Dynamic observation of localized strain pulsation generated in the plastic deformation process by electronic speckle pattern interferometry

被引：27

作者：

Toyooka, S ^{[1
]}

Widiastuti, R ^{[1
]}

Zhang, QC ^{[1
]}

Kato, H ^{[1
]}

机构：

[1] Saitama Univ, Grad Sch Sci & Engn, Urawa, Saitama, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 2001年 / 40卷 / 2A期

关键词：

dynamic ESPI; band propagation; plastic deformation waves; localized strain pulsation; physical mesomechanics;

D O I：

10.1143/JJAP.40.873

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

An electronic speckle pattern interferometry (ESPI) system, which makes it possible to observe dynamic phenomena, was applied to investigate the plastic deformation process in tensile experiments of aluminum alloy samples. The dynamic behavior of a strain-localized band which propagated through a specimen was thoroughly investigated. A pulsating fringe variation of the order of 1 Hz was discovered to be the fine structure of the propagating band. Fringe pulsation is caused by localized strain pulsation which suggests that the stress relaxation process propagates periodically with a time constant which governs the dissipative characteristics of a heterogeneous material.

引用

页码：873 / 876

页数：4

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