纤维缠绕复合材料压力容器封头厚度的逐层预测方法
A method for predicting dome thickness layer by layer of filament wound composite pressure vessel
张行 1任明法 2王磊 1祖磊 3何景轩3
作者信息
- 1. 大连理工大学 工程力学系,大连 116024
- 2. 大连理工大学 机械工程学院,大连 116024;高性能精密制造全国重点实验室,大连 116024;辽宁省先进复合材料高性能制造重点实验室,大连 116024
- 3. 西安航天动力技术研究所,西安 710025;燃烧、热结构与内流场国防科技重点实验室,西安 710072
- 折叠
摘要
受纤维缠绕成型工艺和封头段变曲率/厚度等的影响,复合材料压力容器封头段受力状态较为复杂,实现对封头段缠绕层厚度的逐层精准预测,对于构建高精度有限元模型、指导工程应用具有重要意义.针对上述问题,本文基于双公式法及三次样条函数法,发展了一种复合材料压力容器封头缠绕层厚度逐层预测方法,研究了极孔半径、单层纱带厚度和缠绕层数对封头厚度和赤道圆处缠绕角的影响.结果表明:随着极孔半径增大及单层纱带厚度减小,封头段纤维缠绕层厚度极值逐渐减小,赤道圆处缠绕角度的变化随极孔半径与单层纱带厚度减小逐层减小;进一步地,通过对比封头段每层缠绕层厚度,发现各缠绕层厚度由内层到外层随着平行圆半径增大呈现先变大后减小最终趋于相同的趋势.
Abstract
Due to the influence of fiber winding molding process and the variable curvature/thickness of the dome,the stress state of the dome of the composite pressure vessel was relatively complicated.It was of great significance to accurately predict the thickness of the winding layer of the dome,which was of great significance for con-structing a high-precision finite element model and guiding engineering applications.In order to solve the above problems,this study developed a layer-by-layer prediction method for the winding layer thickness of composite pressure vessel dome based on the dual formula method and cubic spline function method.The effects of polar hole radius,the thickness of single-layer yarn thickness and number of winding layers on the thickness and winding angle of the dome were studied.The results show that as the polar hole radius increases,the thickness of the single-layer yarn sheet in the dome decreases gradually,the extreme value of the fiber winding layer of the dome gradually decreases,and the variation of winding angle at the equatorial circle decreases with the decrease of the radius of the polar hole and the thickness of single-layer yarn.Furthermore,by comparing the thickness of each layer of the dome,it is found that the thickness of each winding layer from the inner layer to the outer increases first,then decreases,and finally tends to be the same as the radius of parallel circle increases.
关键词
复合材料压力容器/封头厚度/逐层预测/三次样条函数/缠绕角Key words
composite pressure vessel/dome thickness/prediction of layer by layer/cubic spline function/winding angle引用本文复制引用
出版年
2024
NETL
NSTL
万方数据