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High-efficiency simulation evaluation method and system for stone impact resistance of automobile coating

A simulation evaluation and anti-stone impact technology, applied in design optimization/simulation, special data processing applications, sustainable transportation, etc., can solve problems such as poor repeatability of experimental methods, and achieve the effect of avoiding poor experiment repeatability and solving huge simulation scale.

Active Publication Date: 2022-02-08
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This high-efficiency simulation evaluation method for the anti-stone chip performance of automotive coatings not only eliminates the defect of poor repeatability of the experimental method, but also solves the difficulties faced by the simulation method of the whole process of the standard experiment, and provides a basis for the evaluation of the anti-stone chip performance of automotive coatings. A feasible numerical method, the specific technical scheme is as follows

Method used

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  • High-efficiency simulation evaluation method and system for stone impact resistance of automobile coating
  • High-efficiency simulation evaluation method and system for stone impact resistance of automobile coating
  • High-efficiency simulation evaluation method and system for stone impact resistance of automobile coating

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Embodiment 1

[0037] Such as figure 1 As shown, in this embodiment, a high-efficiency simulation evaluation method for the stone impact resistance of automobile coatings is provided. In this embodiment, steel ball particles are used to impact the automobile coating samples. In the multi-particle impact condition, The automobile coating sample is impacted by 10 steel ball particles, such as figure 2shown. Among them, the size of the automotive coating sample is 100mm×200mm×1mm, and the diameter of the steel ball particles is 5mm. The impact velocity and impact angle of each steel ball particle can be calculated by the coupling simulation of the fluid and the particle. The coupling simulation of fluid and particles is the result of previous research, and the simulation process will not be repeated here. The impact velocity and impact angle of each steel ball particle in the multi-particle impact condition are used as known quantities in this embodiment, as shown in Table 1. The impact velo...

Embodiment 2

[0059] Such as Image 6 As shown, the present embodiment provides a schematic structural diagram of a high-efficiency simulation evaluation system for the anti-stone chipping performance of automobile coatings, including a first building block, an output module, a second building block, and an evaluation module;

[0060] Specifically, the first building block, the output module, the second building block and the evaluation module are connected sequentially. The first building block is used to build a single-particle impact damage finite element analysis model, and the single-particle impact damage finite element analysis model is used to analyze the automobile coating. Layer sample single-particle impact simulation experiment; the output module is used to obtain multiple sets of single-particle impact velocity and impact angle, based on the simulation experiment, output multiple sets of single-particle impact damage area; the second building block is used for multiple sets of s...

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Abstract

The invention discloses a high-efficiency simulation evaluation method and system for stone impact resistance of an automobile coating, and the method comprises the steps: obtaining a single-particle impact damage finite element analysis model, and carrying out the simulation experiment of the single-particle impact of an automobile coating sample; obtaining impact speeds and impact angles of multiple groups of single particles, and outputting impact damage areas of multiple groups of single particles based on a simulation experiment; constructing a three-dimensional curved surface model by taking the multiple groups of single-particle impact failure areas as discrete data points, and calculating the impact failure area of each particle in the multi-particle impact working condition; and completing high-efficiency simulation evaluation of the stone impact resistance of the automobile coating based on the impact damage area of each particle. According to the method, the damage area of the automobile coating in a standard experiment is evaluated through a high-efficiency numerical method, the defect that an experiment method is poor in repeatability is overcome, the problem that a simulation method is low in calculation efficiency is solved, and a feasible numerical method is provided for evaluating the stone impact resistance of the automobile coating.

Description

technical field [0001] The invention belongs to the technical field of evaluating the stone chip resistance performance of automobile coatings, and in particular relates to a high-efficiency simulation evaluation method and system for the stone chip resistance performance of automobile coatings. Background technique [0002] When the car is running, it will splash gravel on the road. The splashed gravel hits the coating surface of the car, which will cause the surface of the car body to corrode, affect the appearance of the vehicle, cause the chassis and other parts to intensify the corrosion, and reduce the safety performance of the car. Therefore, it is of great research significance to analyze the stone chip damage phenomenon of coatings, study the stone chip damage mechanism of coatings, and realize the evaluation of coating stone chip resistance. [0003] In terms of experimental research in this field, the two standards currently commonly used in the test of the stone ...

Claims

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Application Information

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IPC IPC(8): G06F30/23
CPCG06F30/23Y02T90/00
Inventor 臧孟炎邹晨祺陈力
Owner SOUTH CHINA UNIV OF TECH