Electromagnetic response changes of unidirectional carbon fiber-reinforced polymer circuit-analog absorbers due to post-processing impact damage

2019 ◽  
Author(s):  
Joseph C. O'Donnell ◽  
Elliot J. Riley ◽  
Ram M. Narayanan
Keyword(s):  
Carbon Fiber ◽  
Impact Damage ◽  
Fiber Reinforced Polymer ◽  
Carbon Fiber Reinforced Polymer ◽  
Electromagnetic Response ◽  
Fiber Reinforced ◽  
Post Processing ◽  
Reinforced Polymer ◽  
Carbon Fiber Reinforced

EXPERIMENTAL ANALYSIS OF LOW VELOCITY IMPACT NEAR THE BVID LIMIT ON CARBON FIBER REINFORCED POLYMER PANELS

2021 ◽  
Author(s):  
ANDREW SEAMONE ◽  
ANTHONY M. WAAS ◽  
PAUL DAVIDSON ◽  
VIPUL RANATUNGA
Keyword(s):  
Carbon Fiber ◽  
Impact Damage ◽  
Fiber Reinforced Polymer ◽  
Low Velocity Impact ◽  
Carbon Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Low Velocity ◽  
Velocity Impact ◽  
Reinforced Polymer ◽  
Carbon Fiber Reinforced

As carbon fiber reinforced polymer matrix panels (CFRP) are increasingly being used in aircraft due to their advantages in strength and weight, it is necessary to understand their durability. In this study, a detailed analysis of critical events during low velocity impact (LVI) will be presented as well as initial compression after impact (CAI) results. Two CFRP layups of 16 and 24 plies are impacted with varying impact energies below and near the barely visible impact damage (BVID) limit. The panels are subsequently compressed in the transverse direction in order to quantify the strength knockdown from pristine panels to damaged ones. The sequence of failure initiation, delamination initiation, and subsequent delamination pattern was identified. The sequence is critical to predictive modeling of failure and failure progression of CFRP composites.

Restoring Initially Cracked Reinforced Concrete Beams utilizing Carbon Fiber Reinforced Polymer Strips

2019 ◽  
Vol 7 (1) ◽  
pp. 30-34
Author(s):  
A. Ajwad ◽  
U. Ilyas ◽  
N. Khadim ◽  
Abdullah ◽  
M.U. Rashid ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Concrete Beams ◽  
Fiber Reinforced Polymer ◽  
Carbon Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Loading Test ◽  
Control Beam ◽  
Reinforced Polymer ◽  
Cfrp Sheet ◽  
Carbon Fiber Reinforced

Carbon fiber reinforced polymer (CFRP) strips are widely used all over the globe as a repair and strengthening material for concrete elements. This paper looks at comparison of numerous methods to rehabilitate concrete beams with the use of CFRP sheet strips. This research work consists of 4 under-reinforced, properly cured RCC beams under two point loading test. One beam was loaded till failure, which was considered the control beam for comparison. Other 3 beams were load till the appearance of initial crack, which normally occurred at third-quarters of failure load and then repaired with different ratios and design of CFRP sheet strips. Afterwards, the repaired beams were loaded again till failure and the results were compared with control beam. Deflections and ultimate load were noted for all concrete beams. It was found out the use of CFRP sheet strips did increase the maximum load bearing capacity of cracked beams, although their behavior was more brittle as compared with control beam.

High thermal conductivity carbon fiber reinforced polymer based on a carbon fiber from pitch and dispersed-filled ENPB matrix

2018 ◽  
pp. 130-137
Author(s):  
E. A. Nikolaeva ◽  
A. N. Timofeev ◽  
K. V. Mikhaylovskiy
Keyword(s):  
Thermal Conductivity ◽  
Carbon Fiber ◽  
High Thermal Conductivity ◽  
Fiber Reinforced Polymer ◽  
Carbon Fiber Reinforced Polymer ◽  
Carbon Powder ◽  
Fiber Reinforced ◽  
Thermophysical Characteristics ◽  
Reinforced Polymer ◽  
Carbon Fiber Reinforced

This article describes the results of the development of a high thermal conductivity carbon fiber reinforced polymer based on carbon fiber from pitch and an ENPB matrix modified with a carbon powder of high thermal conductivity. Data of the technological scheme of production and the results of determining the physicomechanical and thermophysical characteristics of carbon fiber reinforced polymer are presented. 

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