scholarly journals Finite element simulation of low velocity impact loading on a sandwich composite

2018 ◽  
Vol 144 ◽  
pp. 01010
Author(s):  
M. Vishwas ◽  
Sharnappa Joladarashi ◽  
Satyabodh M. Kulkarni
Keyword(s):  
Energy Absorption ◽  
Impact Loading ◽  
Sandwich Structure ◽  
Low Velocity Impact ◽  
Von Mises Stress ◽  
Sandwich Composite ◽  
Potential Candidate ◽  
Low Velocity ◽  
Velocity Impact ◽  
Von Mises

Sandwich structure offer more advantage in bringing flexural stiffness and energy absorption capabilities in the application of automobile and aerospace components. This paper presents comparison study and analysis of two types of composite sandwich structures, one having Jute Epoxy skins with rubber core and the other having Glass Epoxy skins with rubber core subjected to low velocity normal impact loading. The behaviour of sandwich structure with various parameters such as energy absorption, peak load developed, deformation and von Mises stress and strain, are analyzed using commercially available analysis software. The results confirm that sandwich composite with jute epoxy skin absorbs approximately 20% more energy than glass epoxy skin. The contact force developed in jute epoxy skin is approximately 2.3 times less when compared to glass epoxy skin. von Mises stress developed is less in case of jute epoxy. The sandwich with jute epoxy skin deforms approximately 1.6 times more than that of same geometry of sandwich with glass epoxy skin. Thus exhibiting its elastic nature and making it potential candidate for low velocity impact application.

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 Energy absorption characteristics of additively manufactured plate-lattices under low- velocity impact loading

2021 ◽  
Vol 149 ◽  
pp. 103768
Author(s):  
J Jefferson Andrew ◽  
Johannes Schneider ◽  
Jabir Ubaid ◽  
R Velmurugan ◽  
N K Gupta ◽  
...  
Keyword(s):  
Energy Absorption ◽  
Impact Loading ◽  
Low Velocity Impact ◽  
Low Velocity ◽  
Velocity Impact ◽  
Absorption Characteristics

Dynamic Response of Two-Core Sandwich Composite Structures under Impact

2008 ◽  
Vol 136 ◽  
pp. 115-124
Author(s):  
Da Zhi Jiang ◽  
Fu Biao Yang ◽  
Su Li Xing ◽  
Jia Yu Xiao
Keyword(s):  
Composite Structures ◽  
Sandwich Structure ◽  
Low Velocity Impact ◽  
Sandwich Composite ◽  
Low Velocity ◽  
Velocity Impact ◽  
Local Displacement ◽  
The Core ◽  
Shear Strains ◽  
The Impact

Traditional sandwich structure consists of two face sheets and a core. With an internal sheet inserted into the core, a two-core sandwich structure is then formed. Two-core sandwich structures with composite laminated face sheets and a thin internal sheet subjected to low velocity impact are studied in this paper. Local displacement of the core under the point of impact is investigated. Simulated results show that the local displacement of the core along the direction of the impact has been decreased significantly by introducing the internal sheet into a traditional single sandwich structure and by reducing the space between the internal sheet and the impacted face sheet. Shear deformation in the cores of a two-core sandwich structure is also investigated and attention is focused on shear strains on interfaces between face/internal sheets and the cores. Results further show that strain levels in selected elements at the interested interfaces depend upon locations of the selected elements and arrangements of the internal sheet.

scholarly journals Effects of impactor shape on the deformation and energy absorption of closed cell aluminium foams under low velocity impact

2020 ◽  
Vol 191 ◽  
pp. 108599 ◽  
Author(s):  
M.A. Islam ◽  
M.A. Kader ◽  
P.J. Hazell ◽  
J.P. Escobedo ◽  
A.D. Brown ◽  
...  
Keyword(s):  
Energy Absorption ◽  
Low Velocity Impact ◽  
Low Velocity ◽  
Velocity Impact ◽  
Closed Cell
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