Parametric study of a fibrous energy absorbing material under impact shear loading

2020 ◽  
Vol 232 ◽  
pp. 111583
Author(s):  
Jared Correia ◽  
Vijaya Chalivendra ◽  
Yong Kim
Keyword(s):  
Parametric Study ◽  
Shear Loading ◽  
Absorbing Material ◽  
Energy Absorbing

Bioinspired energy absorbing material designs using additive manufacturing

2021 ◽  
Vol 119 ◽  
pp. 104518
Author(s):  
Aniket Ingrole ◽  
Trevor G. Aguirre ◽  
Luca Fuller ◽  
Seth W. Donahue
Keyword(s):  
Additive Manufacturing ◽  
Absorbing Material ◽  
Energy Absorbing

scholarly journals Investigation of Energy-Absorbing Properties of a Bio-Inspired Structure

Metals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 881
Author(s):  
Adrian Dubicki ◽  
Izabela Zglobicka ◽  
Krzysztof J. Kurzydłowski
Keyword(s):  
Absorption Capacity ◽  
Compression Tests ◽  
Element Analysis ◽  
Lightweight Structures ◽  
New Energy ◽  
Absorbing Material ◽  
Lightweight Structure ◽  
3D Printed ◽  
Deformation Force ◽  
Energy Absorbing

Numerous engineering applications require lightweight structures with excellent absorption capacity. The problem of obtaining such structures may be solved by nature and especially biological structures with such properties. The paper concerns an attempt to develop a new energy-absorbing material using a biomimetic approach. The lightweight structure investigated here is mimicking geometry of diatom shells, which are known to be optimized by nature in terms of the resistance to mechanical loading. The structures mimicking frustule of diatoms, retaining the similarity with the natural shell, were 3D printed and subjected to compression tests. As required, the bio-inspired structure deformed continuously with the increase in deformation force. Finite element analysis (FEA) was carried out to gain insight into the mechanism of damage of the samples mimicking diatoms shells. The experimental results showed a good agreement with the numerical results. The results are discussed in the context of further investigations which need to be conducted as well as possible applications in the energy absorbing structures.

714 Dynamic characteristic of polyurethane elastomer as energy-absorbing material

2005 ◽  
Vol 2005.80 (0) ◽  
pp. _7-27_-_7-28_
Author(s):  
Koji MIMURA ◽  
Tsumoto UMEDA ◽  
Wei LU ◽  
Shingo HATSUDA
Keyword(s):  
Dynamic Characteristic ◽  
Polyurethane Elastomer ◽  
Absorbing Material ◽  
Energy Absorbing

Evans blue: An ideal energy-absorbing material to produce intravascular microinjury by HeNe gas laser

1975 ◽  
Vol 10 (1) ◽  
pp. 107-124 ◽  
Author(s):  
Iren B. Kovács ◽  
A. Tigyi-Sebes ◽  
K. Trombitás ◽  
P. Görög
Keyword(s):  
Evans Blue ◽  
Gas Laser ◽  
Absorbing Material ◽  
Energy Absorbing

CRASHWORTHINESS DESIGN OF THE SHEAR BOLTS FOR LIGHT COLLISION SAFETY DEVICES

2008 ◽  
Vol 22 (31n32) ◽  
pp. 5603-5608 ◽  
Author(s):  
JIN SUNG KIM ◽  
HOON HUH ◽  
TAE SOO KWON
Keyword(s):  
High Speed ◽  
Compressive Loading ◽  
Shear Loading ◽  
Crash Test ◽  
Main Body ◽  
Safety Devices ◽  
Dynamic Experiments ◽  
Collision Safety ◽  
Crashworthiness Design ◽  
Energy Absorbing

This paper introduces the jig set for the crash test and the crash test results of shear bolts which are designed to fail at train crash conditions. The tension and shear bolts are attached to Light Collision Safety Devices(LCSD) as a mechanical fuse when tension and shear bolts reach their failure load designed. The kinetic energy due to the crash is absorbed by the secondary energy absorbing device after LCSD are detached from the main body by the fracture of shear bolts. A single shear bolt was designed to fail at the load of 250 kN. The jig set designed to convert a compressive loading to a shear loading was installed to the high speed crash tester for dynamic shear tests. Two strain gauges were attached at the parallel section of the jig set to measure the load responses acting on the shear bolts. Crash tests were performed with a carrier whose mass was 250 kg and the initial speed of the carrier was 9 m/sec. From the quasi-static and dynamic experiments as well as the numerical analysis, the capacity of the shear bolts were accurately predicted for the crashworthiness design.

scholarly journals Influence of Grains Shape Irregularity in Porous Ceramics—Numerical Study

Materials ◽  
2020 ◽  
Vol 13 (8) ◽  
pp. 1944
Author(s):  
Danuta Miedzińska
Keyword(s):  
Finite Element ◽  
Numerical Study ◽  
Computer Code ◽  
Porous Ceramics ◽  
Ceramic Foam ◽  
Fe Model ◽  
Strength Behavior ◽  
Absorbing Material ◽  
Shape Irregularity ◽  
Energy Absorbing

The presented study deals with the analysis of the stochastic geometry of grains on ceramic foam strength behavior. A microstructural finite element (FE) model of a grainy structure of such a material was developed and stochastic changes to the grain geometry (initially of a regular cubic shape) were introduced. The numerical compression test of a series of finite element models was carried out with the use of LS Dyna computer code. To consider the ceramic specific behavior, the Johnson Holmquist constitutive model was implemented with parameters for alumina. The influence of the stochastic irregularities on the ceramic foam strength was observed—the geometry changes caused an increase in the maximum stress, which could be the basis for the indication that the production of the energy absorbing material should be based on mostly irregular grains.

Characterization of Polyethylene Foams under Compressive Impact Loading

2005 ◽  
Vol 480-481 ◽  
pp. 513-518 ◽  
Author(s):  
J.L. Ruiz-Herrero ◽  
Miguel A. Rodríguez-Pérez ◽  
Jose A. de Saja
Keyword(s):  
Energy Absorption ◽  
Impact Loading ◽  
Energy Impact ◽  
Optimum Energy ◽  
Rapid Loading ◽  
Protected Object ◽  
Absorbing Material ◽  
Energy Absorbing ◽  
The Impact

It has long been recognized that the mechanical behaviour of materials under conditions of rapid loading and impact differs significantly from that under static load application [1].These differences are specially important for those materials as polymeric foams used as low energy impact absorbing materials[2]. An optimum energy absorbing material needs to dissipate the kinetic energy of the impact while keeping the force on it below some limit, thus resulting in a no-dangerous deceleration of the protected object[3]. The mechanical properties at room temperature of six polyethylene foams with closed cells and different densities have been evaluated in purely compressive impact loading conditions. The energy absorption characteristics have been evaluated through different parameters as the peak of deceleration, the load transmitted, the maximum strain and the impact time. The peak of deceleration is used to obtain the cushion diagrams at five different heights, useful to design energy absorption structures.

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