Pamula Michael Oktavianes, Rahmalina Dwi
Department of Mechanical Engineering, Faculty of Engineering, Universitas Pancasila, Srengseng Sawah, Jakarta Selatan, Daerah Khusus Ibukota, Jakarta, 12630 Indonesia.
PT. Pertamina Hulu Energi Offshore North West Java, RDTX Square, No 164, Jl. Prof. DR. Satrio, RT.4/RW.4, Karet Semanggi, Kecamatan Setiabudi, Kota Jakarta Selatan, Indonesia.
Heliyon. 2024 Jul 24;10(15):e34816. doi: 10.1016/j.heliyon.2024.e34816. eCollection 2024 Aug 15.
The work reports the proposed development of the laminated carbon fiber-reinforced polymer composites (CFRP), at a uniaxial angle as a primary bend clamp material assembly of the offshore gas lift pipelines. Generally, the clamps are utilized to repair the defect of the metallic pipelines due to their practical and mechanical strength. The existing bend clamp model poses challenges especially when applied to the J-tube bending side due to mechanical buckling and corrosion. This study evaluates the effect of laminated CFRP subjected to uniform uniaxial and in-plane compression on API 5 L X52. Several tests, including tensile, bend, and impact tests, are chosen to assess the effect of multiple and thick carbon layers to improve the clamp's mechanical properties. Scanning electronic microscope (SEM) intends to reveal the surface characterization of carbon fiber clamp. The result shows that laminated carbon fiber increases the durability and mechanical properties of the bend clamp for two weeks. The tensile test result shows that the uniaxial orientation has the highest tensile strength of about 2000N and is affected by the strong interfacial bond between the fiber and metal layers. The high impact energy of 2242 ± 0.001 J of the same orientation shows the stability of the clamp under unprecedented dynamic load and enhances the safety. The SEM result at uniaxial shows the resistance towards fracture has increased and was initiated from the air pocket in the composite.
该工作报告了层压碳纤维增强聚合物复合材料（CFRP）作为海上气举管道主弯管夹材料组件在单轴角度下的拟议开发情况。一般来说，由于其实用性和机械强度，这些夹具被用于修复金属管道的缺陷。现有的弯管夹模型存在挑战，特别是应用于J型管弯曲侧时，会出现机械屈曲和腐蚀问题。本研究评估了层压CFRP在均匀单轴和面内压缩下对API 5L X52的影响。选择了包括拉伸、弯曲和冲击试验在内的多项试验，以评估多层和厚碳层对改善夹具机械性能的影响。扫描电子显微镜（SEM）旨在揭示碳纤维夹具的表面特征。结果表明，层压碳纤维在两周内提高了弯管夹的耐久性和机械性能。拉伸试验结果表明，单轴取向具有约2000N的最高拉伸强度，并且受到纤维与金属层之间强界面结合的影响。相同取向的2242±0.001J的高冲击能量表明夹具在前所未有的动态载荷下具有稳定性，并提高了安全性。单轴情况下的SEM结果表明，对断裂的抵抗力有所增加，并且是从复合材料中的气穴处开始的。
