Mesoscale strain and damage sensing in nanocomposite bonded energetic materials under low velocity impact with frictional heating via peridynamics

2020 ◽  
Vol 28 (8) ◽  
pp. 085011
Author(s):  
Krishna Kiran Talamadupula ◽  
Stefan J Povolny ◽  
Naveen Prakash ◽  
Gary D Seidel
Keyword(s):  
Energetic Materials ◽  
Frictional Heating ◽  
Low Velocity Impact ◽  
Low Velocity ◽  
Velocity Impact ◽  
Damage Sensing

Coupled Electromechanical Peristatic Simulation of Deformation and Damage Sensing in Granular Materials

2016 ◽  
Author(s):  
Naveen Prakash ◽  
Gary D. Seidel
Keyword(s):  
Energetic Materials ◽  
Imaging Techniques ◽  
Low Velocity Impact ◽  
Polymer Phase ◽  
Explosive Material ◽  
Low Velocity ◽  
Computational Framework ◽  
Damage Sensing ◽  
Explosive Materials ◽  
Microstructure Of The Material

Energetic materials or explosives are a class of granular composite materials consisting of explosive grains dispersed in a polymer matrix. An accidental low velocity impact during transportation may cause damage in the material, which may lead to weakening and possibly ignition of the material. Traditional SHM methods such external sensors or imaging techniques may not reveal changes in the internal microstructure of the material. It is proposed that dispersing carbon nanotubes in the polymer phase of the explosive material will introduce piezoresistivity by which the health of the material can be monitored in real time. In this work, a coupled electromechanical computational framework is developed to investigate nanocomposites and applied to model deformation and damage sensing in nanocomposite bonded explosive materials.

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.

Experimental and numerical assessment of sustainable bamboo core sandwich panels under low-velocity impact

2021 ◽  
Vol 292 ◽  
pp. 123437
Author(s):  
Lívia Ávila de Oliveira ◽  
Maikson Luiz Passaia Tonatto ◽  
Gabriela Luiza Cota Coura ◽  
Rodrigo Teixeira Santos Freire ◽  
Túlio Hallak Panzera ◽  
...  
Keyword(s):  
Sandwich Panels ◽  
Low Velocity Impact ◽  
Low Velocity ◽  
Velocity Impact ◽  
Numerical Assessment
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