摘要
钢丝缠绕增强塑料复合管(PSP)外压失稳试验研究提出了 PSP 外液压试验装置和试验方法,并进行了 PSP瞬时临界失稳压力和长时蠕变失稳压力的测量。为了进一步理解 PSP 的失稳现象和失稳的力学机理,提出了一个PSP 失稳压力预测力学模型,将 PSP 简化为四层正交各向异性层合管,用回字形模型推导出复合层弹性常数,根据唐奈扁壳理论建立 PSP 瞬时失稳临界压力力学模型。理论结果与试验值吻合较好,表明给出的计算模型可以较好预测复合管的失稳临界压力。进一步分析 PSP 设计参数与临界压力的关系,提出提高 PSP 失稳临界压力的措施。最后对 PSP 持久临界失稳压力进行了估算。
The short-term buckling critical pressure and long-term buckling creep pressure were measured according to previously proposed methods. In order to understand the mechanisms of the buckling of PSP, a model was formulated to predict the buckling critical pressure. PSP was simplified as orthotropic laminated cylinder shell, and elastic parameters of single layers were estimated based on rectangle model. Short-term buckling critical pressure was deduced from Donnell shell theory. Theoretical prediction on short-term buckling critical pressure agreed well with experimental data. Relationship between structure parameters and critical pressure were analyzed and measures to improve the critical pressure were proposed.
出处
《中国塑料》
CAS
CSCD
北大核心
2008年第3期57-61,共5页
China Plastics
基金
国家教育部新世纪优秀人才支持计划(NCET-04-0526)
国家教育部博士点专项科研基金(20050335065)
温州工业科技研究开发项目(G2004034)
关键词
钢骨架复合管
外压失稳
屈曲分析
steel mesh skeleton composite pipe
stability under external pressure
buckling analysis
