| 金属磁记忆信号的零点特征 |
| |
| 引用本文： | 梁志芳,李午申,王迎娜,白世武,薛振奎. 金属磁记忆信号的零点特征[J]. 天津大学学报(自然科学与工程技术版), 2006, 39(7): 847-850 |
| |
| 作者姓名： | 梁志芳 李午申 王迎娜 白世武 薛振奎 |
| |
| 作者单位： | [1]天津大学材料科学与工程学院,天津300072 [2]中国石油天然气管道科学研究院,廊坊065000 |
| |
| 基金项目： | 国家自然科学基金;高等学校博士学科点专项科研项目 |
| |
| 摘 要： | 为研究金属磁记忆信号描述应力集中位置的特征，对预制裂纹的拉伸试件施加不同水平的载荷，在每次载荷水平下进行金属磁记忆方法检测，并分析了检测信号过零点特征的变化规律．研究表明：不是所有的应力集中位置都有金属磁记忆检测信号过零点的现象；信号零点位置随着施加载荷的增加向着应力集中位置移动：仅仅用Hp信号过零点作为特征来判断应力集中位置容易产生误判．
|
| 关 键 词： | 金属磁记忆 信号特征 零值点 |
| 文章编号： | 0493-2137（2006）07-0847-04 |
| 收稿时间： | 2005-07-13 |
| 修稿时间： | 2005-07-132005-12-15 |
Zero Value Character of Metal Magnetic Memory Signal |
| |
| LIANG Zhi-fang,LI Wu-shen,WANG Ying-na,BAI Shi-wu,XUE Zhen-kui. Zero Value Character of Metal Magnetic Memory Signal[J]. Journal of Tianjin University(Science and Technology), 2006, 39(7): 847-850 |
| |
| Authors: | LIANG Zhi-fang LI Wu-shen WANG Ying-na BAI Shi-wu XUE Zhen-kui |
| |
| Affiliation: | 1. School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China; 2. Pipeline Research Institute of CNPC, Langfang 065000, China |
| |
| Abstract: | In order to study the metal magnetic memory(MMM)signal character of describing the position of stress concentration,the sample with precut crack was detected by means of MMM at different tensile stress. The zero value character of detected signal was analyzed.It is concluded that not all of the stress concentration position has the character that the MMM signal value is zero,the dot of MMM signal value zero gradually shifts to the stress concentration position along with enhanced stress,and sometimes,the diagnosis of stress concen- tration position is incorrect only when the character of MMM signal value zero is considered. |
| |
| Keywords: | metal magnetic memory signal character zero value |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
