scholarly journals Mechanical Behavior of Entangled Metallic Wire Materials under Quasi-Static and Impact Loading

Materials ◽  
2019 ◽  
Vol 12 (20) ◽  
pp. 3392 ◽  
Author(s):  
Yiwan Wu ◽  
Lei Jiang ◽  
Hongbai Bai ◽  
Chunhong Lu ◽  
Shangzhou Li
Keyword(s):  
Energy Absorption ◽  
Impact Loading ◽  
Absorption Rate ◽  
Maximum Load ◽  
Low Velocity Impact ◽  
Low Velocity ◽  
Metallic Wire ◽  
Maximum Deformation ◽  
Air Damping ◽  
Stiffness And Damping

In this paper, the stiffness and damping property of entangled metallic wire materials (EMWM) under quasi-static and low-velocity impact loading were investigated. The results reveal that the maximum deformation of the EMWM mainly depends on the maximum load it bears, and that air damping is the main way to dissipate impact energy. The EMWM can absorb more energy (energy absorption rate is over 60%) under impact conditions. The EMWM has excellent characteristics of repetitive energy absorption.

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 Impact Analysis of Carbon/Glass/Epoxy Hybrid Composite Pipes

2019 ◽  
Vol 8 (4) ◽  
pp. 6002-6006
Keyword(s):  
Energy Absorption ◽  
Impact Analysis ◽  
Energy Levels ◽  
Maximum Load ◽  
Low Velocity Impact ◽  
Internal Diameter ◽  
Low Velocity ◽  
Glass Carbon ◽  
Composite Pipes ◽  
The Impact

Filament winded composite pipes are used in various environments conditions for different applications. In this study filament winded hybrid (Glass/Carbon/Epoxy) composite pipes with interwoven (CG90/CG60) orientation were tested under various low velocity impact conditions for two different thickness. Internal diameter as 50 mm with various thicknesses such as 4 mm, 6mm are used to study the effect of impact. The impact test conducted at three different energy levels as 20 J, 25 J and 30 J. Effect of impact on these pipes were measured by the comparison of energy absorption, force and deformation values. The results shows that increasing thickness of specimens increase maximum load carrying capacity and reduces the energy absorption and deformation of impacted specimens

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.

Comparative Study of Different Weave Architectures of Woven Textile Composites Under Low Velocity Impact Loading

2008 ◽  
Author(s):  
Gautam S. Chandekar ◽  
Ajit D. Kelkar ◽  
Ram V. Mohan ◽  
Bhushan S. Thatte
Keyword(s):  
Impact Loading ◽  
Maximum Load ◽  
Maximum Energy ◽  
Textile Composites ◽  
Low Velocity Impact ◽  
Manufacturing Cost ◽  
Low Velocity ◽  
Velocity Impact ◽  
Out Of Plane ◽  
Woven Textile

Fiberglass epoxy laminates are strong in out-of-plane loading such as low velocity impact. Woven textile composites have better properties in mutually orthogonal and out of plane directions than the unidirectional laminates. Along with the improvement in properties, they have low manufacturing cost since much of the fabrication can be automated. In the present study, different weave architectures such as basket weave, twill weave, 4 harness satin and 8 harness satin were studied numerically for response under low velocity impact loading. Main consideration was given to the maximum load carrying capacity and maximum energy absorbed by the laminates. All numerical investigations were performed using LS-DYNA® software. The laminates were modeled in VPG using 3D solid elements in a mosaic fashion to represent different weave patterns. Mechanical properties were calculated by classical micro-mechanical theory and assigned to the elements.

Energy-Absorbing Capacity of Polyurethane/SiC/Glass-Epoxy Laminates Under Impact Loading

2017 ◽  
Vol 139 (2) ◽  
Author(s):  
G. Balaganesan ◽  
V. Akshaj Kumar ◽  
V. C. Khan ◽  
S. M. Srinivasan
Keyword(s):  
Energy Absorption ◽  
Impact Loading ◽  
Composite Laminate ◽  
Failure Modes ◽  
Impact Testing ◽  
Low Velocity Impact ◽  
Low Velocity ◽  
Fiber Failure ◽  
The Impact ◽  
Layered Target

This paper presents the energy absorption of target materials with combinations of polyurethane (PU) foam, PU sheet, SiC inserts, and SiC plate bonded to glass fiber reinforced composite laminate backing during impact loading. SiC inserts and SiC plates are bonded as front layer to enhance energy absorption and to protect composite laminate. The composite laminates are prepared by hand lay-up process and other layers are bonded by using epoxy. Low-velocity impact is conducted by using drop mass setup, and mild steel spherical nosed impactor is used for impact testing of target in fixed boundary conditions. Energy absorption and damage are compared to the target plates when subjected to impact at different energy levels. The energy absorbed in various failure modes is analyzed for various layers of target. Failure in the case of SiC inserts is local, and the insert under the impact point is damaged. However, in the other cases, the SiC plate is damaged along with fiber failure and delamination on the composite backing laminate. It is observed that the energy absorbed by SiC plate layered target is higher than SiC inserts layered target.

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
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