High Pressure‐Amplitude Ratio Ultrasonic Spot Welding of Thermoplastic Carbon Fiber‐Reinforced Epoxy

2021 ◽  
Author(s):  
Zhiwei Qin ◽  
Li Zhou ◽  
Shan Liu ◽  
Xiangchen Meng ◽  
Junchen Li ◽  
...  
Keyword(s):  
High Pressure ◽  
Carbon Fiber ◽  
Spot Welding ◽  
Amplitude Ratio ◽  
Pressure Amplitude ◽  
Fiber Reinforced ◽  
Carbon Fiber Reinforced

Effects of high pressure on the crystallization of carbon fiber reinforced polyetheretherketone (CF/PEEK) laminate composites

1990 ◽  
Vol 48 (4) ◽  
pp. 876-877
Author(s):  
Hong-Ming Lin ◽  
C. H. Liu ◽  
R. F. Lee
Keyword(s):  
High Pressure ◽  
Carbon Fiber ◽  
Sample Surface ◽  
High Yield ◽  
Fiber Reinforced ◽  
Laminate Composites ◽  
Peek Composite ◽  
Continuous Carbon Fiber ◽  
Carbon Fiber Reinforced

Polyetheretherketone (PEEK) is a crystallizable thermoplastic used as composite matrix materials in application which requires high yield stress, high toughness, long term high temperature service, and resistance to solvent and radiation. There have been several reports on the crystallization behavior of neat PEEK and of CF/PEEK composite. Other reports discussed the effects of crystallization on the mechanical properties of PEEK and CF/PEEK composites. However, these reports were all concerned with the crystallization or melting processes at or close to atmospheric pressure. Thus, the effects of high pressure on the crystallization of CF/PEEK will be examined in this study.The continuous carbon fiber reinforced PEEK (CF/PEEK) laminate composite with 68 wt.% of fibers was obtained from Imperial Chemical Industry (ICI). For the high pressure experiments, HIP was used to keep these samples under 1000, 1500 or 2000 atm. Then the samples were slowly cooled from 420 °C to 60 °C in the cooling rate about 1 - 2 degree per minute to induce high pressure crystallization. After the high pressure treatment, the samples were scanned in regular DSC to study the crystallinity and the melting temperature. Following the regular polishing, etching, and gold coating of the sample surface, the scanning electron microscope (SEM) was used to image the microstructure of the crystals. Also the samples about 25mmx5mmx3mm were prepared for the 3-point bending tests.

A novel method for curing carbon fiber reinforced plastics by high-pressure microwave

2016 ◽  
Vol 17 (12) ◽  
pp. 2143-2152 ◽  
Author(s):  
Xiaoping Chen ◽  
Lihua Zhan ◽  
Minghui Huang ◽  
Tengfei Chang ◽  
Shujian Li ◽  
...  
Keyword(s):  
High Pressure ◽  
Carbon Fiber ◽  
Fiber Reinforced ◽  
Carbon Fiber Reinforced Plastics ◽  
Reinforced Plastics ◽  
Novel Method ◽  
Fiber Reinforced Plastics ◽  
Carbon Fiber Reinforced

An Introduction to China National Standard for On-Board High-Pressure Hydrogen Storage Cylinders

2019 ◽  
Author(s):  
Gai Huang ◽  
Jinyang Zheng ◽  
Zhengli Hua ◽  
Binbin Liao
Keyword(s):  
High Pressure ◽  
Carbon Fiber ◽  
Hydrogen Storage ◽  
Material Design ◽  
National Standard ◽  
Hydrogen Fuel Cell ◽  
Fiber Reinforced ◽  
Design Qualification ◽  
Carbon Fiber Reinforced ◽  
Pressure Hydrogen

Abstract High-pressure hydrogen storage is a widely used storage method for hydrogen fuel cell vehicles (HFCVs), and most of the new HFCVs use the fully-wrapped carbon fiber reinforced cylinders as the energy storage component. In order to promote the implementation of HFCVs through the creation of performance-based testing requirements for cylinders in China, the national standard named “Fully-wrapped Carbon Fiber Reinforced Cylinders with an Aluminum Liner for the On-board Storage of Compressed Hydrogen as a Fuel for Land Vehicles” (GB/T 35544) has been published in 2018. The GB/T 35544 contains requirements for the material, design, manufacture, marking, and testing of serially produced, refillable cylinders. In this work, the key points of the standard are introduced, including the category of cylinders, the maximum number of fueling cycles, material properties, design qualification tests, etc. In addition, issues that need to be further studied for developing high-pressure hydrogen storage cylinders are also indicated.

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