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Method and system for identifying mechanical characteristic parameters of hard coating material

A technology of material mechanics and characteristic parameters, which is applied in the analysis of materials, the use of sound waves/ultrasonic waves/infrasonic waves for material analysis, scientific instruments, etc., can solve the problems of damaged material structure, difficult implementation, etc., and achieve the effect of improving calculation efficiency

Active Publication Date: 2017-02-22
NORTHEASTERN UNIV
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Problems solved by technology

However, the above method needs to damage its material structure and is not easy to implement

Method used

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  • Method and system for identifying mechanical characteristic parameters of hard coating material
  • Method and system for identifying mechanical characteristic parameters of hard coating material
  • Method and system for identifying mechanical characteristic parameters of hard coating material

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Embodiment Construction

[0045] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0046]In this embodiment, the Ti-6Al-4V thin shell structure is used as the matrix, and NiCoCrAlY+YSZ is used as the hard coating material to identify the mechanical property parameters of the hard coating material, that is, the storage modulus and loss of the hard coating composite thin shell structure. factor identification. The material parameters are shown in Table 1:

[0047] Table 1 Geometric and material parameters of thin shell structure and hard coating

[0048]

[0049] In this embodiment, the following system for identifying the mechanical characteristic parameters of the hard coating material is used to identify the mechanical characteristic parameters of the hard coating material. The block diagram is as follows figure 2 shown, including:

[0050] PCB hammer: used to perform hammering test on the thin shell structure be...

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Abstract

The invention provides a method and a system for identifying mechanical characteristic parameters of a hard coating material. The method comprises steps as follows: a finite element model of a hard coating composite thin-shell structure is established; experimental data required for identification of the parameters of the hard coating material are determined; the initial values of energy storage moduli are determined; the accurate values of the energy storage moduli of the hard coating material at different excitation amplitudes are determined; the initial values of loss factors are determined; the accurate values of the loss factors of the hard coating material under different excitation amplitudes are determined; the maximum equivalent strain value under different excitation amplitudes is calculated; a strain dependence representation curve of the mechanical parameters of the hard coating material is drawn. The system comprises a PCB exciting hammer, a vibrating table exciting system, an LMS testing system, a work station and a laser sensor. An inverse method matching inherent frequency and resonant response obtained through experiment measurement with theoretical calculating values is adopted for effectively identifying the energy storage modulus and the loss factors of the hard coating material, methods for determining the energy storage modulus and the loss factors of the hard coating material are given respectively, and the calculation efficiency is substantially improved.

Description

technical field [0001] The invention relates to the technical field of material mechanics, and relates to a method and system for identifying mechanical characteristic parameters of hard coating materials. Background technique [0002] Hard coating refers to coating materials made of metal base, ceramic base or a mixture of the two, and is currently mainly used for thermal barrier, anti-friction and anti-corrosion. In recent years, studies have found that hard coatings can reduce the vibration stress of thin-shell components in high-temperature, high-corrosion environments. Therefore, research on hard coating damping and vibration reduction has attracted more and more attention. In order to better implement hard coating damping and vibration reduction, it is necessary to create a dynamic analysis model of the hard coating composite structure, based on this analysis model to achieve effective prediction and design of the hard coating vibration reduction performance. The key ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/04G01N29/09G01N29/12
CPCG01N29/04G01N29/045G01N29/09G01N29/12G01N2291/018G01N2291/023
Inventor 孙伟杨雪李晖王茁
Owner NORTHEASTERN UNIV
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