相关实验视频
Updated: Jul 1, 2025

07:21
Twin-Screw Extrusion Process to Produce Renewable Fiberboards
Published on: January 27, 2021
6.4K
同轴分层纤维旋转用于风力轮机叶片回收利用
Varunkumar Thippanna1, Arunachalam Ramanathan2, Dharneedar Ravichandran1
1Manufacturing Engineering, School of Manufacturing Systems and Networks (MSN), Ira A. Fulton Schools of Engineering, Arizona State University (ASU), Mesa, Arizona 85212, United States.
概括
回收风力轮机叶片废弃物提供了一个可持续的解决方案. 新的PAN/GF复合纤维表现出更好的强度和模量,使材料的重新利用能够在电动汽车等应用中提高性能.
科学领域:
- 材料科学 材料科学 材料科学
- 环境科学 环境科学
- 复合材料工程 复合材料工程
背景情况:
- 塑料废物,特别是来自风力轮机叶片 (WTBs) 的塑料废物,由于缓慢的降解和填埋,造成了重大的环境挑战.
- 废旧玻璃的机械回收可以回收玻璃纤维 (GF) 重复使用,创造增值材料.
- 迫切需要可持续的解决方案来管理生命周期结束的复合材料.
研究的目的:
- 从回收的风力轮机叶片材料开发和描述新的复合纤维.
- 研究将回收玻璃纤维纳入聚合物矩阵的潜力.
- 评估由此产生的复合纤维的机械性能提升.
主要方法:
- 使用干喷式湿技术制造同轴层聚烯 (PAN) /玻璃纤维 (GF) 复合纤维.
- 在PAN纤维的中间层中加入0.1重量%的GF含量.
- 进行机械测试以评估复合纤维的强度和模量.
主要成果:
- 成功制造了具有增强机械性能和轻量化性质的PAN/GF同轴层纤维.
- 复合纤维的强度明显增加24.4%,与纯 PAN.相比.
- 在复合纤维中观察到显著的17.7%的模量增加.
结论:
- 开发的PAN/GF复合纤维为材料重新利用提供了一个有希望的可持续替代方案.
- 这些纤维具有卓越的机械性能,使其适用于苛刻的工业应用.
- 潜在的应用包括电动汽车的结构部件,有助于提高性能和能源效率.
相关概念视频
Wind Turbine Machine Models
133
In the growing field of wind energy, incorporating wind turbine models into transient stability analysis is essential. Induction and synchronous machines are the primary models used, with induction machines being prevalent due to their simplicity and reliability.
Induction machines interact through the rotating magnetic field generated by the stator and the rotor. The key parameter is slip, which is the difference between synchronous speed and rotor speed relative to synchronous speed. Slip is...
Induction machines interact through the rotating magnetic field generated by the stator and the rotor. The key parameter is slip, which is the difference between synchronous speed and rotor speed relative to synchronous speed. Slip is...
133
Energy Stored In A Coaxial Cable
1.5K
A coaxial cable consists of a central copper conductor used for transmitting signals, followed by an insulator shield, a metallic braided mesh that prevents signal interference, and a plastic layer that encases the entire assembly.
In the simplest form, a coaxial cable can be represented by two long hollow concentric cylinders in which the current flows in opposite directions. The magnetic field inside and outside the coaxial cable is determined by using Ampère's law. The magnetic...
In the simplest form, a coaxial cable can be represented by two long hollow concentric cylinders in which the current flows in opposite directions. The magnetic field inside and outside the coaxial cable is determined by using Ampère's law. The magnetic...
1.5K
Three-Winding Transformers
224
Three identical single-phase transformers can be configured to form a three-phase transformer connection, which involves high-voltage and low-voltage windings. The high-voltage windings are denoted by capital letters A-B-C, while the low-voltage windings are labeled with lowercase letters a-b-c, representing their respective phases. This notation helps distinguish between the high and low voltage sides of the transformer.
In the per-unit equivalent circuit of a grounded Y-Y three-phase...
In the per-unit equivalent circuit of a grounded Y-Y three-phase...
224
Design Example: Calculating Safe Diameter for Wind-Exposed Disc
93
Assessing safety in wind-exposed installations is crucial to preventing potential failures. This example explores the calculation and design adjustments needed to mount a circular disc on a building facade, where wind forces are a primary concern. A 4-meter diameter disc was initially designed as an aesthetic feature facing winds at a velocity of 25 meters per second, with an air density of 1.25 kilograms per cubic meter. Given these conditions, the drag force on the disc was determined using...
93
Faraday Disk Dynamo
2.2K
A Faraday disk dynamo is a DC generator, producing an emf that is constant in time. It consists of a conducting disk that rotates with a constant angular velocity in the magnetic field, perpendicular to the disk's plane. The rotation of the disk causes a change in magnetic flux, which induces an emf, causing opposite charges to develop on the rim and in the center of the disk. The polarity of the induced emf can be determined by the direction of the magnetic field and the direction of the...
2.2K
Design of Transmission Shafts
297
The design of a transmission shaft is governed by two primary specifications: the power it transmits and its rotational speed. These parameters guide the selection of the shaft's material and cross-sectional dimensions, ensuring that the material's maximum shearing stress remains within the elastic limit while transmitting the desired power at the given speed. The system's power is intrinsically linked to the applied torque. The torque applied to the shaft can be calculated by...
297

