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

Calculation method for steady creep rate fitting equation of metal material

A technique for steady-state creep and fitting equations, which is used in calculations, computer-aided design, design optimization/simulation, etc. It can solve problems that affect the accuracy of the steady-state creep rate fitting equation results, and the hyperbolic sine model cannot be accurately fitted. It can solve the problems of combined creep rate and inability to calculate the steady-state creep rate of materials, so as to achieve the effect of improving applicability and accuracy, good fitting degree, and reducing the influence of creep rate.

Active Publication Date: 2017-02-22
RES INST OF PHYSICAL & CHEM ENG OF NUCLEAR IND
View PDF5 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing prediction methods mainly have the following three problems: (1) Since the steady-state creep rate is greatly affected by temperature and stress load, once the creep mechanism of the material changes, the hyperbolic sine model based on the creep mechanism may not be able to Accurately fit the creep rate over a wide range of experimental conditions, thereby affecting the accuracy of the results of the steady-state creep rate fitting equation
(2) Affected by subjective factors, the isothermal linear extrapolation method has low accuracy and has great limitations
(3) Although the time-temperature parameter method has a wide range of applications, this method can only calculate the durability of the material, and cannot calculate the steady-state creep rate of the material

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
  • Calculation method for steady creep rate fitting equation of metal material
  • Calculation method for steady creep rate fitting equation of metal material
  • Calculation method for steady creep rate fitting equation of metal material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] The high-strength aluminum alloy 7075 aluminum alloy plate (T6 state) was selected as the research object, and the sampling direction of the creep sample was the short transverse direction in the plate (perpendicular to the extrusion direction of the extruded plate), and the sample size referred to GB / T 2039-1997 "Metal Tensile Creep and Endurance Test Methods". The experimental temperature levels were 34.4°C, 99.4°C, and 148.9°C respectively, and a total of 31 effective creep data were obtained. For the data distribution, see figure 2 .

[0059] (i) The steady-state creep rate and durable rupture time of the 7075 aluminum alloy samples at different temperatures are marked in On a log-log plot, such as image 3 shown. Calculated by linear fitting The fitted straight line expression of , where the linear fit R 2 =0.941, the fitting situation is as follows image 3 shown;

[0060] (ii) According to the Monkman-Grant relationship, using the steady-state creep r...

Embodiment 2

[0072] The high-strength aluminum alloy 7075 aluminum alloy plate (T6 state) was selected as the research object, and the sampling direction of the creep sample was the short transverse direction in the plate (perpendicular to the extrusion direction of the extruded plate), and the sample size referred to GB / T 2039-1997 "Metal Tensile Creep and Endurance Test Methods". The experimental temperature levels were 34.4°C, 99.4°C, and 148.9°C respectively, and a total of 31 effective creep data were obtained. For the data distribution, see figure 2 .

[0073] (i) The steady-state creep rate and durable rupture time of the 7075 aluminum alloy samples at different temperatures are marked in On a log-log plot, such as image 3 shown. Calculated by linear fitting The fitted straight line expression of , where the linear fit R 2 =0.941, the fitting situation is as follows image 3 shown.

[0074] (ii) According to the Monkman-Grant relationship, using the steady-state creep r...

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

No PUM Login to View More

Abstract

The invention discloses a calculation method for a steady creep rate fitting equation of a metal material. The method comprises the following steps that 1, a Monkman-Grant relation for the creep durability of the material is verified; 2, a time-temperature parameter is corrected into a rate-temperature parameter; 3, the form of a main curve P(sigma) is selected; 4, fitting is conducted on unknown constant terms in a rate-temperature parameter model; 5, the steady creep rate fitting equation of the material is established. According to the method, the problem that the steady creep rate cannot be calculated through a traditional time-temperature parameter is solved, and application in reliability design and optimization of equipment components is wider; the steady creep rate in the wide experimental condition range can be fitted, influences of creep mechanism changes on the creep rate are reduced, the applicability and the accuracy of the steady creep rate fitting equation of the material are improved, and a universal study and application value is achieved.

Description

technical field [0001] The invention belongs to a calculation method for a metal material steady-state creep rate fitting equation, in particular to a calculation method for a metal material steady-state creep rate fitting equation based on a rate temperature parameter model. Background technique [0002] In the energy, aerospace, petrochemical and other industrial fields, the creep performance and life evaluation technology of metal materials is an important link to ensure the safe operation of material components and avoid waste of resources. Especially when the design conditions require metal materials to serve for a long time under a wider range of experimental conditions, the accuracy of the material creep performance and life prediction model is very important. The calculation of the steady-state creep rate fitting equation of materials plays a vital role in the study of the creep properties of materials and the life reliability of related components. [0003] At pres...

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): G06F17/50
CPCG06F30/20G06F2119/08
Inventor 李昂赵凯吴雷韩秋良高蔚吴福郑晓静陈开媛张毅
Owner RES INST OF PHYSICAL & CHEM ENG OF NUCLEAR IND
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