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On the impact damage resistance and tolerance improvement of hybrid CFRP/Kevlar sandwich composites
Faculty
Engineering
Year:
2022
Type of Publication:
ZU Hosted
Pages:
Authors:
Ahmed Wagih Abdallah Abdelhady Deebes
Staff Zu Site
Abstract In Staff Site
Journal:
Microporous and Mesoporous Materials El Sevier
Volume:
Keywords :
, , impact damage resistance , tolerance improvement , hybrid CFRP/Kevlar
Abstract:
This work presents an experimental demonstration of the significant improvement in the damage resistance of carbon fiber reinforced polymer (CFRP) Kevlar sandwich composite laminates under impact and compression after impact loads. A core of Kevlar plies was sandwiched between two face sheets of CFRP, representing twothird the global laminate thickness. Hand lay-up and vacuum bagging were used to manufacture the sandwich composite structure. Tests of low velocity impact and compression after impact (CAI) were performed to characterize the damage resistance. The different damage modes and their sequence during low velocity impact were visualized using microcomputed tomography. The results showed different damage levels in CFRP/Kevlar core laminates at low and high impact energies. At low impact energy, 10 J, few matrix cracks and delaminations were the main damage modes inside CFRP/Kevlar core laminate, however, extensive delamination, matrix cracks and fiber cut at the lower part of the laminate were appeared inside the fully CFRP laminate. At high impact energy, 70 J, fiber cut was observed inside the whole CFPR laminate, however, for CFRP/Kevlar core laminate, the lower CFRP face sheets did not suffer from any kind of damage. This allowed CFRP/Kevlar core laminate to sustain large load after the load drop occurred when the maximum load capacity of the laminate is reached. Moreover, it allowed CFRP/Kevlar core laminate to sustain larger compressive load during CAI tests resulting in improved residual CAI strength. Owing to the low density of Kevlar fibers and lower damage level during impact (better damage resistance), CFRP/Kevlar core laminate showed up to 51% larger specific CAI strength than CFRP laminate (better damage tolerance).
Author Related Publications
Ahmed Wagih Abdallah Abdelhady Deebes, "Effect of milling time on morphology and microstructure of Al-Mg/Al2O3 nanocomposite powder produced by mechanical alloying", International Journal of Advances in Engineering Sciences, 2014
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Ahmed Wagih Abdallah Abdelhady Deebes, "Effect of Mechanical Milling on the Morphologyand Structural Evaluation ofAl- Al2O3 Nanocomposite Powders", International Journal of Engineering, 2014
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Ahmed Wagih Abdallah Abdelhady Deebes, "Experimental investigation and FE simulation of spherical indentation on nano-alumina reinforced copper-matrix composite produced by three different techniques", elsevier, 2017
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Ahmed Wagih Abdallah Abdelhady Deebes, "Improved mechanical and wear properties of hybrid Al-Al2O3/GNPs electroless coated Ni nanocomposite", Elsevier, 2018
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Department Related Publications
Soliman Soliman Soliman Alieldien, "A first-order shear deformation finite element model for elastostatic analysis of laminated composite plates and the equivalent functionally graded plates", Ain Shams Engineering Journal, 2011
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Soliman Soliman Soliman Alieldien, "Size-dependent analysis of functionally graded ultra-thin films", Structural Engineering and Mechanics, Vol. 44, No. 4 (2012) 431-448, 2012
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Soliman Soliman Soliman Alieldien, "Bending Analysis of Ultra-thin Functionally Graded Mindlin Plates Incorporating Surface Energy Effects", International Journal of Mechanical Sciences, 2013
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Soliman Soliman Soliman Alieldien, "Finite element analysis of functionally graded nano-scale films", Finite Elements in Analysis and Design, 2013
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Soliman Soliman Soliman Alieldien, "Finite Element Analysis of the Deformation of Functionally Graded Plates under Thermomechanical Loads", Mathematical Problems in Engineering, 2013
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