Rapid measurement method of internal stress distribution based on wedge structure and error correction method thereof
A measurement method and error correction technology, applied in the field of measurement, can solve problems such as low efficiency, cumbersome measurement operations, and low data resolution, and achieve the effects of high measurement efficiency, simplified measurement process, and improved resolution
Inactive Publication Date: 2010-07-21
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
View PDF0 Cites 4 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] Aiming at the problems of cumbersome measurement operation, low efficiency, and low data resolution of the uniform stress distribution of the blank, the present invention proposes a fast measurement of internal stress distribution and its error correction method based on the wedge structure, which has the advantages of simple operation, high measurement efficiency and The data resolution can reach tens of microns, which is suitable for the rapid measurement of the internal stress of the blank
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
Embodiment Construction
[0023] Below in conjunction with accompanying drawing, the technical scheme of invention is described in detail:
[0024] The invention relates to a fast measurement of internal stress distribution based on a wedge structure and an error correction method thereof. The low-surface deformation curve is measured after the blank is processed into a wedge structure, and the internal stress distribution of the blank is calculated from the deformation curve. The error correction of this method by numerical method can obtain higher measurement accuracy. Specific implementations of the methods involved in the present invention will now be described in detail.
[0025] figure 1 It is a preferred implementation process of the fast measurement of internal stress distribution and its error correction method based on the wedge structure of the present invention.
[0026] Step 101: if figure 2 As shown, the blank length direction sample 2 and the blank width direction sample 3 are cut fr...
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 |
|---|---|---|
| width | aaaaa | aaaaa |
Login to View More
Abstract
The invention discloses a rapid measurement method of internal stress distribution based on wedge structure and an error correction method, belonging to the technical field of measurement. The rapid measurement method comprises the following steps of processing a blank into the wedge structure, then measuring a deformation curve of the lower surface, and finally, calculating the internal stress distribution of the blank according to the deformation curve. The error correction is carried out on the rapid measurement method by a numerical method, so that higher measurement precision can be obtained.
Description
technical field [0001] The invention relates to a fast measurement of internal stress distribution based on a wedge structure and an error correction method thereof, belonging to the technical field of measurement. Background technique [0002] The internal stress of the blank will be gradually released with the continuous cutting of the material during the process of cutting the blank into parts, and the resulting internal stress will be unbalanced, which will lead to deformation of the parts after processing. In order to study and control the processing deformation, the internal stress of the blank must be measured to obtain the internal stress distribution of the blank. There are many methods for measuring residual stress, which can be divided into two categories according to different measurement principles: measurement methods based on physical properties of materials and measurement methods based on material removal. The former includes x-ray method, ultrasonic method...
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 Applications(China)
IPC IPC(8): G01L1/24G01B11/16
Inventor 杨吟飞何宁李亮赵威陈玲玲史琦
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS