Design optimization of bioinspired helicoidal CFRPP/GFRPP hybrid composites for multiple low-velocity impact loads

The effects of braided architecture and co-braided hybrid structure on low-velocity response of carbon-aramid hybrid three-dimensional five-directional (3D5d) braided composites were experimentally investigated in this study. Low-velocity impact was conducted on two types of hybridization and one pure carbon fiber braided reinforced composites under three velocities. Damage morphologies after low-velocity impact were detected by microscopy and ultrasonic nondestructive testing. Interior damages of composites were highly dependent on yarn type and alignment. Impact damage tolerance was introduced to evaluate the ductility of hybrid composites. Maximum impact load and toughness changed with impact velocity and constituent materials of the composites. The composite with aramid fiber as axial yarn and carbon fiber as braiding yarn showed the best impact resistance due to the synergistic effect of both materials. Wavelet transform was applied in frequency and time domain analyses to reflect the failure mode and mechanism of hybrid 3D5d braided composites. Aramid fibers were used either as axial yarns or braiding yarns, aiding in the effective decrease in the level of initial damage. In particular, when used as axial yarns, aramid fibers effectively mitigate the level of damage during damage evolution.

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ANN prediction model for composite plates against low velocity impact loads using finite element analysis

Composite Structures ◽

10.1016/j.compstruct.2013.02.020 ◽

2013 ◽

Vol 101 ◽

pp. 290-300 ◽

Cited By ~ 14

Author(s):

M.H. Malik ◽

A.F.M. Arif

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Prediction Model ◽

Composite Plates ◽

Low Velocity Impact ◽

Impact Loads ◽

Low Velocity ◽

Element Analysis ◽

Velocity Impact

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Low Velocity Impact and Compression after Impact Properties on Gamma Irradiated Kevlar/Oil Palm Empty Fruit Bunch Hybrid Composites

Coatings ◽

10.3390/coatings10070646 ◽

2020 ◽

Vol 10 (7) ◽

pp. 646

Author(s):

Siti Madiha Muhammad Amir ◽

Mohamed Thariq Hameed Sultan ◽

Ain Umaira Md Shah ◽

Mohammad Jawaid ◽

Syafiqah Nur Azrie Safri ◽

...

Keyword(s):

Gamma Radiation ◽

Oil Palm ◽

Composite Structures ◽

Gamma Ray ◽

Hybrid Composites ◽

Low Velocity Impact ◽

Empty Fruit Bunch ◽

Low Velocity ◽

Velocity Impact ◽

Compression After Impact

This work investigates the dynamic impact response of Kevlar/oil palm empty fruit bunch (EFB) hybrid composite structures with/without gamma radiation under low velocity impact (LVI) and compression after impact (CAI) test. The layering pattern Kevlar/oil palm EFB/Kevlar (K/OP/K) was applied in this work. Irradiation with gamma ray with various doses were applied from 25–150 kGy. LVI results shows that hybrid Kevlar/oil palm EFBs (Kevlar/OPEFB) that were not irradiated have greater impact resistance as compared to irradiated hybrid Kevlar/OPEFB. It was also observed that the hybridization of Kevlar/OPEFB with gamma irradiation helped to improve the compressive residual strength of the composites. It was found that Kevlar/OPEFB hybrid composites with the layering sequence K/OP/K can withstand up to 35 J of impact energy, with the optimum gamma radiation dose at 50 kGy.

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