Response of Plate and Shell Structures due to Low Velocity Impact

1997 ◽  
Vol 123 (12) ◽  
pp. 1230-1237 ◽  
Author(s):  
Zishun Liu ◽  
Somsak Swaddiwudhipong
Keyword(s):  
Shell Structures ◽  
Low Velocity Impact ◽  
Low Velocity ◽  
Velocity Impact ◽  
Plate And Shell

scholarly journals Low Velocity Impact Response of the Filament Wound Anisogrid CFRP Cylindrical Shells

2021 ◽  
Author(s):  
Suresh Paramasivam ◽  
Anish Jafrin Thilak Johnson
Keyword(s):  
Finite Element ◽  
Carrying Capacity ◽  
Cylindrical Shells ◽  
Finite Element Simulations ◽  
Shell Structures ◽  
Low Velocity Impact ◽  
Load Carrying Capacity ◽  
Low Velocity ◽  
Velocity Impact ◽  
Load Carrying

Abstract This work presents the experimental and finite element simulations to investigate the behavior of both unstiffened and anisogrid composite lattice cylindrical shells under low velocity axial impact. Impact damage has been an epidemic problem for composite structures. Even subjected to a low velocity impact, composite may sacrifice its load carrying capacity considerably due to various modes of failure. The test coupons fabricated as per American Society for Testing of Materials (ASTM) standards were put through Infrared (IR) thermography to find the imperfections during fabrication. The test coupons without defects were only taken into account for material characterization. Finite Element simulations are carried out on both the unstiffened and anisogrid shell structures using LS-DYNA® for a series of low velocity impacts. Also these shell structures were subjected to impact load experimentally for the validation of the results. The results of these studies indicate that the anisogrid model presented in this work possess greater load carrying capacity than unstiffened shell under dynamic loading conditions, also the weight of the structure has been drastically reduced.

Predictions of Localised Damage to Concrete Caused by a Low-Velocity Impact

2021 ◽  
Vol 149 ◽  
pp. 103799
Author(s):  
Zireen Z.A. Majeed ◽  
Nelson T.K. Lam ◽  
Emad F. Gad
Keyword(s):  
Low Velocity Impact ◽  
Low Velocity ◽  
Velocity Impact

Low velocity impact response and damages of GFRP composite tubes under room and cryogenic temperatures

2021 ◽  
pp. 002199832110293
Author(s):  
Memduh Kara ◽  
Mustafa Arat ◽  
Mesut Uyaner
Keyword(s):  
Room Temperature ◽  
Filament Winding ◽  
Low Velocity Impact ◽  
Low Velocity ◽  
Composite Tubes ◽  
Velocity Impact ◽  
Glass Fiber Reinforced Plastic ◽  
Glass Fiber Reinforced ◽  
Gfrp Composite ◽  
Force Time

In this paper, we have investigated the damages of glass fiber reinforced plastic (GFRP) composite tubes under the effect of low-velocity impact (LVI) at cryogenic environment conditions and room temperature. A GFRP composite tube consists of 6 layered E-glass/epoxy samples with a ± 55° winding angle, which produced by the filament winding method. Composite tubes either at room temperature or conditioned by liquid nitrogen at different temperature values (273 K, 223 K, 173 K, and 77 K) were impacted at 5, 7.5, and 10 J. Also, force-time and force-displacement graphs were plotted. The damaged regions of the samples were scrutinized. The damage areas of the GFRP composite tubes were smaller as the temperature decreased. However, the energy absorbed at low-temperature conditions was slightly higher than that absorbed in room temperature. Besides, no micro-cracks developed in the composite tubes after cryogenic conditioning.

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