摘要
论文采用有限元方法系统地研究了复杂载荷下双金属复合管的屈曲失效,三维有限元数值模型考虑了双金属复合管的准静态复合成型制造过程中产生的残余应力,分析了外基管直径、内衬管壁厚、内外管初始间隙、内衬管屈服强度、内压及内外管间摩擦力等因素对双金属复合管屈曲失效的影响.结果表明,加载路径、复合管的几何尺寸及内衬管的屈服强度对双金属复合管的屈曲性能均有较大影响,内充压力可以延缓内衬管的屈曲.该研究结果将为双金属复合管的设计和应用提供重要的技术支持.
In this paper,the liner buckling and collapse of bi-material metal pipes subjected to combined loading are studied systematically by using the finite element method.A 3-D finite element model is developed by considering the residual stress produced in the quasi-static inflation process.The effects of various parameters,such as the diameter of the outer pipe,the wall thickness of the liner pipe,the initial gap between the outer pipe and the liner pipe,the yield strength of the liner pipe,the internal pressure,and the friction between the outer pipe and the liner pipe on the liner buckling and collapse of bi-material metal pipes are analyzed in detail.It is found that the loading path,the geometric dimension and the yield strength of the liner pipe have significant influences on the buckling of bi-material metal pipes under combined loading.A decrease in the diameter of the outer steel pipe,the annular gap between the liner pipe and the outer steel pipe,or the yield stress of the liner pipe can increase the curvature of liner buckling of the bi-material metal pipes.An increase in the wall thickness of the liner pipe or the internal pressure can delay the liner collapse.The liner buckling and collapse of bi-material metal pipes subjected to combined loading have become an indispensable part in the design of pipeline systems,and the conclusions in this study can thus be used to support the technical design and safety assessment for bi-material metal pipes.
作者
郭奕蓉
张建勋
秦庆华
谭丁森
Yirong Guo;Jianxun Zhang;Qinghua Qin;Dingsen Tan(State Key Laboratory for Strength and Vibration of Mechanical Structures,School of Aerospace,Xi’an Jiaotong University,Xi’an,710049;Shanghai Electric Wind Power Group Co.,Ltd,Shanghai,200235)
出处
《固体力学学报》
CAS
CSCD
北大核心
2019年第4期342-353,共12页
Chinese Journal of Solid Mechanics
基金
国家自然科学基金(11572234,11502189)
中央高校基本科研业务费专项资金资助
关键词
双金属复合管
数值模型
加载路径
屈曲失效
bi-material metal pipe
numerical model
loading path
buckling and collapse
