基于交流电位法的疲劳裂纹长度测量方法与装置
Measurement Method and Equipment of Fatigue Crack Length Based on Alternating Potential Method
摘 要
阐述了交流电位法测量疲劳裂纹长度的原理和方法,并研制了一套基于交流电位法的疲劳裂纹长度测量装置.该测量装置以LabVIEW为平台,构成了虚拟仪器系统,对数据进行采集、分析和处理,实现了可视化操作、自动测量、曲线显示和数据保存等功能.利用该设备测试了Ti1023钛合金和7055铝合金两种材料试样的疲劳裂纹扩展情况.试验结果表明:该设备的分辨率小于1 μm,利用该装置可以连续测试电压随疲劳周次的变化曲线,并根据标定关系实时转换成裂纹长度随疲劳周次的变化曲线.
疲劳裂纹长度
测量装置
LabVIEW
alternating potential method
fatigue crack length
measurement equipment
LabVIEW
Abstract
The principles of measuring the fatigue crack length based on alternating potential method were interpreted and an equipment of measuring the fatigue crack length based on alternating potential method was developed.This equipment based on LabVIEW is a virtual instrument system which can acquire,analyze and process data and has functions of visualization operation,automatic measurement,curves displaying and data storage.The fatigue crack length of Ti1023 titanium alloy and Al7055 aluminum alloy was measured by this equipment.The results show that the resolution of this equipment is less than 1 μm,and the equipment can measure the relationship between the measuring voltage and fatigue cycles which can be translated into the relationship between fatigue crack length and fatigue cycles based on the calibration.
中图分类号 TG115.5 DOI 10.11973/lhjy-wl201508004
所属栏目 专题报道(疲劳试验和断裂试验)
基金项目
收稿日期 2014/10/14
修改稿日期
网络出版日期
作者单位点击查看
备注李晓阳(1989-),男,硕士.
引用该论文: LI Xiao-yang,HAN Zan-dong,RAN Gang,WANG Bing-fang. Measurement Method and Equipment of Fatigue Crack Length Based on Alternating Potential Method[J]. Physical Testing and Chemical Analysis part A:Physical Testing, 2015, 51(8): 542～545
李晓阳,韩赞东,冉刚,王柄方. 基于交流电位法的疲劳裂纹长度测量方法与装置[J]. 理化检验－物理分册, 2015, 51(8): 542～545
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参考文献
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【3】张丽娟,张亚军,高灵清.表面裂纹长度的测量方法[J].材料开发与应用,2009(10):75-79.
【4】鲁四平,方钦志.基于柔度法的裂纹扩展动态数据采集系统的研究[J].成组技术与生产现代化,2002,19(1):22-24.
【5】王亮,黄新跃,郭广平.直流电位法检测高温合金的疲劳裂纹扩展性能[J].理化检验-物理分册,2011,47(8):480-486.
【6】刘彤,杨荣根,张晓慧,等.疲劳裂纹深度自动检测系统的研制与应用[J].机械强度,2004,26(S1):288-290.
【7】王增勇,余波,孙朝明,等.电位法测试导体表面裂纹深度研究[J].无损检测,2007,29(7):404-406.
【8】LU Shuang-hao,HAN Zan-dong,WANG Wei-bin,et al.Research on over-ground electromagnetic inspection technique for buried pipelines[J].Applied Mechanics and Materials,2013,239/240:293-300.
【9】张永华,张天会,王神洲,等.降K试验下ADB610钢的疲劳裂纹扩展性能[J].理化检验-物理分册,2013,49(5):279-281.
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