Investigation of thermal insulation performance of glass/carbon fiber-reinforced silica aerogel composites

Author(s):  
Wei-Cheng Hung ◽  
Richard S. Horng ◽  
Rung-En Shia
2021 ◽  
pp. 002199832110476
Author(s):  
Haiyan Zhang ◽  
Yan Ren ◽  
Jiaxin Song ◽  
Qi Zhu ◽  
Xuefen Ma

Out-of-plane waviness is one of the most common defects which degenerates the strength, stiffness, and fatigue life of hybrid glass–carbon fiber–reinforced polymer composites (FRPs). An accurate and high-speed non-destructive testing method is highly desired for large composite structures in industries. Ultrasonic phased array is a great candidate for such application. This paper applies the wavenumber algorithm to image the waviness in hybrid FRP plates which are a multi-layered medium. The central frequency of 5 MHZ is chosen in order to maximize the ply resonance. Transducers are migrated virtually to each interface between glass and carbon plies in order to overcome the difficulty of wave propagation analysis in such multi-layered system. The wavenumber algorithm demonstrates a better computational performance compared to that of the traditional total focusing method (TFM) in time domain up to 6 times. The glass ply depth and waviness angle can be more accurately presented with relative errors less than 1.5% and 14.8%, respectively. In addition, the resin-rich defect characterization is also achievable with a maximum error of 14.4%.


2018 ◽  
Vol 5 (9) ◽  
pp. 19854-19861 ◽  
Author(s):  
Santi Swarup Mohanty ◽  
Akshya Kumar Rout ◽  
Dipak Kumar Jesthi ◽  
Bharat Chandra Routara ◽  
Ramesh Kumar Nayak

Sign in / Sign up

Export Citation Format

Share Document