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Issue:
Effectiveness Varying in Dimension of Crack-Stopping Holes
Author(s):
HE Yunshu
,
CHEN Lijun
,
DU Hongzeng
Pages:
29
-
31
Year:
2004
Issue:
3
Journal:
JOURNAL OF CIVIL AVIATION UNIVERSITY OF CHINA
Keyword:
应力集中
;
有限元素法
;
局部应力应变法
;
疲劳寿命
;
Abstract:
当航空器结构在航线使用过程中出现疲劳裂纹损伤时,通常在裂纹尖端打止裂孔进行临时性修理.通过理论分析和计算及试验分析,研究了止裂孔尺寸对止裂效果的影响.结果表明,当航空器结构出现疲劳裂纹损伤时,采用5.57~7.14 mm直径的止裂孔进行止裂修理,止裂效果较好;当止裂孔直径为6.35 mm时,止裂效果最好.
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