3D printing photoelastic material and method for simulating buckling stress distribution after loading
A photoelastic material and 3D printing technology, which is applied in the measurement, additive processing, and force measurement of the change in optical properties of the material when it is stressed, can solve problems such as coal mine outburst accidents, coal and gas outbursts, etc. , to achieve the effect of improving precision, accurate results and high practical value
Active Publication Date: 2020-01-14
CHINA UNIV OF MINING & TECH (BEIJING)
View PDF12 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Many literatures have shown that the complex stress field at the folds may lead to coal and gas outbursts, resulting in coal mine outburst accidents
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
specific Embodiment approach
[0037] A method of exploring the stress of folds in geological structures based on photoelastic materials of the present invention, its preferred specific implementation is as follows:
[0038] The present invention provides a 3D printing photoelastic material, which includes: a first sample layer, a second sample layer and a third sample layer, which are fastened and connected sequentially by means of glue connection;
[0039] The structural properties of the first test piece layer, the second test piece layer and the third test piece layer are respectively matched with the rock samples or coal samples; wherein, the matching criterion is: the first test piece layer , the uniaxial compressive strength, tensile strength, modulus of elasticity, Poisson's ratio and density of the second test piece layer and the third test piece layer, and the uniaxial compressive strength, tensile strength and tensile strength of the rock sample or coal sample The strength, elastic modulus, Poiss...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| length | aaaaa | aaaaa |
| width | aaaaa | aaaaa |
| thickness | aaaaa | aaaaa |
Login to View More
Abstract
The present invention discloses 3D printing photoelastic materials and a method for simulation of fold stress distribution after loading. The objective of the invention is to research stress distribution of a wrinkle fold portion. The 3D printing photoelastic materials comprise a first test piece layer, a second test piece layer and a third test piece layer which are fixedly connected in order ina gluing mode and matched with rock samples or fire coal samples; the matching standard is that: uniaxial compressive strengths, strengths of extension, elasticity moduli, Poisson's ratios and densities of the test piece layers are compared to the rock or coal samples to obtain basic parameters and a mean value, each basic parameter and the mean value are subjected to difference, three minimum differences are taken as selected values, and if difference between each two of the three selected values is not larger than 20%, it is determined that current photosensitive resin is the closest to therock or fire coal data. The technology provided by the invention employs two photoelastic materials as raw materials to simulate upper and lower portions of rock layers and the middle coal seam of thewrinkle portion. The photoelastic measurement method is employed to measure a stress filed at a fold to have an active effect on prevention of coal and gas outburst accidents at the fold.
Description
technical field [0001] The invention relates to a method for preparing a 3D photoelastic experiment specimen, in particular to a 3D printing photoelastic material and a method for simulating the distribution of fold stress after loading. Background technique [0002] Since David Brewster discovered the temporary birefringence phenomenon of transparent media under the action of stress in the eighteenth century, after 200 years of development, photoelasticity has been quite perfect and has become a very effective means of mechanical analysis. This method is a full-field stress measurement method, which has the characteristics of strong intuition and high reliability, and is especially beneficial for analyzing the stress field of complex components, and has been widely used in construction, machinery and other fields. [0003] Fold is a very common geological structure in the earth's crust. Its formation is mainly due to the permanent bending deformation of the rock due to the...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01L1/24B33Y80/00
CPCB33Y80/00G01L1/241
Inventor 郭德勇姜锡慧单奕铭
Owner CHINA UNIV OF MINING & TECH (BEIJING)