摘要
正在研制的全海深载人舱及可调压载水舱等其他耐压壳体将采用马氏体镍钢材料制造。其中,18Ni(250)和18Ni(350)是两种备选的马氏体镍钢。在设计过程中,必须依据材料特性对耐压舱的寿命进行合理预报,以确保载人潜水器的使用安全。文中给出了18Ni(250)和18Ni(350)这两种材料的系列裂纹扩展率试验数据,并依据其中某一载荷比条件下的一组试验数据确定了用于寿命预报的统一裂纹扩展率模型参数。根据这些参数,对其他载荷比下的裂纹扩展率曲线进行了预报,并与试验结果进行了对比。对比结果表明了该模型及其参数预报方法对这两种材料的适用性。该项研究可为基于断裂力学的全海深载人舱和可调压载水舱的寿命预报提供基础。
Maraging steel will be applied in the development of full-ocean-depth manned cabin and also some other pressure hull as water ballast cabins.And 18Ni(250)and 18Ni(350)are two candidate types of maraging steels.The life assessments of the manned cabin and water ballast cabins must be conducted to guarantee the safety of the submersible.In this paper,the crack growth test results of 18Ni(250)and 18Ni(350)obtained by experiments are presented,and their parameters of the unified crack growth rate model are obtained based on one group of the experimental results.The crack growth rate curves under other load ratios are predicted according to those parameters.Comparisons between prediction curves and test data show the applicability of the prediction model on the two materials,which can be the theoretical basis in fracture-mechanics based life estimation of manned cabins and water ballast cabins.
作者
张苏杰
王芳
崔维成
ZHANG Su-jie;WANG Fang;CUI Wei-cheng(School of Mechanical Engineering,Jiangsu University of Science and Technology,Zhenjiang 212003,China;Hadal Science and Technology Research Center(Shanghai Engineering Research Center of Hadal Science and Technology),Shanghai Ocean University,Shanghai 201306,China)
出处
《船舶力学》
EI
CSCD
北大核心
2018年第12期1540-1548,共9页
Journal of Ship Mechanics
基金
Supported by the General Program of National Natural Science Foundation of China(Grant No.51679133)
The State Key Program of National Natural Science of China(Project No.51439004)
