VARIATION OF OVALIZATION FOR SHARP-NOTCHED CIRCULAR TUBES UNDER CYCLIC BENDING

被引：15

作者：

Lee, K. -L. ^{[2
]}

Hung, C. -Y. ^{[3
]}

Pan, W. -F. ^{[1
]}

机构：

[1] Natl Cheng Kung Univ, Dept Engn Sci, Tainan 70101, Taiwan

[2] Far E Univ, Dept Comp Applicat Engn, Tainan 74448, Taiwan

[3] Mil Acad, Dept Mech Engn, Kaohsiung 83059, Taiwan

来源：

JOURNAL OF MECHANICS | 2010年 / 26卷 / 03期

关键词：

Sharp-notched circular tubes; Cyclic bending; Ovalization; Curvature; Number of cycles; THIN-WALLED TUBES; TO-THICKNESS RATIO; EXTERNAL-PRESSURE; CURVATURE-RATE; SQUARE TUBES; STABILITY; DEGRADATION; COLLAPSE;

D O I：

10.1017/S1727719100003968

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

In this paper, an experimental investigation on the variation of ovalization for sharp-notched circular tubes subjected to cyclic bending is discussed. The tube bending machine and curvature-ovalization measurement apparatus were used to test the unnotched and sharp-notched 304 stainless steel tubes. For sharp-notched tubes, five different notch depths (0.2, 0.4, 0.6, 0.8 and 1.0mm) were considered in this study. It was found that the experimental curve of the ovalization and the number of cycles could be divided into three stages-an initial, secondary and tertiary stage. An empirical relationship was proposed for simulating the aforementioned curve for the initial and secondary stages in this study. It has been shown that the derived empirical relationship was in good agreement with the experimental data.

引用

页码：403 / 411

页数：9

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