Mechanical properties and energy absorption capabilities of aluminium foam sandwich structure subjected to low-velocity impact

2021 ◽  
Vol 273 ◽  
pp. 121996
Author(s):  
Ying Zhao ◽  
Zhaohan Yang ◽  
Tianlai Yu ◽  
Dabo Xin
Keyword(s):  
Mechanical Properties ◽  
Energy Absorption ◽  
Sandwich Structure ◽  
Aluminium Foam ◽  
Low Velocity Impact ◽  
Low Velocity ◽  
Velocity Impact

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 Infrared Thermography to an Aluminium Foam Sandwich Structure Subjected to Low Velocity Impact Tests

2016 ◽  
Vol 167 ◽  
pp. 23-29 ◽  
Author(s):  
C. Meola ◽  
S. Boccardi ◽  
G. Petrone ◽  
N.D. Boffa ◽  
F. Ricci ◽  
...  
Keyword(s):  
Infrared Thermography ◽  
Sandwich Structure ◽  
Aluminium Foam ◽  
Low Velocity Impact ◽  
Low Velocity ◽  
Velocity Impact ◽  
Impact Tests

scholarly journals Experimental and Constitutive Model on Dynamic Compressive Mechanical Properties of Entangled Metallic Wire Material under Low-Velocity Impact

Materials ◽  
2020 ◽  
Vol 13 (6) ◽  
pp. 1396 ◽  
Author(s):  
Yiwan Wu ◽  
Shangzhou Li ◽  
Hongbai Bai ◽  
Lei Jiang ◽  
Hu Cheng
Keyword(s):  
Mechanical Properties ◽  
Constitutive Model ◽  
Relative Density ◽  
Energy Absorption ◽  
Low Velocity Impact ◽  
Low Velocity ◽  
Metallic Wire ◽  
Velocity Impact ◽  
Maximum Deformation ◽  
Wire Material

In this paper, the dynamic compressive mechanical properties of entangled metallic wire material (EMWM) under low-velocity impact were investigated and the constitutive model for EMWM under low-velocity impact was established. The research in this paper is based on a series of drop-hammer tests. The results show that the energy absorption rate of EMWM is in the range from 50% to 85%. Moreover, the EMWM with a higher relative density would not plastically deform macroscopically and has excellent characteristics of repetitive energy absorption. With the increase in relative density, the maximum deformation of EMWM decreases gradually, and the impact force of EMWM increases gradually. With the increase in impact-velocity, the phenomenon of stiffness softening before reaching the maximum deformation of EMWM becomes more significant. A constitutive model for EMWM based on the Sherwood–Frost model was established to predict the dynamic compressive mechanical properties of EMWM. The accuracy of the model was verified by comparing the calculated results with the experimental data of the EMWM with different relative densities under different impact-velocities. The comparison results show that the established model can properly predict the dynamic compressive mechanical characteristics of EMWM under low-velocity impact loading.

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

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

scholarly journals Dynamic Loading of Lattice Structure Made by Selective Laser Melting-Numerical Model with Substitution of Geometrical Imperfections

Materials ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 2129 ◽  
Author(s):  
Radek Vrána ◽  
Ondřej Červinek ◽  
Pavel Maňas ◽  
Daniel Koutný ◽  
David Paloušek
Keyword(s):  
Mechanical Properties ◽  
Numerical Model ◽  
Cross Section ◽  
Lattice Structure ◽  
Low Velocity Impact ◽  
Lattice Structures ◽  
Laser Melting ◽  
Low Velocity ◽  
Velocity Impact ◽  
Geometrical Imperfections

Selective laser melting (SLM) is an additive technology that allows for the production of precisely designed complex structures for energy absorbing applications from a wide range of metallic materials. Geometrical imperfections of the SLM fabricated lattice structures, which form one of the many thin struts, can lead to a great difference in prediction of their behavior. This article deals with the prediction of lattice structure mechanical properties under dynamic loading using finite element method (FEA) with inclusion of geometrical imperfections of the SLM process. Such properties are necessary to know especially for the application of SLM fabricated lattice structures in automotive or aerospace industries. Four types of specimens from AlSi10Mg alloy powder material were manufactured using SLM for quasi-static mechanical testing and determination of lattice structure mechanical properties for the FEA material model, for optical measurement of geometrical accuracy, and for low-velocity impact testing using the impact tester with a flat indenter. Geometries of struts with elliptical and circular cross-sections were identified and tested using FEA. The results showed that, in the case of elliptical cross-section, a significantly better match was found (2% error in the Fmax) with the low-velocity impact experiments during the whole deformation process compared to the circular cross-section. The FEA numerical model will be used for future testing of geometry changes and its effect on mechanical properties.

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