计算力学学报2025，Vol.42Issue(5)：852-858,7.DOI:10.7511/jslx20240610001
双金属复合管凹陷演变机制及界面分离研究
Evolution mechanism of dimpling and interface separation in bimetal clad pipes
摘要
Abstract
To investigate the evolution of dimpling and the mechanism of interface separation in bimetal clad pipes under external mechanical loading,a stress model was established.The study analyzed the effects of the ratio of diameter to thickness for the inner and outer pipes,forming pressure,initial forming clearance,and operational internal pressure on dent formation and interface separation.Results indicate that interface separation distance and rebound rate correlate positively with the ratio of diameter to thickness for the inner pipes,forming pressure,and initial forming clearance,and negatively with the ratio of diameter to thickness for the outer pipes.Higher operational internal pressure reduces interface separation but increases rebound rate.Internal pressurization of dented pipes decreases interface separation;for instance,under 2-MPa operating pressure,interface separation is 5％less compared with conditions under 2-MPa pressurization.Additionally,the difference in separation between these conditions decreases with increasing pressure.Adjacent dimpling results in increased interface separation in intermediate pipe segments,causing a broader interface separation area compared with isolated dimp-ling.关键词
双金属复合管/外部硬物/回弹率/凹陷/界面分离Key words
bimetal clad pipe/external mechanical loading/rebound rates/dimpling/interface separation分类
机械制造引用本文复制引用
张杰,杨云,胡特,林睿南,胡世强..双金属复合管凹陷演变机制及界面分离研究[J].计算力学学报,2025,42(5):852-858,7.基金项目
国家自然科学基金(52104223) （52104223）
四川省重点研发计划(2024YFFK0422)资助项目. （2024YFFK0422）
