缺陷/应力交互对碳钢Lcr波声弹性系数的影响

基于L_（cr）波声弹性理论,探讨缺陷及其尺寸对L_（cr）波评价应力的影响机理。结合＂当量法＂预制不同直径盲孔,采用互相关系数函数计算L_（cr）波时间差,通过线性拟合得到L_（cr）波声弹性系数,基于弹塑性变形和圆孔应力集中理论澄清盲孔直径对L_（cr）波声弹性系数的影响机理。结果表明：各直径盲孔L_（cr）波时间差随应力增大基本呈线性增加,但其非线性特征亦逐渐明显,线性阶段的最大应力值小于试样屈服强度;L_（cr）波声弹性系数随盲孔直径增大逐渐减小,并趋于平稳。分析认为,盲孔应力集中是导致上述结果的主要原因,试样各向异性组织及盲孔深度也是其重要因素。...

Full description

Saved in:
Bibliographic Details
Published in材料工程 Vol. 45; no. 7; pp. 97 - 102
Main Author 刘彬 石常亮 缪文炳 董世运
Format Journal Article
LanguageChinese
Published 江苏科技大学 材料科学与工程学院,江苏 镇江,212003%广东省工业分析检测中心,广州,510650%装甲兵工程学院 装备再制造技术国防科技重点实验室,北京,100072 2017
Subjects
Lcr波声弹性理论
交互影响
应力集中
弹塑性变形
无损评价
elastic plastic deformation
无损评价
应力集中
交互影响
nondestructive evaluation
interaction influence
Lcr波声弹性理论
stress concentration
弹塑性变形
Lcr wave acoustoelastic theory
Online AccessGet full text
ISSN1001-4381
1001-4381
DOI10.11868/j.issn.1001-4381.2015.001437

Cover

More Information
Summary:基于L_（cr）波声弹性理论,探讨缺陷及其尺寸对L_（cr）波评价应力的影响机理。结合＂当量法＂预制不同直径盲孔,采用互相关系数函数计算L_（cr）波时间差,通过线性拟合得到L_（cr）波声弹性系数,基于弹塑性变形和圆孔应力集中理论澄清盲孔直径对L_（cr）波声弹性系数的影响机理。结果表明：各直径盲孔L_（cr）波时间差随应力增大基本呈线性增加,但其非线性特征亦逐渐明显,线性阶段的最大应力值小于试样屈服强度;L_（cr）波声弹性系数随盲孔直径增大逐渐减小,并趋于平稳。分析认为,盲孔应力集中是导致上述结果的主要原因,试样各向异性组织及盲孔深度也是其重要因素。
Bibliography:LIU Bin, SHI Chang-liang, MIAO Wen-bing, DONG Shi-yun（1. School of Materials Science and Engineering, Jiangsu University of Science and Technology,Zhenjiang 212003,Jiangsu,China;2. Guangdong Industrial Analysis and Testing Center, Guangzhou 510650 , China; 3. National Key Laboratory for Remanufacturing, Academy of Armored Forces Engineering,Beijing 100072 , China）
11-1800/TB
Based on Lcr wave acoustoelastic theory, the influence mechanism of blind-hole on stress evaluation with Lcr wave was discussed.Combined with equivalent method, the blind-holes with different diameters were preset, the difference in time of flight between Lcr wave was calculated by cross correlation coefficient function, the Lcr wave acoustoelastic coefficient was determined with linear fitting function, the influence mechanism of blind-hole diameter on Lcr wave acoustoelastic coefficient was clarified based on the elastic plastic deformation theory and stress concentration theory of hole.The results show that when the diameter of blind-hol
ISSN:1001-4381
1001-4381
DOI:10.11868/j.issn.1001-4381.2015.001437