摘要
屈服破坏是船体结构失效的主要模式之一,屈服强度的变化会给船体结构设计带来重要影响。研究了船用DH36钢屈服强度与温度的依赖关系。通过低温拉伸试验,确定船用DH36钢在-60~10℃范围内的屈服强度,由自定义函数拟合得到屈服强度与温度的依赖关系,并从微观角度对这一现象进行了解释。结果表明,船用DH36钢在-60~10℃范围内的屈服强度随着温度的降低而升高且服从指数规律,在-60~-20℃范围内船用DH36钢的屈服强度对温度的敏感性高于-20~10℃时的屈服强度。
Yielding failure is a main type of failure for hull structures.Change of yielding strength will bring significant influence on the design of hull structures.Relationship between yielding strength and temperature was studied for marine DH36 steel.Yielding strength of DH36 steel was determined with tensile tests under the temperature from-60℃to 10℃,and functional dependence on temperature was obtained with data fitting.This phenomenon was explained from the microscopic view.The results show that yielding strength of Marine DH36 steel rises as the decrease of temperature at the range of-60℃to 10℃and obeys exponential law,while higher sensitivity to the temperature in the range of-60℃to-20℃than in the range of-20℃to 10℃.
作者
赵伟栋
曹俊伟
冯国庆
任慧龙
ZHAO Weidong;CAO Junwei;FENG Guoqing;REN Huilong(College of Shipbuilding Engineering,Harbin Engineering University,Harbin 150001,China;China Ship Development and Design Center,Wuhan 430064,China)
出处
《中国造船》
EI
CSCD
北大核心
2018年第3期108-115,共8页
Shipbuilding of China
基金
国家自然科学基金(51679050)
关键词
船用DH36钢
屈服强度
温度依赖关系
低温
marine DH36 steel
yielding strength
temperature dependency
low temperature