Stop drilling procedure for fatigue life improvement

被引：87
|
作者：
Song, PS [1 ]
Shieh, YL
机构：
[1] Dahan Inst Technol, Dept Civil Engn, Hualien 971, Taiwan
[2] Natl Def Univ, Chung Cheng Inst Technol, Dept Syst Engn, Tahsi 335, Taoyuan, Taiwan
来源：
INTERNATIONAL JOURNAL OF FATIGUE | 2004年 / 26卷 / 12期
关键词：
stophole; crack initiation life; total fatigue life; fatigue notch factor;
D O I：
10.1016/j.ijfatigue.2004.04.009
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
This paper investigated how the stop drilling procedure improved the crack initiation life and the total fatigue life in specimens of 6061-T651 aluminium alloy and AISI 304 stainless steel. The crack initiation life was the number of fatigue cycles initiating a 0.2 mm crack at a stophole edge. The larger the stophole diameter, the longer the crack initiation and total fatigue lives. The 2, 2.5, and 3 mm diameter stopholes improved the nonstop-drilled total fatigue life of the 6061-T651 specimen by 187%, 321%, and 443% and that of the AISI 304 specimen by 72%, 121%, and 174%. At each stophole diameter, the 6061-T651 crack initiation life improved over the AISI 304 counterpart because of lower values of the K-f factor and the DeltaJ/palpha(c) ratio. (C) 2004 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1333 / 1339
页数：7
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