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Evaluation method and device for full gear contact fatigue life

A technology for contact fatigue and life evaluation, which is applied in the direction of measuring devices, machine gear/transmission mechanism testing, mechanical component testing, etc., and can solve problems such as costing a lot of time and cost

Active Publication Date: 2017-07-25
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When parameters such as gear material, modulus, and number of teeth change, the test must be repeated, which takes a lot of time and cost

Method used

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  • Evaluation method and device for full gear contact fatigue life
  • Evaluation method and device for full gear contact fatigue life
  • Evaluation method and device for full gear contact fatigue life

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Embodiment Construction

[0051]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.

[0052] figure 1 It is a flowchart of a method for evaluating the full life of gear contact fatigue based on crack initiation and propagation in an embodiment of the present invention, as figure 1 shown, including:

[0053] S101: Calculate the maximum contact stress on the gear contact surface according to the maximum contact stress model.

[0054] According to the maximum contact stress model recorded in the national standard GB / T 14229-1003 "Gear Contact Fat...

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Abstract

The invention provides an evaluation method and device for the full gear contact fatigue life based on crack producing and expanding. The method comprises that a maximal contact stress in a gear contact surface is calculated according to a maximal contact stress model; 2D static, 3D static, 2D dynamic and 3D dynamic models are constructed on the basis of a numerical calculation theory and an equivalent boundary condition, and maximal contact stress of corresponding gear contact surfaces are obtained on the basis of the models; the maximal contact stresses obtained on the basis of the four models are compared with the maximal contact stress obtained via the maximal contact stress model, and an optimal numerical calculation model is determined; a gear contact fatigue producing life evaluation model is constructed; the range of effective stress intensity factor values is determined; a gear contact fatigue expanding life evaluation model is constructed; and the full gear contact fatigue life is evaluated according to the gear contact fatigue producing life evaluation model and the gear contact fatigue expanding life evaluation model.

Description

technical field [0001] The invention relates to a gear contact fatigue full-life assessment technology, in particular to a gear contact fatigue full-life assessment method and device based on crack initiation and expansion. Background technique [0002] Gears are the main body of power transmission, and the contact fatigue damage of tooth surfaces is the most common fatigue failure mode. Clarifying the real contact stress distribution of gears and evaluating the contact fatigue life of gears have become important basis for gear anti-fatigue design. [0003] The traditional method of evaluating gear contact fatigue life is to obtain gear contact S-N curves based on a large number of gear contact fatigue tests, and then evaluate the contact fatigue life of gears. However, this traditional method is difficult to reveal the law and mechanism of gear contact fatigue failure, especially the initiation-growth behavior of fatigue cracks. Moreover, the effects of factors such as sur...

Claims

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Application Information

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IPC IPC(8): G01M13/02G06F17/50
CPCG01M13/021G06F30/23G06F2119/06
Inventor 李伟邓海龙赵虹桥刘鹏飞
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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