Multi-scale prediction method for progressive failure of composite laminate under low-velocity impact

A composite material layer, low-velocity impact technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problem of multi-scale method to predict the progressive failure of composite material laminates

Active Publication Date: 2018-11-13
ZHEJIANG UNIV
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Problems solved by technology

[0004] The strength calculation and analysis of composite laminates can generally be carried out with the general-purpose finite element software ABAQUS, but the modules of ABAQUS software can only be used to study the progressive fai...

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  • Multi-scale prediction method for progressive failure of composite laminate under low-velocity impact
  • Multi-scale prediction method for progressive failure of composite laminate under low-velocity impact
  • Multi-scale prediction method for progressive failure of composite laminate under low-velocity impact

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Embodiment Construction

[0054] First of all, it needs to be explained that the present invention is an application of computer technology in the field of damage prediction of composite laminated boards. During the implementation of the present invention, the application of multiple software function modules will be involved. The applicant believes that, after carefully reading the application documents and accurately understanding the realization principle and purpose of the present invention, combined with existing known technologies, those skilled in the art can fully implement the present invention by using their software programming skills. Everything mentioned in the application documents of the present invention belongs to this category, and the applicant will not list them one by one.

[0055] In the present invention, the multi-scale prediction method for the progressive failure of composite material laminates under low-velocity impact includes the following process:

[0056] 1. Establish a ...

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Abstract

The invention relates to the field of damage prediction of a composite laminate, aiming at providing a multi-scale prediction method for progressive failure of a composite laminate under low-velocityimpact. The method comprises the following steps: establishing a low-velocity impact finite element model containing a punching hammer, a composite laminate and a support plate; establishing a multi-scale prediction method of composite materials based on micromechanics; solving stress, strain and damage of the composite laminate under s low-velocity impact load based on a multi-scale method; and calculating the low-velocity impact to further obtain the impact force, displacement, velocity and acceleration. A macroscopic progressive failure behavior is predicted from a microscopic point of view; and compared with a research method based on the macromechanics theory of a composite material, the invention considers the influence of the difference of mechanical properties of microscopic fibersand matrixes on the macromechanics properties of the composite laminate, and more essentially and more accurately predicts the progressive failure behavior of the composite laminate under the low-velocity impact load.

Description

technical field [0001] The invention relates to the field of damage prediction of composite material laminates, in particular to a multi-scale prediction method for progressive failure of composite material laminates under low-velocity impact. Background technique [0002] At present, composite laminates are widely used in high-tech fields such as aerospace, wind power generation, and automobiles. However, low-velocity impact damage has a great influence on the strength, stiffness and residual properties of composite laminates. Therefore, it is necessary to clearly understand the progressive failure process of composite laminates under low-velocity impact. [0003] The existing low-velocity impact studies of composite laminates at home and abroad are basically based on macroscopic failure criteria (such as Hashin, Puck and Phiho failure criteria, etc.) to identify complex composite damage modes. Although the above-mentioned macroscopic failure criteria realize the predictio...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/23G06F2119/06
Inventor 廖斌斌郑津洋王栋亮顾超华洪伟荣
Owner ZHEJIANG UNIV
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