单个角型颗粒冲蚀机理实验系统设计及实验

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摘要研究单个角型颗粒的冲击过程，有助于深入理解冲蚀磨损过程中材料去除的机理。本文设计了一种用于冲击机理研究的单颗粒冲击实验装置，装置可按照设计速度、角度以及颗粒方位角发射单个颗粒撞击靶体材料，并通过高速摄像机捕捉颗粒撞击的动态过程。利用该装置进行了菱形形状的硬质角型颗粒撞击AA3003铝合金靶体材料的实验，结果表明：装置能够有效研究冲击参数（冲击速度、冲击角、方位角等）对冲击行为和材料变形机制的影响，实现研究变量可控，有助于研究冲蚀磨损过程的主、次要影响因素。冲击角和方位角是决定颗粒旋转方向的关键因素，不同的旋转方向对应了不同的材料变形机制。通过颗粒运动轨迹图像，揭示了冲击诱导的颗粒旋转与冲蚀机理之间的相关性。本文设计的实验装置及方法为颗粒冲蚀中的细观力学行为研究提供了一种有效的研究手段。

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	李增亮
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	范春永
	刘斌

关键词 ：冲蚀磨损, 弹射装置, 角型颗粒, 高速成像, 颗粒旋转

Abstract：Studying impact process of a single angular particle is helpful to understand the material removal mechanism in erosion wear process.Here, a new type catapult for studying a single particle impact mechanism was designed, and this device could launch a single angular particle to hit a target material according to designed speed, angle and particle azimuth, and capture the dynamic process of particle impact using a high-speed camera.This device was used to conduct a test for a diamond-shaped hard angular particle hitting AA3003 aluminum alloy target material.The results showed that this device can be used to effectively study the influences of impact parameters including impact speed, impact angle, and particle azimuth on the impact behavior and material deformation mechanism, and realize studied variable controllability; the device is helpful to study the primary and secondary affecting factors in erosion wear process; impact angle and particle azimuth are key factors to determine the particle rotation direction, different rotating directions are corresponding to different material deformation mechanisms; the correlation between particle rotation and erosion mechanism is revealed by the particle motion trajectory image.The designed test device and method provided an effective means for studying meso-mechanical behavior of particle erosion.

Key words： erosion wear catapult angular particles high-speed imaging particle rotation

收稿日期: 2017-04-12 出版日期: 2018-10-28

引用本文:

李增亮，杜明超，董祥伟，范春永，刘斌. 单个角型颗粒冲蚀机理实验系统设计及实验[J]. 振动与冲击, 2018, 37(21): 195-203.
LI Zengliang, DU Mingchao, DONG Xiangwei, FAN Chunyong, LIU Bin. Design and tests for single angular particle erosion mechanism test system. JOURNAL OF VIBRATION AND SHOCK, 2018, 37(21): 195-203.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2018/V37/I21/195

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