Influence of Particle Size of Explosive on Ignition Mechanism Under Low Velocity Impact

2020 ◽  
Author(s):  
Hongfu Guo ◽  
Fan Zhang ◽  
Chengzhong Zhao ◽  
Zhao Zhang ◽  
Baohui Yuan
Keyword(s):  
Particle Size ◽  
Low Velocity Impact ◽  
Low Velocity ◽  
Velocity Impact ◽  
Ignition Mechanism

Particle Size-Dependent Responses of Metal–Ceramic Functionally Graded Plates Under Low-Velocity Impact

2018 ◽  
Vol 10 (05) ◽  
pp. 1850056 ◽  
Author(s):  
Bao Zhu ◽  
Yingjian Cai
Keyword(s):  
Particle Size ◽  
Continuum Model ◽  
Functionally Graded ◽  
Low Velocity Impact ◽  
Functionally Graded Plates ◽  
Low Velocity ◽  
Velocity Impact ◽  
Size Dependent ◽  
Metal Ceramic ◽  
The Impact

The analysis of impact response for metal–ceramic functionally graded materials is important for the design of advanced impact resistance structures in aerospace, nuclear and mechanical industries. Here, we propose a dislocation-based continuum model to analyze elasto-plastic deformation of metal–ceramic functionally graded plates under low-velocity impact. The dislocation-based continuum model explicitly accounts for strengthening effects due to geometrically necessary dislocations and plastic strain gradient in impact analysis of metal–ceramic functionally graded plates by combining Taylor dislocation model and Tamura–Tomota–Ozowa (TTO) model. In the dislocation-based model, we describe the effective linear elastic properties of the metal–ceramic functionally graded plates based on the Mori–Tanaka scheme. We show from finite element simulations that particle-size-dependent elasto-plastic properties play important roles in determining the impact behavior of metal–ceramic functionally graded plates and provide a good prediction of diameters of after-impact impression compared to experiments on SiC/Al functionally graded circular plates.

Impact Energy for First Crack of Reinforced Concrete with Partial Replacements of Sand by Rubber 1 mm Particle Size

2013 ◽  
Vol 701 ◽  
pp. 261-264 ◽  
Author(s):  
B.H. Abu Bakar ◽  
Mustafa Maher Al-Tayeb ◽  
Hanafi Ismail ◽  
Hazizan M. Akil
Keyword(s):  
Particle Size ◽  
Reinforced Concrete ◽  
Impact Energy ◽  
Crumb Rubber ◽  
Low Velocity Impact ◽  
Moist Air ◽  
Low Velocity ◽  
Velocity Impact ◽  
The Impact ◽  
Waste Crumb Rubber

Effects of partial replacements of sand by waste crumb rubber 1 mm particle size on the performance of reinforced concrete under low velocity impact loading were investigated. Specimens were prepared for 5%, 10% and 20 % replacements by volume of sand. All specimens were cured in moist air for 90 days. For each case, six beams of 100 mm ×100 mm × 500mm were subjected to 5.15 kg hammer from 900mm height. The number of blows of the hammer required to induce the first crack of the beam were recorded. The results are presented in terms of impact energy required for the first crack. The crumb rubbers increased the impact energy for first crack.

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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