Shi Jianfeng, Ge Zhoutian, Ni Zhenlei, Zheng Jinyang
Institute of Process Equipment, Zhejiang University, Hangzhou, Zhejiang 310027, China; Engineering Research Center of High Pressure Process Equipment and Safety, Ministry of Education, Hangzhou, Zhejiang 310027, China.
Institute of Process Equipment, Zhejiang University, Hangzhou, Zhejiang 310027, China.
J Press Vessel Technol. 2021 Dec 1;143(6):061502. doi: 10.1115/1.4050835. Epub 2021 May 31.
Glass fiber tape reinforced polyethylene (GFTRP) pipes are widely used for the transportation of oil and high-pressure gas due to their good load-bearing capacity and environmental compatibility. Delamination defect is one of the most common defects of GFTRP pipes during manufacturing and service (Jones et al., "Delamination Growth in Polymer-Matrix Fibre Composites and the Use of Fracture Mechanics Data for Material Characterisation and Life Prediction," Compos. Struct., 2017. 180, 316-333). This paper investigates the load-bearing capacity of GFTRP pipe with interlayer delamination defect in between glass fiber tapes, via a combined experimental and numerical method. In burst experiments, GFTRP pipes with layup of [±55 deg] were prepared with artificial delamination defects set in between sixth and seventh plies. In numerical model, progressive damage model and cohesive element method were used to analyze the failure of GFTRP pipe with interlayer delamination defect. Results showed that interlayer delamination defect would reduce the burst pressure of GFTRP pipes. Different defect widths and their axial locations had different reduction effects on burst pressure, and the predicted results from numerical model showed good consistency with experimental results. Ultimately, the influence of defect width and location on the burst pressure of GFTRP pipe was discussed in detail.
玻璃纤维带增强聚乙烯（GFTRP）管因其良好的承载能力和环境兼容性而被广泛用于石油和高压气体的输送。分层缺陷是GFTRP管在制造和使用过程中最常见的缺陷之一（琼斯等人，“聚合物基纤维复合材料中的分层生长以及使用断裂力学数据进行材料表征和寿命预测”，《复合材料结构》，2017年。第180卷，第316 - 333页）。本文通过实验和数值相结合的方法，研究了玻璃纤维带之间存在层间分层缺陷的GFTRP管的承载能力。在爆破实验中，制备了铺层为[±55°]的GFTRP管，并在第六层和第七层之间设置了人工分层缺陷。在数值模型中，采用渐进损伤模型和粘结单元法分析了具有层间分层缺陷的GFTRP管的失效情况。结果表明，层间分层缺陷会降低GFTRP管的爆破压力。不同的缺陷宽度及其轴向位置对爆破压力有不同的降低作用，数值模型的预测结果与实验结果具有良好的一致性。最后，详细讨论了缺陷宽度和位置对GFTRP管爆破压力的影响。
