Evaluation of Stress and Stress Concentration Degree Based on the Online Piezomagnetic Measurement

IF 1 4区材料科学 Q3 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Research in Nondestructive Evaluation Pub Date : 2021-08-07 DOI:10.1080/09349847.2021.1963022

S. Bao, Qiang Luo, Zhengye Zhao, Yibin Gu

引用次数: 1

Abstract

ABSTRACT The goal of this research is to correlate the piezomagnetic field with the stress and the stress concentration degree of ferromagnetic steels. Specimens of X80 steels were machined into smooth plates with circular holes in the center and tensile tests were carried out to detect the online piezomagnetic field on the surface of defective specimens. The relationship between the distribution of the stress and the distribution of the piezomagnetic field components was systematically investigated. Compared with the normal component and its gradient, the tangential component showed a better correlation with the distribution of the stress. A piezomagnetic parameter was defined to characterize the abnormal changes of the tangential component around the defect. Quantitative algorithms were established to evaluate the stress concentration degree on the basis of piezomagnetic parameters. This research will be a supplement of stress evaluation methods based on magnetic measurement technologies.

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基于在线压磁测量的应力及应力集中度评价

摘要:本研究的目的是将压磁场与铁磁性钢的应力和应力集中程度联系起来。将X80钢试样加工成中间有圆孔的光滑板材，进行拉伸试验，检测缺陷试样表面的在线压磁场。系统地研究了应力分布与压磁场分量分布的关系。与法向分量及其梯度相比，切向分量与应力分布的相关性更好。定义了一个压磁参数来表征缺陷周围切向分量的异常变化。建立了基于压磁参数的应力集中程度定量评价算法。本研究将是对基于磁测技术的应力评价方法的补充。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Research in Nondestructive Evaluation 工程技术-材料科学：表征与测试

CiteScore

2.30

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： Research in Nondestructive Evaluation® is the archival research journal of the American Society for Nondestructive Testing, Inc. RNDE® contains the results of original research in all areas of nondestructive evaluation (NDE). The journal covers experimental and theoretical investigations dealing with the scientific and engineering bases of NDE, its measurement and methodology, and a wide range of applications to materials and structures that relate to the entire life cycle, from manufacture to use and retirement. Illustrative topics include advances in the underlying science of acoustic, thermal, electrical, magnetic, optical and ionizing radiation techniques and their applications to NDE problems. These problems include the nondestructive characterization of a wide variety of material properties and their degradation in service, nonintrusive sensors for monitoring manufacturing and materials processes, new techniques and combinations of techniques for detecting and characterizing hidden discontinuities and distributed damage in materials, standardization concepts and quantitative approaches for advanced NDE techniques, and long-term continuous monitoring of structures and assemblies. Of particular interest is research which elucidates how to evaluate the effects of imperfect material condition, as quantified by nondestructive measurement, on the functional performance.