the elastic modulus is calculated according to the detected deformation quantities.
8. The elastic modulus measuring instrument according to claim 4, wherein: and the system also comprises an interaction panel (7) for carrying out interaction operation.
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| CN201911061976.9A CN110763558A (en) | 2019-11-01 | 2019-11-01 | Elastic modulus measuring method and measuring instrument |
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| CN201911061976.9A CN110763558A (en) | 2019-11-01 | 2019-11-01 | Elastic modulus measuring method and measuring instrument |
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| CN110763558A true CN110763558A (en) | 2020-02-07 |
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