Results 21 to 30 of about 643,568 (346)
e-Polymers, 2022 Composite materials are more and more widely used in aircraft structural design, and impact damage is the most serious defect/damage form of aviation composite structures in service.
Yang Kang +5 more
doaj +1 more source
Fully Convolutional Neural Network With GRU for 3D Braided Composite Material Flaw Detection
IEEE Access, 2019 Automated ultrasonic signal classification systems are often utilized for the recognition of a large number of ultrasonic signals in engineering materials.
Yongmin Guo +6 more
doaj +1 more source
Thermographic non-destructive evaluation for natural fiber-reinforced composite laminates [PDF]
, 2018 Natural fibers, including mineral and plant fibers, are increasingly used for polymer composite materials due to their low environmental impact. In this paper, thermographic non-destructive inspection techniques were used to evaluate and characterize ...
Avdelidis, Nicolas P. +7 more
core +3 more sources
2019 International Congress on Ultrasonics, 2019 In this work, different approaches for damage evaluation in composite laminates using ultrasonic C-scan imaging were used: (1) amplitude and (2) time-of-flight (TOF) immersion pulse-echo and (3) air-coupled through-transmission.
M. Santos, J. Santos, P. Reis, A. Amaro
semanticscholar +1 more source
Characterisation of contact pressure distribution in bolted joints [PDF]
, 2006 The quantification of contact area and pressure distribution in a bolted joint is essential information, as it determines the integrity of the coupling. Current bolted joint design standards are based on analytical solutions of the pressure distribution,
Arakawa +11 more
core +1 more source
Recent advances in the ultrasonic polar scan method for characterizing (degraded) fiber reinforced plastics [PDF]
, 2015 The ultrasonic polar scan (UPS) technique originated in the 1980's as a sophisticated method for inspecting composites. However, it is only in recent times that the true capabilities and strengths of the UPS methodology have been evidenced through ...
Degrieck, Joris +5 more
core +2 more sources
Effects of vacuum thermal cycle on low velocity impact properties of carbon fiber/BMI composites
Cailiao gongcheng, 2020 The T700/HT280 composites were subjected to vacuum thermal cycling (-140-180℃,10-3 Pa). The mass loss rate, dynamic mechanical properties and low-speed impact of composites were tested before and after vacuum thermal cycling respectively.
GAO Yu +5 more
doaj +1 more source
Scientific Reports, 2023 Ultrasonic testing is an important non-destructive testing method, which is sensitive to the defects in the diffusion bonding interface. Ultrasonic testing of diffusion bonding interfaces in complex-surface components is a challenge due to the geometry ...
Gongpeng Yang +7 more
doaj +1 more source
Sensors, 2021 We have built a Fizeau fiber interferometer to investigate the internal cylindrical defects in an aluminum plate based on laser ultrasonic techniques. The ultrasound is excited in the plate by a Q-switched Nd:YAG laser. When the ultrasonic waves interact
Wen-Bei Liu +5 more
doaj +1 more source
A Robust Approach to Optimal Matched Filter Design in Ultrasonic Non-Destructive Evaluation (NDE) [PDF]
, 2016 The matched filter was demonstrated to be a powerful yet efficient technique to enhance defect detection and imaging in ultrasonic non-destructive evaluation (NDE) of coarse grain materials, provided that the filter was properly designed and optimized ...
Hayward, Gordon, Li, Minghui
core +3 more sources