scholarly journals Energy Absorption and Low Velocity Impact Response of Open-Cell Polyurea Foams

2019 ◽  
Vol 5 (2) ◽  
pp. 132-142 ◽  
Author(s):  
B. J. Ramirez ◽  
V. Gupta
Keyword(s):  
Energy Absorption ◽  
Impact Response ◽  
Low Velocity Impact ◽  
Low Velocity ◽  
Open Cell ◽  
Velocity Impact

Energy absorption and low velocity impact response of polyurethane foam filled pyramidal lattice core sandwich panels

2014 ◽  
Vol 108 ◽  
pp. 304-310 ◽  
Author(s):  
Guoqi Zhang ◽  
Bing Wang ◽  
Li Ma ◽  
Linzhi Wu ◽  
Shidong Pan ◽  
...  
Keyword(s):  
Energy Absorption ◽  
Polyurethane Foam ◽  
Sandwich Panels ◽  
Impact Response ◽  
Low Velocity Impact ◽  
Low Velocity ◽  
Velocity Impact ◽  
Foam Filled ◽  
Lattice Core

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.

Effect of Graphene Platelets/Fiber on Plastics Nanocomposites under Low-Velocity Impact Response

2016 ◽  
Vol 852 ◽  
pp. 23-28
Author(s):  
S. Subha ◽  
Battu Sai Krishna ◽  
Dalbir Singh ◽  
R. Gokulnath
Keyword(s):  
Energy Absorption ◽  
Impact Energy ◽  
Laminate Plate ◽  
Absorption Capacity ◽  
Impact Response ◽  
Low Velocity Impact ◽  
Low Velocity ◽  
Energy Absorption Capacity ◽  
Velocity Impact ◽  
The Impact

In this study, an attempt has made to explore the low-velocity impact response of a Carbon/epoxy laminate (CFRP) and E-Glass/epoxy laminates (GFRP). The composite was reinforced with Graphene Nanoplatelets (GnPs) and impact energy absorption capacity was studied. The plain GFRP and plain CFRP were served as a baseline for comparison. These composite laminate plates were fabricated using hand layup technique. The tests were carried out on the laminate plate as per ASTM D5628 FD. Impact tests were performed using a specially designed vertical drop-weight testing machine with an impactor mass of 1.926 kg. The result shows that laminate plate reinforced with GnPs reinforcement enhances the impact energy absorption capacity of the composites almost 4.5 % in the case Carbon/epoxy laminate and 3.5 % in the case of and E-glass/epoxy laminate. The enhanced impact resistance could be attributed to increased interlaminar fracture toughness of the fibres.

Energy absorption and low-velocity impact response of shear thickening gel reinforced polyurethane foam

2020 ◽  
Vol 29 (4) ◽  
pp. 045018
Author(s):  
Xiaoke Liu ◽  
Chen Qian ◽  
Kejing Yu ◽  
Yang Jiang ◽  
Qianqian Fu ◽  
...  
Keyword(s):  
Energy Absorption ◽  
Polyurethane Foam ◽  
Shear Thickening ◽  
Impact Response ◽  
Low Velocity Impact ◽  
Low Velocity ◽  
Velocity Impact

Response and failure modes of biaxial warp-knitted flexible composite subject to low-velocity impact

2021 ◽  
pp. 152808372110154
Author(s):  
Ziyu Zhao ◽  
Tianming Liu ◽  
Pibo Ma
Keyword(s):  
Impact Energy ◽  
Linear Density ◽  
Failure Modes ◽  
Impact Response ◽  
Low Velocity Impact ◽  
Minor Effect ◽  
Low Velocity ◽  
Velocity Impact ◽  
Flexible Composites ◽  
The Impact

In this paper, biaxial warp-knitted fabrics were produced with different high tenacity polyester linear density and inserted yarns density. The low-velocity impact property of flexible composites made of polyurethane as matrix and biaxial warp-knitted fabric as reinforcement has been investigated. The effect of impactor shape and initial impact energy on the impact response of flexible composite is tested. The results show that the initial impact energy have minor effect on the impact response of the biaxial warp-knitted flexible composites. The impact resistance of flexible composite specimen increases with the increase of high tenacity polyester linear density and inserted yarns density. The damage morphology of flexible composite materials is completely different under different impactor shapes. The findings have theoretical and practical significance for the applications of biaxial warp-knitted flexible composite.

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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