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Issue:
Reliability prediction of residual fatigue life for cracked details of ship in service
Author(s):
YAN Xiao-shun
,
HUANG Xiao-ping
,
ZHOU Xin-tao
Pages:
27
-
31
Year:
2016
Issue:
2
Journal:
Ship Science and Technology
Keyword:
residual fatigue life
;
crack growth
;
unique curve model
;
fatigue reliability
;
Abstract:
船舶服役期间工程技术人员需要对已检测到裂纹的构件进行剩余疲劳寿命可靠性评估,以便做出维修决策.鉴于基于S-N曲线和累计损伤理论的常规疲劳寿命预报方法对于损伤难以明确定义,本文基于裂纹扩展理论对船舶疲劳热点剩余疲劳寿命可靠性预报方法进行研究.在考虑应力比和应力强度因子幅门槛值的情况下,研究求解裂纹扩展预报的快速数值计算方法.通过与蒙特卡洛模拟相结合,预报可靠性指标随时间的变化曲线、一定存活率下的剩余疲劳寿命等.以油船上某疲劳热点为研究对象,进行剩余疲劳寿命可靠性预报,为工程应用提供参考.
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