Finite element analyses of auxetic warp-knitted fabric deformation behaviors under low-velocity impact loading

2020 ◽  
Vol 111 (11) ◽  
pp. 1578-1586
Author(s):  
Wanli Xu ◽  
Zhijia Dong ◽  
Pibo Ma
Keyword(s):  
Finite Element ◽  
Impact Loading ◽  
Low Velocity Impact ◽  
Knitted Fabric ◽  
Finite Element Analyses ◽  
Low Velocity ◽  
Velocity Impact ◽  
Fabric Deformation ◽  
Deformation Behaviors ◽  
Warp Knitted Fabric

scholarly journals The post-impact response of flax/UP composite laminates under low velocity impact loading

2018 ◽  
Vol 28 (2) ◽  
pp. 183-199 ◽  
Author(s):  
HN Dhakal ◽  
H Ghasemnejad ◽  
ZY Zhang ◽  
SO Ismail ◽  
V Arumugam
Keyword(s):  
Finite Element ◽  
Energy Absorption ◽  
Impact Loading ◽  
Composite Laminates ◽  
Low Velocity Impact ◽  
Low Velocity ◽  
Velocity Impact ◽  
Finite Element Software ◽  
Post Impact ◽  
Impact Events

Flax fibre-reinforced unsaturated polyester composite laminates were fabricated by vacuum bagging process and their impact and post-impact responses were investigated through experimental testing and finite element simulations. Samples of 60 mm × 60 mm × 6.2 mm were cut from the composite laminates and were subjected to a low-velocity impact loading to near perforation using hemispherical steel impactor at three different energy levels, 25, 27 and 29 Joules. Post-impact was employed to obtain full penetration. The impacted composite plates were modelled with various lay-ups using finite element software LS-DYNA (LS-DYNA User’s Manual 1997) to provide a validated finite element model for the future investigation in the field. The effects of impact and post-impact on the failure mechanisms were evaluated using scanning electron microscopy. Parameters measured were load bearing capability, energy absorption and damage modes. The results indicate that both peak load and the energy absorption were reduced significantly after the post-impact events. Consequently, it was observed from the visual images of the damages sites that the extent of damage increased with increased incident energy and post-impact events.

scholarly journals Finite Element Analyses of Low Velocity Impact on Thin Composite Disks

2013 ◽  
Vol 3 (6B) ◽  
pp. 59-70 ◽  
Author(s):  
Marcelo L. Ribeiro ◽  
Ricardo Afonso Agélico ◽  
Ricardo de Medeiros ◽  
Volnei Tita
Keyword(s):  
Finite Element ◽  
Low Velocity Impact ◽  
Finite Element Analyses ◽  
Low Velocity ◽  
Velocity Impact
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