Construction and application method of epoxy glue constitutive model for inertial device

A technology of inertial devices and constitutive models, applied in the field of construction of epoxy glue constitutive models for inertial devices

Inactive Publication Date: 2019-05-21
HUNAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the problems encountered in using the existing constitutive model of epoxy glue in the process of analyzing the temperature change characteristics of inertial devices, the present invention proposes a method for constructing the constitutive model of epoxy glue for inertial devices

Method used

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  • Construction and application method of epoxy glue constitutive model for inertial device
  • Construction and application method of epoxy glue constitutive model for inertial device
  • Construction and application method of epoxy glue constitutive model for inertial device

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Embodiment Construction

[0063] Such as figure 1 As shown, the implementation steps of the construction method of a constitutive model of epoxy glue for inertial devices in this embodiment include:

[0064] Step 1, establishing an isotropic linear thermoviscoelastic constitutive equation for describing the mechanical behavior of viscoelastic materials;

[0065] Step 2, solving the aging development equation of epoxy glue for inertial devices;

[0066] Step 3, calculating the aging relaxation modulus of epoxy glue for inertial devices;

[0067] Step 4, calculate the conversion time;

[0068] Step 5, solving the damage development equation of epoxy glue for inertial devices;

[0069] Step 6, establishing a constitutive model of epoxy glue for inertial devices including thermal aging and damage.

[0070] In this embodiment, the three-dimensional constitutive equation of the isotropic linear thermoviscoelastic material established in step 1 is shown in formula (1):

[0071]

[0072] Among them, σ ...

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Abstract

The invention discloses a construction and application method of an epoxy glue constitutive model for an inertial device. The construction and application method comprises the following steps: establishing a linear thermoviscoelasticity constitutive equation, solving an aging development equation and a damage development equation, calculating cross-linking density, conversion time and damage variables, and establishing the epoxy glue constitutive model containing thermal aging and damage. The invention further discloses an application method of the epoxy glue constitutive model for the inertial device. According to the constitutive model construction method, the mechanical behavior of the viscoelastic material under the extreme external environment temperature change and the influence mechanism of the adhesive glue layer on the static output of the inertial device can be reflected more accurately. Accurate numerical simulation and mechanical analysis can be carried out on the constructed viscoelastic constitutive model in finite element software, and the model can be used as a theoretical basis and an application means for temperature change characteristic analysis of an inertial device.

Description

technical field [0001] The invention relates to the research field of constitutive models of viscoelastic materials, in particular to a construction method and application method of epoxy glue constitutive models for inertial devices. technical background [0002] Epoxy glue is mainly used as a bonding agent for the bonding of inertial device components. At the same time, as a viscoelastic material, its material properties have a significant impact on the performance of inertial devices. Inertial devices are an important part of inertial navigation systems and control and testing equipment. Their working conditions are relatively harsh, and they often work in extremely high or low temperature environments. The temperature has a significant impact on the stability of inertial devices, often resulting in inertial device output. At the same time, due to hysteresis and non-repeatable output during the temperature cycle test of the inertial device, it is difficult or even impossi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 姜潮滕霖陈浩林陈亮张习文
Owner HUNAN UNIV
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