Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Material strain-hardness relation detection method

A detection method and hardness testing technology, applied in the direction of testing material hardness, analyzing materials, measuring devices, etc., can solve problems such as insufficient accuracy, and achieve the effect of accurate strain-hardness relationship

Active Publication Date: 2021-08-06
SHANGHAI JIAO TONG UNIV +1
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the determination method based on finite element simulation is not accurate enough

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 more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Material strain-hardness relation detection method
  • Material strain-hardness relation detection method
  • Material strain-hardness relation detection method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] Such as figure 1 Shown in (a)~(c), it is a kind of sample to be tested that this embodiment relates to, and the measuring method of its strain-hardness relation specifically comprises:

[0025] The first step is to prepare the sample to be tested: use 20MnMoB as the material to prepare an incomplete cylinder with a diameter of 20mm and a height of 30mm. The central axis is 5 mm; four hemispherical pits are further arranged on the plane, and the four pits are symmetrically distributed around the center of the plane; the diameter of the hemispherical pits is 5 mm, and the length and width distances between the hemispherical pits are both 10 mm.

[0026] The second step, surface spraying treatment: spray paint on the side plane of the sample with spherical pits obtained in the first step, spray white paint first, and then spray black paint after the white paint is dry, to ensure the plane outside the spherical pits Uniform spraying to ensure complete and accurate capture ...

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

PropertyMeasurementUnit
diameteraaaaaaaaaa
heightaaaaaaaaaa
Login to View More

Abstract

The invention relates to a material strain-hardness relation detection method, which comprises the following steps: carrying out paint spraying treatment on an axial side plane with a spherical pit of a semi-tubular sample by utilizing a to-be-detected sample capable of obtaining large strain, vertically placing the semi-tubular sample subjected to paint spraying at the centers of an upper die and a lower die, and performing extruding from top to bottom to generate compression deformation, acquiring strain in-situ measurement data by acquiring a deformation image during deformation; cutting the compressed and deformed semi-tubular sample, embedding the cut semi-tubular sample into phenolic resin for hardness testing, and correcting and fitting hardness data to obtain a strain-hardness relationship. The strain distribution of the sample is measured in real time by combining a digital image technology, the surface hardness distribution of the deformed sample is directly measured, and the strain-hardness relationship of the material is determined on the basis of the measured strain and hardness data.

Description

technical field [0001] The invention relates to a technology in the field of material detection, in particular to a method for detecting material strain-hardness relationship. Background technique [0002] For precision parts manufactured by large plastic deformation process, the hardness after forming is generally used as an important inspection index for its performance. The determination of the material strain-hardness relationship can predict the hardness of the deformed part, thereby guiding the design of the part and its plastic deformation process. At present, the determination method based on finite element simulation is not accurate enough. Contents of the invention [0003] Aiming at the above-mentioned deficiencies in the prior art, the present invention proposes a material strain-hardness relationship detection method, which utilizes a sample to be tested that can obtain a large strain, combines digital image technology to measure the strain distribution of th...

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
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/40G01N3/02
CPCG01N3/40G01N3/02
Inventor 胡成亮卓悦胡誉曹民业刘红宇
Owner SHANGHAI JIAO TONG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com