Influence of open holes on composites delamination induced by low velocity impact loads

2013 ◽  
Vol 97 ◽  
pp. 239-244 ◽  
Author(s):  
A.M. Amaro ◽  
P.N.B. Reis ◽  
M.F.S.F. de Moura ◽  
M.A. Neto
Keyword(s):  
Low Velocity Impact ◽  
Impact Loads ◽  
Low Velocity ◽  
Velocity Impact

Recommendations for Designing Reinforced Concrete Beams Against Low Velocity Impact Loads

2018 ◽  
Vol 18 (09) ◽  
pp. 1850104 ◽  
Author(s):  
Piyapong Wongmatar ◽  
Chayanon Hansapinyo ◽  
Vanissorn Vimonsatit ◽  
Wensu Chen
Keyword(s):  
Reinforced Concrete ◽  
Impact Load ◽  
Reaction Force ◽  
Reinforced Concrete Beams ◽  
Low Velocity Impact ◽  
Inertia Force ◽  
Impact Loads ◽  
Rc Beams ◽  
Low Velocity ◽  
Velocity Impact

This study investigates the behaviors of simply supported reinforced concrete (RC) beams subjected to impact loads. A numerical model of RC beams has been calibrated and a total of 18 RC beams with varying longitudinal reinforcement, transverse shear reinforcement, span and effective depth are investigated, subjected to different input impact energy. It is found that inertia force plays an important role in resisting an impact load at the starting time. The slenderness of the beam can cause increased downward reaction force and also amplifies the upward reaction force. Based on the numerical results, recommendations are made for designing RC beams under low velocity impact load. A formula is derived to predict the maximum mid-span deflection under low velocity impact load with respect to the kinetic energy and static bending capacity. The maximum spacing and the diameter of stirrups are also recommended so as to avoid the brittle failure under impact load.

Experimental Investigation into the Static Cushioning Properties of Rhombic Honeycomb Paperboard

2011 ◽  
Vol 55-57 ◽  
pp. 1299-1304
Author(s):  
Yong Xie ◽  
Li Rong Yan
Keyword(s):  
Experimental Investigation ◽  
Core Structure ◽  
Low Velocity Impact ◽  
Impact Loads ◽  
Low Velocity ◽  
Stress Strain ◽  
Velocity Impact ◽  
Deformation Behaviors

The cushioning characteristics of honeycomb paperboards with rhombic core were investigated and compared with the conventional hexagonal honeycomb paperboards. The compressing tests under low-velocity impact loads were performed to analyze stresses and deformation behaviors of specimens based on stress-strain curves and cushioning coefficient-strain curves. The results show that, compared of the hexagonal core, the rhombic core structure is able to decrease the rigidity and improve the initial cushioning properties of honeycomb paperboard. It is more benefit for packaging fragile items.

Analysis of tensile preloaded composites subjected to low-velocity impact loads

1998 ◽  
Author(s):  
Ajit Kelkar ◽  
J. Sankar ◽  
K. Rajeev ◽  
Roger Aschenbrenner ◽  
Gregory Schoeppner
Keyword(s):  
Low Velocity Impact ◽  
Impact Loads ◽  
Low Velocity ◽  
Velocity Impact
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