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Numerical prediction method for stress relaxation and damage effects of rubber material

A rubber material and stress relaxation technology, which is applied in the field of numerical prediction of stress relaxation and damage effects of rubber materials, can solve problems affecting the normal use of the overall system of rubber products, engineering and economic losses, and service state damage, and achieve good prediction and simulation Method, easy to operate, easy to understand effect

Active Publication Date: 2021-01-08
OCEAN UNIV OF CHINA +1
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Problems solved by technology

If the relaxation characteristics of the rubber material predicted by the simulation are inconsistent with the actual situation, it will lead to invalid design or damage to the service state, affecting the normal use of rubber products and even the overall system, resulting in engineering and economic losses

Method used

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  • Numerical prediction method for stress relaxation and damage effects of rubber material
  • Numerical prediction method for stress relaxation and damage effects of rubber material
  • Numerical prediction method for stress relaxation and damage effects of rubber material

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Embodiment Construction

[0048] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention.

[0049] The invention provides a numerical prediction method for stress relaxation and damage effects of rubber materials, such as figure 1 As shown, the specific examples are as follows:

[0050] In order to verify the reliability of the constitutive model and numerical simulation method constructed in the present invention, this embodiment performs numerical prediction of the relaxation characteristics of two different types of rubber materials (nitrile rubber and hydrogenated nitrile rubber). The specific implementation steps are as follows:

[0051] Step 1: Propose time-varying relaxation-damage constitutive model

[0052] In engineering applications, rubber is often in a state of large deformation, and its mechanical characteristics can be simulated by a hyperelastic con...

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Abstract

The invention discloses a numerical prediction method for a stress relaxation and damage effect of a rubber material. The method comprises the following steps: establishing a time-varying relaxation damage constitutive model of the rubber material; carrying out mechanical test on the rubber material; applying the time-varying relaxation damage constitutive model to finite element software, and constructing a compatibility simulation calculation method of a time-varying relaxation damage constitutive relation and a finite element numerical simulation technology; according to the mechanical testdata of the rubber material obtained in the second step, performing fitting identification on key parameters of the time-varying relaxation damage constitutive model of the rubber material by utilizing the compatibility simulation calculation method established in the third step; and according to the established time-varying relaxation damage constitutive model and the identified parameters, carrying out simulation prediction on the time-varying relaxation behavior and the damage deformation numerical value of the rubber material through the compatibility simulation calculation method established in the third step. The method disclosed by the invention can be used for comprehensively analyzing the stress relaxation and damage residual characteristics of the rubber materials with differentloading levels, and is accurate in prediction.

Description

technical field [0001] The invention relates to the technical field of material analysis, in particular to a numerical prediction method for stress relaxation and damage effects of rubber materials. Background technique [0002] Due to its light weight, strong corrosion resistance, nonlinear stiffness and multi-directional stiffness, rubber materials are widely used in engineering fields such as automobiles, ships, electronics, construction and machinery, and have important practical application value. In actual operation, rubber materials exhibit inevitable time-varying stress relaxation characteristics, which affect their working performance and service life. The stress relaxation of rubber materials refers to the phenomenon that the internal stress of the material decays slowly with time when the external loading displacement maintains a constant value. Stress relaxation seriously affects the stability of mechanical properties of rubber materials and their products (such...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06F111/10G06F119/14
CPCG06F30/20G06F2111/10G06F2119/14Y02P90/30
Inventor 冷鼎鑫黄冲马永刘贵杰肖海燕卢丙举
Owner OCEAN UNIV OF CHINA
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