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A method for calculating the overall belt safety factor of a tire

A technology of safety multiples and calculation methods, applied in the direction of calculation, design optimization/simulation, electrical digital data processing, etc., can solve the problems of deviation, neglect, weak analysis and calculation, etc.

Active Publication Date: 2019-08-23
ZHONGCE RUBBER GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, my country's tire industry is accustomed to using the average value of stress and strength based on thin film theory for calculation, but compared with the actual value of hydraulic blasting, there is a large deviation. The main reason is that the analysis and calculation of weaknesses are not in place or neglected.

Method used

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  • A method for calculating the overall belt safety factor of a tire
  • A method for calculating the overall belt safety factor of a tire
  • A method for calculating the overall belt safety factor of a tire

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Experimental program
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Embodiment Construction

[0042] 1. Overview of tire material model and tire structural mechanics finite element analysis

[0043] Here, some theories and techniques involved in the development of tire structure finite element analysis software are briefly summarized firstly.

[0044] 1.1 Unit model

[0045]Two element models are used: eight-node hexahedron iso-insert element and six-node pentahedron isoparametric element.

[0046] 1.2 Material model

[0047] The incompressibility of rubber materials is solved by the Lagrangian multiplier method, and its physical nonlinearity is simulated by the Mooney-Rivlin model. The strain energy density function is described as:

[0048] W(I 1 , I 2 )=C 10 (I 1 -3)+C 01 (I 2 -3)

[0049] Among them, I1 and I2 are the first and second strain invariants, respectively, and C10 and C01 are material constants determined by experiments.

[0050] For rubber-based composite materials, the orthotropic material model is used to simulate, and the corresponding equi...

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Abstract

The invention relates to the field of calculation of safety factor of an integral belt ply structure of a tire, in particular to a method for calculating safety factor number of the integral belt ply of the tire using a material model for finite element analysis and calculation. The method for calculating the safety factor number of the integral belt ply of the tire has the advantages that the safety factors of the belt ply under the tire air inflation state and loading state are respectively calculated by autonomously-developed simulation analysis software and the tire material model, the characteristic of the safety factor of the belt ply of an all-steel radial tire under the air inflation state is studied and analyzed, and the change rule of the safety factor of the belt ply under the load state is also analyzed; a new set of calculation formula for the safety factor of the belt ply is designed by the finite element method.

Description

technical field [0001] The invention relates to the field of calculating the safety factor of the overall belt layer structure of a tire, in particular to a calculation method for calculating the value of the overall belt layer safety factor of the tire through finite element analysis using a material model. Background technique [0002] Tires are an important component of automobiles and an important product of the rubber industry. The main function of the tire is to support the load, transmit braking force, driving force and steering force to the ground, as well as cushioning and vibration reduction. Most of the external forces for the vehicle to achieve various movements are generated by the interaction between the tire and the road surface. Tires have a very important impact on the performance of the car, such as the handling stability of the vehicle, the safety of driving and braking, the power and passability of the vehicle, etc., and also affect the environmental prot...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCG06F30/17G06F30/23
Inventor 尹海山潘思宇倪力静余志成
Owner ZHONGCE RUBBER GRP CO LTD