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Gear Bending Fatigue Life Prediction Method and Device

A bending fatigue and life prediction technology, applied in geometric CAD, design optimization/simulation, calculation, etc., can solve the problems of long cycle, difficult to accurately predict gear bending fatigue life, high cost, and simplify the prediction process, which is convenient and fast. And accurately predict the effect of reducing test costs

Active Publication Date: 2020-04-03
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

However, this traditional method does not consider the influence of factors such as surface processing conditions, geometric characteristics of gear structures, stress gradients, and average stresses.
It is difficult to accurately predict the bending fatigue life of gears, and the mechanism of gear bending fatigue failure cannot be revealed. In addition, this prediction method is mainly based on a large number of tests, and the cost is high and the cycle is long

Method used

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  • Gear Bending Fatigue Life Prediction Method and Device
  • Gear Bending Fatigue Life Prediction Method and Device
  • Gear Bending Fatigue Life Prediction Method and Device

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Embodiment Construction

[0079] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0080] figure 1 It is a flow chart of the method for predicting the bending fatigue life of gears according to the embodiment of the present invention, such as figure 1 As shown, the gear bending fatigue life prediction method includes:

[0081] S101: Establishing a correction model of the fatigue limit based on the surface roughness, and correcting the fatigue limit of the material according to the correction model, to obtain a corrected fatigue limit;

[0...

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Abstract

The invention provides a gear bending fatigue life forecast method and a device. The gear bending fatigue life forecast method comprises the steps that a fatigue limit amendment model is built based on the surface roughness, and the fatigue limit of materials is amended according to the amendment model, the fatigue limit after the amendment is obtained; the threshold crack length is determined according to the threshold stress strength factor range and the amended fatigue limit; a fatigue crack size initiation model is created, and gear fatigue crack initiation life is forecasted based on the fatigue crack size initiation model; gear fatigue crack propagation life is forecasted based on the linear elastic fracture mechanics guidelines; according to the gear fatigue crack initiation life and gear fatigue crack propagation life, a gear bending fatigue calculation model is built, to calculate the gear bending fatigue life.

Description

technical field [0001] The invention relates to the technical field of gear bending fatigue life prediction technology, in particular to a gear bending fatigue life prediction method and device. Background technique [0002] Gears are the key components of the transmission system, and gear fracture caused by tooth bending fatigue is the most common failure mode of gears. It has become an important basis for gear anti-fatigue design to clarify the true stress distribution of gears and predict the working life of gears under bending loads. [0003] The traditional method of predicting the bending fatigue life of gears is to obtain gear S-N curves based on a large number of gear bending fatigue tests, and then carry out strength calculation and design on this basis, and then predict the bending fatigue life of gears. However, this traditional method does not consider the influence of factors such as surface processing conditions, geometric characteristics of gear structures, s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/17G06F30/23G06F119/04
CPCG06F30/17G06F30/23G06F2119/04
Inventor 李伟赵虹桥刘鹏飞邓海龙
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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