FATIGUE LIFE OF WELDED PLATE-T JOINTS UNDER VARIABLE-AMPLITUDE LOADING

被引：4

作者：

BOUCHARD, R

VOSIKOVSKY, O

RIVARD, A

机构：

[1] The authors are with the Metals Technology Laboratories, CANMET, Ottawa, Ont. KIA 061

来源：

INTERNATIONAL JOURNAL OF FATIGUE | 1991年 / 13卷 / 01期

关键词：

WELDED JOINTS; FATIGUE CRACK GROWTH; VARIABLE-AMPLITUDE LOADING;

D O I：

10.1016/0142-1123(91)90123-G

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Two new PC-based systems for fatigue testing machine control and data acquisition were installed at the Metals Technology Laboratories (MTL) to facilitate tests with variable-amplitude loading using long sequences. The testing machine frames were modified for tests of welded T joints at negative load ratios (R). Results of variable-amplitude (VA) tests of eight T joints (26 and 78 mm thick) with a common-load sequence (COLOS) are presented in terms of effective, and root mean square stress ranges, and Miner's sums, and compared with data from constant-amplitude (CA) tests. Fatigue crack growth, and shape development results monitored by the AC potential drop technique, and beach marking are reported and analysed.

引用

页码：7 / 15

页数：9