Drilling of CFRP and GFRP composite laminates using one shot solid carbide step drill K44

2018 ◽  
Author(s):  
R. Nagaraja ◽  
T. Rangaswamy
Keyword(s):  
Composite Laminates ◽  
Gfrp Composite ◽  
Solid Carbide ◽  
Step Drill

scholarly journals The Effect of High Glass Fiber Content and Reinforcement Combination on Pulse-Echo Ultrasonic Measurement of Composite Ship Structures

2021 ◽  
Vol 9 (4) ◽  
pp. 379
Author(s):  
Sang-Gyu Lee ◽  
Daekyun Oh ◽  
Jong Hun Woo
Keyword(s):  
Glass Fiber ◽  
Composite Laminates ◽  
Composite Structures ◽  
Ultrasonic Waves ◽  
Ship Structures ◽  
Glass Fiber Reinforced ◽  
Gfrp Composite ◽  
Chopped Strand Mat ◽  
Composite Ship ◽  
Pulse Echo

Ship structures made of glass fiber-reinforced polymer (GFRP) composite laminates are considerably thicker than aircraft and automobile structures and more likely to contain voids. The production characteristics of such composite laminates were investigated in this study by ultrasonic nondestructive evaluation (NDE). The laminate samples were produced from E-glass chopped strand mat (CSM) and woven roving (WR) fabrics with different glass fiber contents of 30–70%. Approximately 300 pulse-echo ultrasonic A-scans were performed on each sample. The laminate samples produced from only CSM tended to contain more voids compared with those produced from a combination of CSM and WR, resulting in the relative density of the former being lower than the design value, particularly for high glass fiber contents of ≥50%. The velocity of the ultrasonic waves through the CSM-only laminates was also lower for higher glass fiber contents, whereas it steadily increased for combined CSM–WR laminates. Burn-off tests of the laminates further revealed that the fabric configuration of the combined CSM–WR laminates was of higher quality, prevented the formation of voids, and improved inter-layer bonding. These findings indicate that combined CSM–WR laminates should be used to achieve more accurate ultrasonic NDE of GFRP composite structures.

scholarly journals Creep effects on tension-tension fatigue behavior of angle-ply GFRP composite laminates

2019 ◽  
Vol 123 ◽  
pp. 144-156 ◽  
Author(s):  
A. Vahid Movahedi-Rad ◽  
Thomas Keller ◽  
Anastasios P. Vassilopoulos
Keyword(s):  
Composite Laminates ◽  
Fatigue Behavior ◽  
Gfrp Composite

Multiple response optimisation of process parameters during drilling of GFRP composite with a solid carbide twist drill

2020 ◽  
Vol 28 ◽  
pp. 2039-2046
Author(s):  
Ritesh Bhat ◽  
Nanjangud Mohan ◽  
Sathyashankara Sharma ◽  
Dayananda Pai ◽  
Sathyabodh Kulkarni
Keyword(s):  
Process Parameters ◽  
Multiple Response ◽  
Twist Drill ◽  
Gfrp Composite ◽  
Solid Carbide

Performances of different mill cutters in machining of GFRP Composite Laminates

2017 ◽  
Vol 4 (2) ◽  
pp. 2800-2805
Author(s):  
I.S.N.V.R. Prashanth ◽  
D.V. Ravi Shankar ◽  
M. Manjoor Hussain ◽  
D. Ramana Reddy
Keyword(s):  
Composite Laminates ◽  
Gfrp Composite

Optimization of pitch distance of kevlar thread stitching in chopped GFRP composite laminates

2020 ◽  
Author(s):  
R. Karthikeyan ◽  
M. K. Karthik ◽  
N. Elumalai ◽  
C. Suresh Kumar
Keyword(s):  
Composite Laminates ◽  
Gfrp Composite ◽  
Pitch Distance
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