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Spur gear tooth root crack propagation rule analysis method based on finite element simulation

A technology of crack growth and analysis method, which is applied in the field of spur gear tooth root crack growth law analysis, which can solve the problems of high experimental cost, long time consumption, and harsh experimental environment.

Pending Publication Date: 2021-01-05
NORTHEASTERN UNIV
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Problems solved by technology

The relevant physical experiment methods currently used have strict requirements on the experimental environment, high experimental costs, and long time-consuming, which is not an ideal and feasible method.

Method used

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  • Spur gear tooth root crack propagation rule analysis method based on finite element simulation
  • Spur gear tooth root crack propagation rule analysis method based on finite element simulation
  • Spur gear tooth root crack propagation rule analysis method based on finite element simulation

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Embodiment Construction

[0034] The invention will be further described below in conjunction with the accompanying drawings and specific implementation examples.

[0035] Such as figure 1 As shown, a method for analyzing the root crack growth law of spur gears based on finite element simulation includes the following steps:

[0036] Step 1: According to the gear parameters of the spur gear, the specific parameter values ​​are shown in 1, and the finite element simulation model of the spur gear is established by using the finite element analysis software (such as ANSYS software), as shown in Figure 4 shown;

[0037] Table 1 Spur gear geometric parameter table

[0038]

[0039] Step 2: In order to improve the simulation accuracy, in the finite element simulation model, the triangular element mesh is divided into the root crack propagation area;

[0040] Step 3: Set simulation conditions for the finite element simulation model and verify the validity of the simulation conditions, including:

[00...

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Abstract

The invention provides a spur gear tooth root crack propagation rule analysis method based on finite element simulation. The method comprises the following steps of firstly, establishing a gear simulation model by utilizing ANSYS, then completing load loading, mesh generation, boundary condition setting, stress solving and other work on the basis of the model, importing the model into FRANC3D to obtain data such as an expansion path and direction of a gear tooth root crack, stress intensity factor change in a crack expansion process, crack life prediction and the like, and finally, analyzing afinite element simulation result to obtain a spur gear tooth root crack propagation rule. According to the method, the propagation rule of the spur gear tooth root cracks is researched based on a numerical simulation method, the crack propagation situation is tracked, the distribution rule of crack tip stress intensity factors and a fatigue life prediction curve are obtained, the calculation precision is high, the experiment speed is higher, the efficiency is higher, and convenience is brought to the depth research of gear tooth root crack propagation.

Description

technical field [0001] The invention relates to the technical field of dedendum fatigue crack growth, in particular to a method for analyzing the growth law of spur gear dedendum cracks based on finite element simulation. Background technique [0002] Gear transmission is the most important and widely used transmission in mechanical transmission. There are inevitably cracks or defects similar to cracks in gears of any material and structure. Their existence and expansion reduce the load-bearing capacity of gears. This in turn affects the safety and overall quality of the engineering organization. A large number of experiments have shown that dedendum cracks are the most influential factor leading to gear tooth fracture. [0003] At present, the research on gears at home and abroad mainly focuses on the analysis of the strength of gears, while there are few studies on the law of crack growth in gears. Therefore, a more in-depth study on root crack growth is needed. The rel...

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Application Information

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IPC IPC(8): G06F30/17G06F30/23G06F119/02G06F119/04
CPCG06F30/17G06F30/23G06F2119/02G06F2119/04
Inventor 张眸青李旭司山水马辉李响孙超张殿华韩月娇
Owner NORTHEASTERN UNIV
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