CN108020464A - A kind of method with strain brick calibration analog material uniform level - Google Patents
A kind of method with strain brick calibration analog material uniform level Download PDFInfo
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- CN108020464A CN108020464A CN201711096342.8A CN201711096342A CN108020464A CN 108020464 A CN108020464 A CN 108020464A CN 201711096342 A CN201711096342 A CN 201711096342A CN 108020464 A CN108020464 A CN 108020464A
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- strain
- analog material
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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
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/30—Measuring arrangements characterised by the use of mechanical techniques for measuring the deformation in a solid, e.g. mechanical strain gauge
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- General Physics & Mathematics (AREA)
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- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
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- General Health & Medical Sciences (AREA)
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
A kind of method with strain brick calibration analog material uniform level, the equipment used in it include some groups of strain bricks, plane stress testing stand and strain monitoring system, and every group of strain brick is made of several strain bricks；It is demarcated the method for analog material uniform level and includes the following steps：Step 1, layering is laid with；Step 2, each strain brick is all electrically connected with strain monitoring system, and the primary data of each strain brick is reset；Step 3, each layer analog material is tamped, and each size for straining microstrain ε on brick in during every layer of analog material to needing laying strain brick is tamped in real time by this layer of analog material of strain monitoring system monitoring, on each strain brick microstrain ε it is equal in magnitude when, it was demonstrated that this layer of analog material uniform level is consistent；Step 4, by analog material according to above-mentioned 3 steps successively, order be laid with and complete, until being laid with to similar material model design height.Solve the problems, such as that analog material uniform level during artificial compacting is low.
Description
Technical field
The present invention relates to similar material simulation experiment field, particularly analog material is laid on plane stress testing stand, its
A kind of method of calibration analog material uniform level during compacting.
Background technology
Similar material simulation experiment be one kind can be used for more true simulation seam mining during sand coated iron mold and
A kind of research method of the characteristics of motion, face surrounding rock displacement and change of stress field, compared with field measurement, equivalent material simulating
Experiment is more convenient, and experiment is time-consuming short, and cost is low, can targetedly be studied for a certain mechanism, while can also
Sand coated iron mold, the change procedure of surrouding rock stress when dynamically reflecting seam mining.Similar material simulation experiment is mainly by scene
The physical and mechanical parameter of coal and rock substitutes it with analog material according to the theory of similarity, while live prototype is contracted by a certain percentage
It is small, ensure that the initial conditions of Equivalent Materials Testing are similar with the boundary condition of prototype, carry out simulated experiment on this basis,
Finally simulated experiment is reverted back a kind of scientific and effective method at scene.
At present, it is domestic mainly to have plane stress testing stand using the equipment for carrying out equivalent material simulating, by analog material body
Even laminating is laid in plane stress testing stand, is needed during the layering of analog material body is laid with to every layer of analog material
Tamped, but during artificial compacting, can not ensure every layer of analog material body compacting degree all same, and tamp journey
The different physico-mechanical propertieses that can seriously affect same analog material body are spent, cause same layer analog material density, porosity, mechanics
The parameters such as property lack homogeneity, seriously affect the reliability and validity of Equivalent Materials Testing.
Therefore, research is a kind of can demarcate the whether consistent method of analog material uniform level, be that current urgent need solves
Technical problem.
The content of the invention
In view of the drawbacks described above of the prior art, the technical problems to be solved by the invention are to provide a kind of similar for demarcating
The method of material uniform level.
To achieve the above object, the present invention provides it is a kind of with strain brick calibration analog material uniform level method, its
Equipment used includes some groups of strain bricks, plane stress testing stand and strain monitoring system, and every group of strain brick is by several
Strain brick composition；
It is demarcated the method for analog material uniform level and includes the following steps：
Step 1：Layering is laid with：Analog material is layered, is uniformly layed in plane stress test-bed, being built into has
The analog material body of some layerings, and during analog material is laid with, spread in each layer analog material for needing to be laid with strain brick
If during, several strain bricks are equidistantly laid in this layer of analog material by each layer successively；
Step 2：Connection monitoring, reset：By be laid with strain brick every layer of analog material in each strain brick all with strain
Monitoring system is electrically connected, and opens strain monitoring system and laying is strained to the first of each strain brick in every layer of analog material of brick
Beginning zeros data；
Step 3：Monitor and tamp in real time：Each layer analog material, and need to be laid with every layer of analog material of strain brick
Several strain bricks lay after, each layer analog material is tamped, and similar to needing to be laid with strain every layer of brick
Material compacting during in real time by this layer of analog material of strain monitoring system monitoring it is each strain brick on microstrain ε it is big
It is small, judge whether the uniform level at this layer of analog material diverse location is consistent by each microstrain ε sizes, each strain brick
Upper microstrain ε it is equal in magnitude when, it was demonstrated that this layer of analog material uniform level is consistent；
Step 4：By analog material according to above-mentioned 3 steps successively, order be laid with and complete, until being laid with to analog material mould
Type design height.
Strain monitoring system of the present invention is made of high-speed static/dynamic strain indicator and calculating mechatronics, above-mentioned steps 2
In, each strain brick being laid with every layer of analog material of strain brick is all electrically connected with high-speed static/dynamic strain indicator.
The beneficial effects of the invention are as follows：
(1) microstrain is obvious in the case of compression in itself for strain brick in the method, and sensitivity and accuracy are higher, and data are easy
In measuring, strain size can be monitored in real time during analog material compacting；
(2) size of brick microstrain is strained by monitoring diverse location in analog material in real time, to judge analog material not
It is whether consistent with position compacting uniform level.When each position strain brick microstrain it is equal in magnitude when, can determine that similar material
The compacting degree of material is identical；
(3) the method cost is relatively low, and operability is high, can quickly judge to be laid with analog material body during compacting
Compacting homogeneity, not only ensure that analog material body had identical compacting degree but also saves the time.
In short, this method ensure that the uniformity of analog material body compacting degree, Equivalent Materials Testing is improved
Reliability, accuracy is higher, easy to operate, and cost is relatively low.
Brief description of the drawings
Every strain brick structure schematic diagram of Fig. 1 present invention；
Fig. 2 demarcates the working state schematic representation of analog material uniform level.
Embodiment
The invention will be further described with reference to the accompanying drawings and examples：
As shown in Figure 1, 2, a kind of method with strain brick calibration analog material uniform level, it is characterised in that：Used
Equipment includes some groups of strain bricks, plane stress testing stand 4 and strain monitoring system, and every group of strain brick is by several strain bricks
1 composition；
It is demarcated the method for analog material uniform level and includes the following steps：
Step 1：Layering is laid with：Analog material is layered, is uniformly layed in 4 frame of plane stress testing stand, is built into tool
There is the analog material body 2 of some layerings, and during analog material is laid with, needing to be laid with each layer analog material for straining brick
In process of deployment, several strain bricks 1 are equidistantly laid in this layer of analog material by each layer successively；
Step 2：Connection monitoring, reset：By be laid with strain brick every layer of analog material in each strain brick 1 all with strain
Monitoring system is electrically connected, and opens strain monitoring system and laying is strained to each strain brick 1 in every layer of analog material of brick
Primary data is reset；
Step 3：Monitor and tamp in real time：Each layer analog material, and need to be laid with every layer of analog material of strain brick
Several strain bricks 1 lay after, each layer analog material is tamped, and similar to needing to be laid with strain every layer of brick
Material compacting during in real time by this layer of analog material of strain monitoring system monitoring it is each strain brick 1 on microstrain ε it is big
It is small, judge whether the uniform level at this layer of analog material diverse location is consistent by each microstrain ε sizes, each strain brick
On 1 microstrain ε it is equal in magnitude when, it was demonstrated that this layer of analog material uniform level is consistent；
Step 4：By analog material according to above-mentioned 3 steps successively, order be laid with and complete, until being laid with to analog material mould
Type design height.
In the present embodiment, each brick 1 that strains is length of side 30mm squares, and plane stress testing stand 4 grows × and width is 2500mm
×180mm.In other embodiments, according to specific actual requirement, strain brick 1 and plane stress test platform is alternatively
Other sizes, to reach essentially identical technique effect.
As shown in Figure 1, 2, the strain monitoring system is electrically connected by high-speed static/dynamic strain indicator 3 and computer 5 and formed,
In above-mentioned steps 2, each strain brick 1 being laid with every layer of analog material of strain brick is all electrically connected with high-speed static/dynamic strain indicator 3
Connect.Each strain brick 1 is made of polyurethane block 7 and foil gauge 6, and foil gauge 6 is pasted onto the side of polyurethane block 7 all around
On, the exposed face of the side and foil gauge 6 is coated with silica gel.The data lead of each strain 1 foil gauge 6 of brick and strain monitoring system
High-speed static/dynamic strain indicator 3 of system is electrically connected.
It is only that the preferred embodiment of the present invention is described in detail above, not the scope of the present invention is carried out
Limit；It should be appreciated that those of ordinary skill in the art can conceive according to the present invention without creative work, to this hair
Many modification and improvement that bright technical solution is made, should all fall into determined by claims of the present invention in protection domain.
Claims (2)
- A kind of 1. method with strain brick calibration analog material uniform level, it is characterised in that：Equipment used includes some Group strain brick, plane stress testing stand (4) and strain monitoring system, every group of strain brick are made of several strain bricks (1)；It is demarcated the method for analog material uniform level and includes the following steps：Step 1：Layering is laid with：Analog material is layered, is uniformly layed in plane stress testing stand (4) frame, being built into has The analog material body (2) of some layerings, and during analog material is laid with, needing to be laid with each layer analog material for straining brick In process of deployment, several strain bricks (1) are equidistantly laid in this layer of analog material by each layer successively；Step 2：Connection monitoring, reset：The each strain brick (1) being laid with every layer of analog material of strain brick is all supervised with strain Examining system is electrically connected, and opens strain monitoring system and laying is strained to each strain brick (1) in every layer of analog material of brick Primary data is reset；Step 3：Monitor and tamp in real time：Each layer analog material, and if needing to be laid with every layer of analog material of strain brick After a dry strain brick (1) is laid, each layer analog material is tamped, and to needing to be laid with every layer of similar material for straining brick During material compacting in real time by this layer of analog material of strain monitoring system monitoring on each strain brick (1) microstrain ε it is big It is small, judge whether the uniform level at this layer of analog material diverse location is consistent by each microstrain ε sizes, each strain brick (1) on microstrain ε it is equal in magnitude when, it was demonstrated that this layer of analog material uniform level is consistent；Step 4：By analog material according to above-mentioned 3 steps successively, order be laid with and complete, set until being laid with to similar material model Meter height.
- A kind of 2. method with strain brick calibration analog material uniform level according to claim 1, it is characterised in that：It is described Strain monitoring system is electrically connected by high-speed static/dynamic strain indicator (3) and computer (5) and formed, and in above-mentioned steps 2, is laid with strain Each strain brick (1) in every layer of analog material of brick is all electrically connected with high-speed static/dynamic strain indicator (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711096342.8A CN108020464B (en) | 2017-10-24 | 2017-10-24 | Method for calibrating uniformity degree of similar materials by using strain bricks |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711096342.8A CN108020464B (en) | 2017-10-24 | 2017-10-24 | Method for calibrating uniformity degree of similar materials by using strain bricks |
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| Publication Number | Publication Date |
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| CN108020464A true CN108020464A (en) | 2018-05-11 |
| CN108020464B CN108020464B (en) | 2020-04-21 |
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|---|---|---|---|
| CN201711096342.8A Expired - Fee Related CN108020464B (en) | 2017-10-24 | 2017-10-24 | Method for calibrating uniformity degree of similar materials by using strain bricks |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111811938A (en) * | 2020-07-21 | 2020-10-23 | 重庆大学 | Strain brick and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1584621A (en) * | 2004-05-28 | 2005-02-23 | 清华大学 | Horizontal magnetic coupler mechanical loading and measuring systems |
| CN102147301A (en) * | 2010-12-28 | 2011-08-10 | 湖南大学 | Nondestructive testing method of hard alloy anvil |
| CN104483446A (en) * | 2014-10-28 | 2015-04-01 | 山东大学 | Method for filling fractures and monitoring element burying in underground engineering model test |
| CN105259334A (en) * | 2015-11-28 | 2016-01-20 | 中国科学院武汉岩土力学研究所 | Multi-functional large-scale physical model pouring and loading test device |
| CN106198235A (en) * | 2016-08-25 | 2016-12-07 | 安徽理工大学 | Blasting simulation test device and method based on geomechanical model test |
-
2017
- 2017-10-24 CN CN201711096342.8A patent/CN108020464B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1584621A (en) * | 2004-05-28 | 2005-02-23 | 清华大学 | Horizontal magnetic coupler mechanical loading and measuring systems |
| CN102147301A (en) * | 2010-12-28 | 2011-08-10 | 湖南大学 | Nondestructive testing method of hard alloy anvil |
| CN104483446A (en) * | 2014-10-28 | 2015-04-01 | 山东大学 | Method for filling fractures and monitoring element burying in underground engineering model test |
| CN105259334A (en) * | 2015-11-28 | 2016-01-20 | 中国科学院武汉岩土力学研究所 | Multi-functional large-scale physical model pouring and loading test device |
| CN106198235A (en) * | 2016-08-25 | 2016-12-07 | 安徽理工大学 | Blasting simulation test device and method based on geomechanical model test |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111811938A (en) * | 2020-07-21 | 2020-10-23 | 重庆大学 | Strain brick and preparation method thereof |
| CN111811938B (en) * | 2020-07-21 | 2022-09-20 | 重庆大学 | Strain brick and preparation method thereof |
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| Publication number | Publication date |
|---|---|
| CN108020464B (en) | 2020-04-21 |
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Granted publication date: 20200421 Termination date: 20201024 |