Unlock instant, AI-driven research and patent intelligence for your innovation.

Hierarchical Sensitivity Analysis Method for Parameters of Fiber Reinforced Composite Materials

A technology of sensitivity analysis and composite materials, applied in the field of parameter level sensitivity analysis of fiber reinforced composite materials, which can solve problems such as inability to solve research difficulties

Inactive Publication Date: 2021-06-04
SHANGHAI JIAOTONG UNIV
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the defect that the prior art cannot solve the above two research difficulties, the present invention proposes a layered sensitivity analysis method for fiber-reinforced composite material parameters

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
  • Hierarchical Sensitivity Analysis Method for Parameters of Fiber Reinforced Composite Materials
  • Hierarchical Sensitivity Analysis Method for Parameters of Fiber Reinforced Composite Materials
  • Hierarchical Sensitivity Analysis Method for Parameters of Fiber Reinforced Composite Materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0043] Such as figure 1 As shown, it is a kind of fiber reinforced composite material parameter level sensitivity analysis method involved in this embodiment, which includes the following steps:

[0044] Step 1. For 3D woven carbon fiber composite materials, firstly define the model and hierarchical structure of each scale: each scale model is as follows: figure 2 As shown, there are two levels of models including the L1 level and the L2 level. There are three sub-models at the L1 level, which are the sub-models of the fiber and the matrix with respect to the warp, weft and binding yarns; the L2 level is about the warp, weft and binding yarns. The sub-model of the unit cell; the hierarchical structure corresponding to the three-dimensional woven carbon fiber multi-scale composite material model is as follows image 3 As shown, then define the input and output of each scale model, and determine the input, output and the probability density function of the input. image 3 The...

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

A layered sensitivity analysis method for fiber-reinforced composite material parameters. By determining the sub-models of each level of the multi-scale model of fiber-reinforced composite materials, the meso-meso-scale index is obtained through the sensitivity analysis of the material parameters of the meso-meso scale model. Then, through the sensitivity analysis of the material parameters of the meso-macro scale model, the meso-macro scale index and the independent transformation variable are obtained; then based on the sensitivity analysis, the sensitivity index of the mesoscopic material parameter and the independent transformation variable is obtained; finally, the linear regression is obtained by linear regression The sensitivity index of the multi-scale model of the entire fiber reinforced composite material is obtained by regressing the coefficient and integrating and combining the above indicators, and based on the sensitivity index, the degree of influence on the material parameters is effectively evaluated. The invention has important significance and practical value for improving the design efficiency of new materials, shortening the design period, and quickly and effectively carrying out material design schemes.

Description

technical field [0001] The invention relates to a technology in the field of new material manufacturing, in particular to a method for analyzing the hierarchical sensitivity of fiber-reinforced composite material parameters. Background technique [0002] Fiber-reinforced composites have the advantages of low density, high specific stiffness, high specific strength, and fatigue resistance, but there are uncertainties at all scales caused by factors such as material discreteness, manufacturing process, simulation model, and operating environment. Determinism affects the macroscopic mechanical properties of fiber reinforced composites through scale transfer and interaction. The hierarchical sensitivity analysis method is of great significance and practical value to improve the design efficiency of new materials, shorten the design cycle, and quickly and effectively carry out material design schemes. [0003] There are two research difficulties in the process of realizing the h...

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 Patents(China)
IPC IPC(8): G01N3/00G01N3/06G16C60/00
CPCG01N3/00G01N3/06G01N2203/0075G01N2203/0096G01N2203/0214G16C60/00
Inventor 朱平许灿刘钊李钼石
Owner SHANGHAI JIAOTONG UNIV