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

Solidification deformation prediction methods of composite material of automatic fibre placement

A composite material and automatic wire laying technology, applied in design optimization/simulation, special data processing applications, instruments, etc., can solve problems such as voids and resin-rich areas, influences, gaps, etc.

Inactive Publication Date: 2018-07-10
BEIHANG UNIV
View PDF7 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the actual laying process, there will be various process defects. For example, when the fibers are laid at different laying angles, it is inevitable to produce overlaps of laying materials. In this way, different laying angles will It will affect the local mechanical properties of the composite material, so it is necessary to study the effect of the wire laying angle on the local mechanical properties of the composite material; at the same time, other defects will occur during the wire laying process, such as: gaps between the laying materials, laying Defects such as voids and resin-rich regions generated between layers will also affect the curing deformation of composite materials, so they also need to be studied

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
  • Solidification deformation prediction methods of composite material of automatic fibre placement
  • Solidification deformation prediction methods of composite material of automatic fibre placement
  • Solidification deformation prediction methods of composite material of automatic fibre placement

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0052] Laying defects of the automatic laying composite material in the process, such as the overlap between different layers, voids and resin-rich areas, and the gap between the layers, will affect the mechanical properties of the composite material produced by the automatic laying process (such as The strength and stiffness of the composite structure have an impact. The inventor found in the research that because the overlap area between different plies is often cut or polished by post-machining in actual use, the gap (resin-rich area) has a more prominent impact on the local mechanical properties. . The source of this application is "National Defense Fundamental Research Program Funding", project number: A0520131001.

[0053] This embodiment provides a method for predicting the curing deformation of an automatic wire-laying composite material. Starting from the meso-mechanical model and the macro-laminate theory, a mechanical model of the variable stiffness composite material...

no. 2 example

[0125] This embodiment provides a method for predicting the curing deformation of an automatic silk laying composite material. The steps are basically the same as the method for predicting the curing deformation of the automatic wire laying composite material provided in the first embodiment, with the difference that in this embodiment, the angle difference between adjacent tows needs to be considered.

[0126] Specifically, it includes:

[0127] S1. Establish a sinusoidal trend model of the automatic wire-laying composite material, and use the sinusoidal trend model to simulate the complete automatic wire-laying composite material;

[0128] S2. Apply the sinusoidal trend model to the finite element model, control the angle difference between the fiber bundles of adjacent automatic silk-laying composites, set boundary conditions and loads, and simulate and analyze the curing deformation of the automatic silk-laying composites.

[0129] Due to the requirements of the automatic laying p...

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
tensile strengthaaaaaaaaaa
tensile strengthaaaaaaaaaa
Login to View More

Abstract

The invention relates to the field of composite-material manufacturing of automatic fibre placement, and particularly to solidification deformation prediction methods of a composite material of automatic fibre placement. One of the solidification deformation prediction methods of the composite material of automatic fibre placement comprises: establishing a sine curve trend model of the composite material of automatic fibre placement, and adopting the sine curve trend model to simulate the complete composite material of automatic fibre placement; and applying the sine curve trend model to a finite-element model, controlling angles among the fiber bundles of the composite material of automatic fibre placement, setting a boundary condition and a load, and carrying out simulation analysis on solidification deformation of the composite material of automatic fibre placement. By adopting the methods, deformation prediction of a structure piece can be very well simulated, and guidance can be provided for automatic placement technology of the fiber bundles. In addition, average error of hyperboloid plate solidification deformation prediction of the composite material of automatic fibre placement is less than 20%.

Description

Technical field [0001] The present invention relates to the field of automatic wire laying composite material manufacturing, in particular to a method for predicting the curing deformation of the automatic wire laying composite material. Background technique [0002] The manufacturing process of the automatic laying composite material has its own characteristics, high degree of automation, high laying efficiency, and it is widely used in the automatic laying technology of fiber tows on the composite material structure of the complex surface of the aircraft. [0003] However, various process defects will occur in the actual laying process. For example, when the fibers are laid at different laying angles, overlapping of laying materials will inevitably occur. In this way, the use of different laying angles is It will affect the local mechanical properties of the composite material, so it is necessary to study the influence of the laying angle on the local mechanical properties of the...

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
CPCG06F30/23
Inventor 张博明许玥刘凯祁国成
Owner BEIHANG UNIV