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

Heterostructure simulation method based on ABAQUS

A technology of heterostructures and simulation methods, applied in the direction of design optimization/simulation, etc., can solve the problem of unable to consider special strengthening of heterostructures, unable to consider cross-scale grains, etc.

Active Publication Date: 2020-02-07
EAST CHINA UNIV OF SCI & TECH
View PDF6 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in order to consider the internal physical mechanism existing in the deformation process of heterostructures, the traditional slip resistance model and back stress model that do not consider the grain size can no longer meet the requirements. Among them, the existing slip model cannot consider cross-scale grains , the back stress model cannot take into account the special strengthening of heterostructures

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
  • Heterostructure simulation method based on ABAQUS
  • Heterostructure simulation method based on ABAQUS
  • Heterostructure simulation method based on ABAQUS

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0065] An ABAQUS-based heterogeneous structure simulation method of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific examples.

[0066] figure 1 It is a flowchart of an ABAQUS-based heterostructure simulation method according to an embodiment of the present invention. Among them, the heterostructure is a structure designed across the grain size of the scale, including heterogeneous bimodal structure, lamellar structure and gradient structure, etc., and is specifically obtained by annealing after cold rolling to form local grain recrystallization.

[0067] Such as figure 1 As shown, in this embodiment, the simulation method based on ABAQUS and crystal plasticity constitutive design of heterogeneous structure materials includes steps:

[0068] S1: Establish ABAQUS representative unit models of homogeneous and heterogeneous structures;

[0069] Wherein, step S1 specifically includes:

[0070] S11: Estab...

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 provides a heterostructure simulation method based on ABAQUS. The heterostructure simulation method comprises the following steps: establishing a 2D representative volume unit of a uniform structure and a heterostructure; correcting the sliding resistance model and the back stress model and writing the sliding resistance model and the back stress model into a user subprogram UMAT soas to define an elastic-plastic constitutive equation of the crystal; determining material parameters in the UMAT by utilizing the stretching curves of the three different structures; applying a periodic boundary condition and an external load, and calculating a stress-strain response of each crystal grain by utilizing ABAQUS; averaging stress and strain of all crystal grains; changing parameterssuch as microstructure and grain orientation of the model, predicting and analyzing corresponding macroscopic stress-strain response, strengthening effect and microcosmic deformation cloud atlas, andcomparing to obtain the optimal microstructure. According to the heterostructure simulation method, the grain size effect and extra back stress strengthening of the heterostructure are considered, theheterostructure can be simulated, and the heterostructure simulation method has the advantages of being visual, high in applicability and high in accuracy.

Description

technical field [0001] The invention belongs to the field of finite element numerical calculation of mechanical properties of materials, and relates to an ABAQUS-based heterogeneous structure simulation method. Background technique [0002] With the rapid development of my country's aerospace field, we put forward higher requirements for the comprehensive performance of materials. Although most metallic nano- and ultrafine-grained materials can meet the strength requirements, their low ductility limits their application in many advanced technologies. In recent years, metal heterostructure materials with good comprehensive properties of strength and toughness at ambient temperature and superplasticity at high temperature have been reported. The unique combination of high strength and good ductility makes heterostructure metals a "dream" for structure and function. engineering materials” and applied in transportation, medicine, energy and other fields. [0003] In order to f...

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): G06F30/23
Inventor 张勇贾云飞张显程苑光健王润梓朱旭旻
Owner EAST CHINA UNIV OF SCI & TECH
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