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

Calculation method for determining heterogeneous rock crack propagation path based on FFT method

A technology of crack propagation and calculation method, which is applied in the field of computational mechanics numerical simulation method and engineering fracture mechanics, which can solve the problems of low calculation efficiency, inability to describe the relationship between crack development and material failure, and inability to accurately reflect the fracture mechanism of materials, etc.

Inactive Publication Date: 2020-11-10
HOHAI UNIV
View PDF0 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the above problems, the present invention proposes a calculation method based on the FFT method to determine the crack propagation path of heterogeneous rocks to solve the problem that the phase field method in the prior art cannot describe the microscopic scale because it cannot be combined with the FFT homogenization theory. The link between the crack development and the macro-scale material failure, the calculation efficiency is low and the technical problem that cannot accurately reflect the material fracture mechanism

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 determining heterogeneous rock crack propagation path based on FFT method
  • Calculation method for determining heterogeneous rock crack propagation path based on FFT method
  • Calculation method for determining heterogeneous rock crack propagation path based on FFT method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0047] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

[0048] Reference herein to an "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The occurrences of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is understood explicitly and implicitly by those skilled in the art that the embodiments described herein can be combined with other embodiment...

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 determining a heterogeneous rock crack propagation path based on an FFT method, and compared with an original phase field method based on a finite element framework, the phase field fracture calculation method based on the FFT homogenization method can overcome the defects of the finite element framework, reduce the influence of the size effect on calculation, and improve the number calculation efficiency and reduce the calculatoin cost while ensuring the calculation precision. from the microcosmic perspective, the relation between microcosmic-scale crack development and macroscopic-scale material damage is established through the homogenization theory, the material fracture mechanism can be accurately reflected, and a reliable basis is provided for predicting heterogeneous material fracture. In addition, the calculation method for determining the heterogeneous rock crack propagation path based on the FFT method is easy to program and convenient to implement through a programming language, fracture prediction is conducted through a computer, and the manual calculation amount is greatly reduced.

Description

technical field [0001] The invention relates to the technical fields of computational mechanics numerical simulation method and engineering fracture mechanics, in particular to a calculation method for determining the crack propagation path of heterogeneous rock based on the FFT method. Background technique [0002] The fracture mechanism and prediction of heterogeneous rock materials have always been a research hotspot in practical engineering problems. Defects such as initial pores, inclusions, and microcracks in heterogeneous materials will cause the development and evolution of microscopic and macroscopic cracks to become very complicated when the material is subjected to external loads. However, traditional linear elastic fracture mechanics cannot describe the microstructure of materials and cannot predict the crack development process in heterogeneous materials, so it is particularly important to propose a new method that can well simulate the formation and development...

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): G06F30/23G06F111/10G06F119/14
CPCG06F30/23G06F2111/10G06F2119/14
Inventor 曹亚军刘世藩王伟邵建富李海峰朱其志张瑨
Owner HOHAI 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