拉挤玻璃纤维增强塑料（GFRP）复合材料横担的弯曲蠕变行为：关于铺层顺序影响的对比研究

Flexural Creep Behaviour of Pultruded GFRP Composites Cross-Arm: A Comparative Study on the Effects of Stacking Sequence.

作者信息

Alhayek Abdulrahman, Syamsir Agusril, Supian Abu Bakar Mohd, Usman Fathoni, Asyraf Muhammad Rizal Muhammad, Atiqah Mohd Afdzaluddin

机构信息

Civil Engineering Department, College of Engineering, Universiti Tenaga Nasional, Kajang 43000, Malaysia.

Institute of Energy Infrastructure (IEI), College of Engineering, Universiti Tenaga Nasional, Kajang 43000, Malaysia.

出版信息

Polymers (Basel). 2022 Mar 25;14(7):1330. doi: 10.3390/polym14071330.

Pultruded glass fibre reinforced polymer (pGFRP) composites provide outstanding properties for composite polymer cross arms in power transmission line applications. This study has investigated the effects of various stacking sequences of fibres directions of pGFRP on flexural strength and creep behaviour. The use of static four-point bending flexural tests revealed that Stacking Sequence 2 (±45/0/90/0/90/0) had a significant flexural strength of 399.9 MPa while Stacking Sequence 1 (±45/90/0/±45) had a flexural strength of 242.5 MPa. Furthermore, the four-point bending creep experiments were performed at three distinct stress levels, notably 12%, 24%, and 37% of the ultimate flexural strength, to characterise the creep behaviour of distinct stacking sequences. Moreover, Findley's power law equation for bending creep behaviour has revealed that the time-dependent reduction factor of Stacking Sequence 1 and Stacking Sequence 2 estimates a drop in flexural modulus of 23% and 10% respectively.

拉挤玻璃纤维增强聚合物（pGFRP）复合材料在输电线路应用中为复合聚合物横担提供了出色的性能。本研究调查了pGFRP纤维方向的各种堆叠顺序对弯曲强度和蠕变行为的影响。使用静态四点弯曲试验表明，堆叠顺序2（±45/0/90/0/90/0）具有399.9MPa的显著弯曲强度，而堆叠顺序1（±45/90/0/±45）的弯曲强度为242.5MPa。此外，在三个不同的应力水平下进行了四点弯曲蠕变实验，分别为极限弯曲强度的12%、24%和37%，以表征不同堆叠顺序的蠕变行为。此外，Findley弯曲蠕变行为的幂律方程表明，堆叠顺序1和堆叠顺序2的时间相关折减系数分别估计弯曲模量下降23%和10%。