Experimental and numerical investigation on indentation and energy absorption of a honeycomb sandwich panel under low-velocity impact

2016 ◽  
Vol 117-118 ◽  
pp. 21-30 ◽  
Author(s):  
Dahai Zhang ◽  
Dong Jiang ◽  
Qingguo Fei ◽  
Shaoqing Wu
Keyword(s):  
Numerical Investigation ◽  
Energy Absorption ◽  
Sandwich Panel ◽  
Low Velocity Impact ◽  
Low Velocity ◽  
Velocity Impact ◽  
Honeycomb Sandwich

An experimental and numerical investigation on the low velocity impact response of thermoplastic hybrid composites

2017 ◽  
Vol 52 (7) ◽  
pp. 877-889 ◽  
Author(s):  
Aswani Kumar Bandaru ◽  
Shivdayal Patel ◽  
Suhail Ahmad ◽  
Naresh Bhatnagar
Keyword(s):  
Finite Element ◽  
Numerical Investigation ◽  
Energy Absorption ◽  
Hybrid Composite ◽  
Hybrid Composites ◽  
Impact Response ◽  
Low Velocity Impact ◽  
Low Velocity ◽  
Velocity Impact ◽  
Two Hybrid

This paper presented an experimental and numerical investigation on the low velocity impact response of thermoplastic hybrid composites reinforced with Kevlar/basalt fabrics. Two hybrid and one Kevlar homogeneous composite laminates were manufactured with polypropylene as a resin. In the hybrid composites, one hybrid composite (H-1) was manufactured with alternate stacking of four layers of basalt and four layers of Kevlar and the second hybrid composite (H-2) was manufactured with four Kevlar layers on front face and four basalt layers on back face. Low velocity impact tests were performed using a drop-weight impact equipment at three different energies (25 J, 50 J and 75 J). Among the two hybrid composites H-1 hybrid composite exhibited 15.58–20.79% and 13.47–20.47% improvement in the peak force and energy absorption, respectively, than the H-2 hybrid composite. The peak force and energy absorption of Kevlar homogeneous composite was also improved by 10.07–14.37% and 5.38–11.29%, respectively, due to hybridization. A three dimensional (3D) dynamic finite element software, Abaqus/Explicit, was implemented to simulate the experimental results of low velocity impact tests. A user-defined material subroutine (VUMAT) based on Chang-Chang linear-orthotropic damage model was implemented into the finite element code. The predictions from numerical simulation were found to be in good agreement with the experimental results.

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

Quasi-static and low-velocity impact behavior of the bio-inspired hybrid Al/GFRP sandwich tube with hierarchical core: Experimental and numerical investigation

2021 ◽  
Vol 276 ◽  
pp. 114567
Author(s):  
Amirreza Tarafdar ◽  
Gholamhossein Liaghat ◽  
Hamed Ahmadi ◽  
Omid Razmkhah ◽  
Sahand Chitsaz Charandabi ◽  
...  
Keyword(s):  
Numerical Investigation ◽  
Low Velocity Impact ◽  
Impact Behavior ◽  
Low Velocity ◽  
Velocity Impact

Exploration of energy absorption and viscoelastic behavior of CFRPs subjected to low velocity impact

2019 ◽  
Vol 165 ◽  
pp. 247-254 ◽  
Author(s):  
Lin Xiao ◽  
Guanhui Wang ◽  
Si Qiu ◽  
Zhaoxiang Han ◽  
Xiaodan Li ◽  
...  
Keyword(s):  
Energy Absorption ◽  
Viscoelastic Behavior ◽  
Low Velocity Impact ◽  
Low Velocity ◽  
Velocity Impact

Effect of SiO2 Nanoparticles on the Mechanical and Low Velocity Impact Properties of Epoxy/Glass Composites

2016 ◽  
Vol 838 ◽  
pp. 29-35
Author(s):  
Michał Landowski ◽  
Krystyna Imielińska
Keyword(s):  
Flexural Strength ◽  
Energy Absorption ◽  
Impact Energy ◽  
Epoxy Matrix ◽  
Low Velocity Impact ◽  
Low Velocity ◽  
Nanoparticle Suspension ◽  
Impact Properties ◽  
Velocity Impact ◽  
The Impact

Flexural strength and low velocity impact properties were investigated in terms of possibile improvements due to epoxy matrix modification by SiO2 nanoparticles (1%, 2%, 3%, 5%, 7%wt.) in glass/epoxy laminates formed using hand lay-up method. The matrix resin was Hexion L285 (DGEBA) with Nanopox A410 - SiO2 (20 nm) nanoparticle suspension in the base epoxy resin (DGEBA) supplied by Evonic. Modification of epoxy matrix by variable concentrations of nanoSiO2 does not offer significant improvements in the flexural strength σg, Young’s modulus E and interlaminar shear strength for 1% 3% and 5% nanoSiO2 and for 7% a slight drop (up to ca. 15-20%) was found. Low energy (1J) impact resistance of nanocomposites represented by peak load in dynamic impact characteristics was not changed for nanocompoosites compared to the unmodified material. However at higher impact energy (3J) nanoparticles appear to slightly improve the impact energy absorption for 3% and 5%. The absence or minor improvements in the mechanical behaviour of nanocomposites is due to the failure mechanisms associated with hand layup fabrication technique: (i.e. rapid crack propagation across the extensive resin pockets and numerous pores and voids) which dominate the nanoparticle-dependent crack energy absorption mechanisms (microvoids formation and deformation).

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