复合材料压力容器的简化模型有限元分析

IF 0.7 Q3 ENGINEERING, MULTIDISCIPLINARY
J. Jadoon, A. Shazad, Muhammad Muzamil, M. Akhtar, Mohsin Sattar
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引用次数: 1

摘要

压力容器是高压容器必不可少的工业工具之一。压力容器的灾难性故障对社会是有害的。为了确保压力容器的安全性,选择高强度材料并对其进行超出工作负荷的分析是设计压力容器的关键。由于其高强度重量比、耐腐蚀性等特点,无衬垫复合气瓶在压力容器行业中变得越来越重要。然而,需要对其力学性能进行准确有效的预测。采用有限元方法对简化模型进行结构分析。利用APDL对石墨/环氧复合材料体系的三维壳体结构进行了分析。对内部压力为20 MPa的5倍减小模型施加适当的边界条件。通过网格无关性选择合适的网格尺寸,并讨论了简化模型的应力分布,特别是内部两层的应力分布。通过与前人研究的比较,验证了模型的有效性。0.1°旋转的血管条给出了准确和保守的结果。采用Tsai Wu, Tsai Hill,最大剪切应力(Smax)和Von Mises来评估复合材料圆柱体的破坏。每个失效准则都预测了所有简化模型的第二层失效。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Finite Element Analysis of Composite Pressure Vessel Using Reduced Models
Pressure vessels are one of the essential industrial tools for high-pressure containments. Catastrophic failure of pressure vessels is detrimental to society. It is essential to design pressure vessels by selecting high-strength materials and analyzing them beyond working loads to ensure safety. Liner less composite cylinders have gained importance in the pressure vessel industry owing to their high strength-to-weight ratios, corrosion resistance, etc. However accurate and efficient prediction of their mechanical properties was required. Finite element methods were employed for the structural analysis of reduced models. The three-dimensional shell structure of the Graphite/Epoxy composite system was analyzed using APDL. Appropriate boundary conditions were applied to 5x reduced models internally pressurized to 20 MPa. Suitable mesh size was selected through mesh independence and stress distributions were discussed for reduced models, especially for the inner two layers. Comparison with previous research confirmed the validity of the models. 0.1° rotated strip of the vessel gives accurate and conservative results. Tsai Wu, Tsai Hill, Maximum Shear Stress (Smax), and Von Mises were used to assess the failure of composite cylinders. Each of the failure criteria predicts the failure of the second layer for all the reduced models.
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来源期刊
TECCIENCIA
TECCIENCIA ENGINEERING, MULTIDISCIPLINARY-
自引率
66.70%
发文量
20
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