使用新型混合增强复合材料开发新型轻质电线杆--第 1 部分:制造与实验研究

Qianjiang Wu, Farid Taheri
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引用次数: 1

摘要

本文由两部分组成,第一部分讨论了新型轻质、高性价比混合三维复合材料的开发及其在电线杆建造中的应用。主要目的是开发出一种性能与二维纤维增强聚合物(FRP)制成的商用电线杆相当的材料/电线杆,并研究其可行性。新型混合复合材料是使用最近开发并上市的一种用木榫加固的三维 E 玻璃纤维织物-环氧树脂复合材料(以下简称三维木榫加固玻璃钢(3D-drFRPs))制成的。首先,对 3D-drFRP 的抗压和抗弯特性进行了评估。然后,讨论了三维杆的开发,随后使用标准测试方法详细介绍了两种三维 drFRP 的制造,并对它们的响应进行了比较。第二部分是在 LS-DYNA 环境中开发稳健的有限元 (FE) 模型,并根据实验结果进行校准。复杂的非线性 FE 模型用于模拟 ASTM 标准尺寸压缩和三点弯曲试样以及锥形 2D 和棱柱形 3D 杆件的性能。此外,还对等效二维和三维杆的响应进行了数值模拟,因为我们的实验室条件有限,无法在实验中完成这项任务。数值模拟结果的完整性与实验结果进行了验证,证实了所开发模型的准确性。例如,通过模拟获得的 3pt 弯曲试样和 3D 极点的刚度值与实验结果非常接近,误差分别为 3.2% 和 0.89%。最后,我们还开发了一种简化的分析计算方法,以便工程师能够非常准确、快速地确定三维-DrFRP 杆件的刚度。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Development of a Novel Lightweight Utility Pole Using a New Hybrid Reinforced Composite—Part 1: Fabrication and Experimental Investigation
This paper is the first part of a two-part paper that discusses the development of a novel lightweight and cost-effective hybrid 3D composite material and its and utilization for constructing utility poles. The main objective was to generate a material/pole with a comparable performance to the commercially available poles made of 2D fiber-reinforced polymer (FRP) and examine its feasibility. The novel hybrid composite was configured using a recently developed and marketed 3D E-glass fabric–epoxy composite reinforced with wood dowels, referred to as 3D dowel-reinforced FRPs (3D-drFRPs) hereafter. Firstly, the compressive and flexural properties of the 3D-drFRPs are evaluated. Then, the development of the 3D pole is discussed followed by the fabrication details of two 3D-drFRPs using the standard test method, and their responses are compared. For the second part, robust finite element (FE) models were developed in an LS-DYNA environment and calibrated based on the experimental results. A sophisticated nonlinear FE model was used to simulate the performances of ASTM standard-size compression and three-point bending specimens and tapered 2D and prismatic 3D poles. Moreover, the responses of equivalent 2D and 3D poles were simulated numerically, as the task could not be accommodated experimentally due to our laboratory’s deficiencies. The integrity of the numerical simulation results was validated against experimental results, confirming the accuracy of the developed model. As an example, the stiffness values for the 3-pt bending specimens and the 3D poles obtained through the simulations were very close to the experimentally obtained results, with small margins of errors of 3.2% and 0.89%, respectively. Finally, a simplified analytical calculation method was developed so practicing engineers can determine the stiffnesses of 3D-DrFRP poles very accurately and quickly.
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