引用本文:
【打印本页】   【HTML】   【下载PDF全文】   【EndNote】   【RefMan】   【BibTex】
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被:浏览 280次   下载 122 本文二维码信息
码上扫一扫!
分享到: 微信 更多
含矩形缺陷结构纤维全缠绕气瓶的爆破压力预测
王子文,赵建平,章昕
南京工业大学机械与动力工程学院,南京 211816
摘要:
采用数值模拟与理论分析相结合的方式对含矩形缺陷纤维全缠绕气瓶的力学行为进行分析。基于Hashin准则进行损伤模式表征以及损伤起始判定,并使用参数退化的损伤演化法则,使用FORTRAN语言编写了适用于ABAQUS/Explicit求解器的VUMAT子程序。选择缠绕顺序为[90°2/18.9°2/90°2/28.9°2/90°2]纤维全缠绕气瓶为研究对象,分析矩形缺陷深度对于纤维缠绕气瓶应力水平影响。基于缺陷深度对筒体各层周向及轴向应力的影响,采用修正方法提出含缺陷纤维全缠绕气瓶爆破压力预测模型,模型预测结果与有限元模拟结果一致。对含不同缺陷深度的爆破压力做出预测,分析结果表明,当缺陷深度大于1.26mm时,爆破压力迅速下降,影响气瓶正常使用。
关键词:  矩形缺陷  理论分析  修正方法  爆破压力
DOI:10.12044/j.issn.1007-2330.2019.02.003
分类号:TH49,V214.8
基金项目:国家重点研发计划项目资助 2017YFC0805601 国家重点研发计划项目资助(2017YFC0805601)
Prediction of Burst Pressure for Filament Wound Cylinders With Rectangular Defects
WANG Ziwen,ZHAO Jianping,ZHANG Xin
School of Mechanical And Power Engineering, Nanjing Tech University, Nanjing 211816
Abstract:
Numerical simulation and theoretical analysis were performed to explore the mechanical behavior of filament wound cylinders with rectangular defects. 3D-Hashin failure criterion was applied to distinguish the damage modes and predict the damage initiation, and damage evolution laws with parameters degradation were used. The VUMAT subroutines which was compiled by FORTRAN was established for ABAQUS/Explicit FE code. Selecting the filament wound cylinder with [90°2/18.9°2/90°2/28.9°2/90°2 ]winding order as the research object, the influence of defect depth on stress level was analyzed. Based on the influence of the defect depth on the circumferential and axial stress of each layer, the calculation formula for the blasting pressure of the filament wound cylinders containing defects was proposed with the adoption of the correction method. The results of this formula are in agreement with the numerical simulation results. This research reveals that when the defect depth is greater than 1.26mm, the burst pressure decreases rapidly, and affects the normal use of the cylinder.
Key words:  Rectangular defects  Theoretical analysis  Correction method  Burst pressure