In this study, multi-layered composite overwrapped pressure vessels for high-pressure gaseous storage were designed, modeled by finite element method and manufactured by filament winding technique. 34CrMo4 steel was selected as a load-sharing metallic liner. Glass and carbon filaments were overwrapped on the liner with a winding angle of [±11°/90°2]3 to obtain fully overwrapped composite reinforced vessel with non-identical front and back dome endings. The vessels were loaded with increasing internal pressure up to the burst pressure level. The mechanical performances of pressure vessels, (i) fully overwrapped with glass fibers and (ii) with additional two carbon hoop layers on the cylindrical section, were investigated by both experimental and numerical approaches. In numerical approaches, finite element analysis was performed featuring a simple progressive damage model available in ANSYS software package for the composite section. The metal liner was modeled as elastic–plastic material. The results reveal that the finite element model provides a good correlation between experimental and numerical strain results for the vessels, together with the indication of the positive effect on radial deformation of the COPVs due to the composite interlayer hybridization. The constructed model was also able to predict experimental burst pressures within a range of 8%. However, the experimental and finite element analysis results showed that hybridization of hoop layers did not have any significant impact on the burst pressure performance of the vessels. This finding was attributed to the change of load-sharing capacity of composite layers due to the stiffness difference of carbon and glass fibers.

中文翻译：

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层间杂化对金属均压内衬复合外包裹压力容器爆破压力性能的影响研究

在这项研究中，设计了用于高压气体储存的多层复合外包裹压力容器，并通过有限元方法建模并通过纤维缠绕技术制造。选择 34CrMo4 钢作为负载分担金属衬里。玻璃丝和碳丝以 [±11°/90°2]3 的缠绕角包裹在衬里上，以获得具有不同前后圆顶末端的完全包裹的复合增强容器。容器装载有增加到爆破压力水平的内部压力。通过实验和数值方法研究了压力容器的机械性能，（i）完全用玻璃纤维包裹和（ii）在圆柱形截面上有额外的两个碳箍层。在数值方法中，有限元分析的特点是在 ANSYS 软件包中提供了一个简单的渐进式损伤模型，用于复合截面。金属衬垫被建模为弹塑性材料。结果表明，有限元模型提供了容器的实验和数值应变结果之间的良好相关性，同时表明复合层间杂化对 COPV 径向变形的积极影响。构建的模型还能够预测 8% 范围内的实验爆破压力。然而，实验和有限元分析结果表明，箍层的混合对容器的爆破压力性能没有任何显着影响。