双频振动载荷下带V形槽铝合金棒料的断裂行为

中国机械工程

双频振动载荷下带V形槽铝合金棒料的断裂行为

化春键1, 2;陆云健1, 2;袁浩1, 2

1.江南大学机械工程学院，无锡，214122
2.江南大学江苏省食品先进制造装备技术重点实验室，无锡，214122

出版日期:2017-07-25 发布日期:2017-07-26
基金资助:
国家高科技研究发展计划（863计划）资助项目（61104213）;
中央高校基本科研业务费专项基金资助项目（JUSRP11008）
National High Technology Research and Development Program of China (863 Program)（No. 61104213）
Fundamental Research Funds for the Central Universities（No. JUSRP11008）

Fracture Behavior of Aluminum Alloy Bars with V-shape Notchs under Dual Frequency Vibration Loads

HUA Chunjian1,2;LU Yunjian1,2;YUAN Hao1,2

1.School of Mechanical Engineering,Jiangnan University,Wuxi,Jiangsu,214122
2.Jiangsu Key Laboratory of Food Manufacturing Equipment Technology,Jiangnan University,Wuxi,Jiangsu,214122

Online:2017-07-25 Published:2017-07-26
Supported by:
National High Technology Research and Development Program of China (863 Program)（No. 61104213）
Fundamental Research Funds for the Central Universities（No. JUSRP11008）

摘要/Abstract

摘要： 针对金属棒料低应力分离过程中裂纹萌生扩展速率低的问题，提出一种基于双频振动的加载方法，探究带V形槽7A09铝合金棒料的断裂行为。研究了双频振动对带V形槽金属棒料裂纹萌生扩展的作用机理，通过研发双频激振装置，对带V形槽7A09铝合金棒料进行了实验研究。实验结果表明，相对于单频振动加载方法，双频振动载荷能够大幅缩短带V形槽7A09铝合金棒料的分离时间，有效提高裂纹萌生扩展的速率与稳定性，棒料断面几何精度高。

关键词: 双频振动, 金属棒料, 铝合金, 裂纹

Abstract: Aiming at problems of low crack initiations and propagation rates in low stress separation processes of metal bars, a new method was proposed based on double frequency vibrations. This method was used to explore the fracture behaviors of 7A09 aluminum alloy bars with V-shape notchs. The mechanism of double-frequency vibrations on the crack initiations and expansions of V-shaped metal bars was given. Experiments of the V-shaped groove 7A09 aluminum alloy bars were carried out by developed dual-frequency exciting device. Experimental results show that compared with the single frequency vibration loading method, double frequency vibration load may shorten separation time of 7A09 aluminum alloy bars with V-shape notchs significantly, improve the crack initiation rates and stability of the expansion effectively, also the bar section geometric accuracy is high.

Key words: double frequency vibration, metal bar, aluminum alloy, crack

中图分类号:

TG111.9

化春键1, 2;陆云健1, 2;袁浩1, 2. 双频振动载荷下带V形槽铝合金棒料的断裂行为[J]. 中国机械工程.

HUA Chunjian1,2;LU Yunjian1,2;YUAN Hao1,2. Fracture Behavior of Aluminum Alloy Bars with V-shape Notchs under Dual Frequency Vibration Loads[J]. China Mechanical Engineering.

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