scholarly journals Design condition of a sustainable two-layer circular tube with energy absorbing capacity

2013 ◽  
Author(s):  
A. Nomura ◽  
E. Ueda ◽  
T. Wada ◽  
S. Enoki
Keyword(s):  
Circular Tube ◽  
Energy Absorbing

scholarly journals Energy Absorption Characteristics of Foam Filled Tri Circular Tube under Bending Loads

2021 ◽  
Vol 15 ◽  
pp. 159-164
Author(s):  
Fauzan Djamaluddin
Keyword(s):  
Energy Absorption ◽  
Failure Modes ◽  
Circular Tube ◽  
Comparative Investigation ◽  
Tubular Structures ◽  
Vehicle Engineering ◽  
Bending Resistance ◽  
Bending Loads ◽  
Foam Filled ◽  
Energy Absorbing

In this study, the researcher carried out a comparative investigation of the crashworthy features of different tubular structures with a quasi-static three bending point, like the foam-filled two and tri circular tube structures. Energy absorption capacities and failure modes of different structures are also studied. Furthermore, the general characteristics are investigated and compared for instance the energy absorption, specific energy absorption and energy-absorbing effectiveness for determining the potential structural components that can be used in the field of vehicle engineering. Experimental results indicated that under the bending conditions, the tri foam-filled structures were higher crashworthiness behaviour than the two foam-filled circular structures. Therefore, this study recommended the use of crashworthy structures, such as foam-filled tri circular tubes due to the increased bending resistance and energy-absorbing effectiveness.

scholarly journals Dynamics and Strength of Circular Tube Open Wagons with Aluminum Foam Filled Center Sills

Materials ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 1915
Author(s):  
Oleksij Fomin ◽  
Mykola Gorbunov ◽  
Alyona Lovska ◽  
Juraj Gerlici ◽  
Kateryna Kravchenko
Keyword(s):  
Mathematical Modeling ◽  
Aluminum Foam ◽  
Natural Frequencies ◽  
Circular Tube ◽  
Dynamic Loads ◽  
Oscillation Modes ◽  
Absorbing Material ◽  
Foam Filled ◽  
Energy Absorbing ◽  
Tube Structure

The study deals with an application of aluminum foam as an energy-absorbing material for the carrying structure of a rail car. The material is particularly recommended for circular tube carrying structures. The authors conducted mathematical modeling of dynamic loads on the carrying structure of an open wagon that faces shunting impacts with consideration of the center sill filled with aluminum foam. It was established that the maximum accelerations on the carrying structure of an open wagon were 35.7 m/s2, which was 3.5% lower in comparison with those for a circular tube structure without a filler. The results obtained were proved by computer modeling. The strength of the carrying structure of an open wagon was also calculated. It was established that aluminum foam applied as a filler for the center sill decreased the maximum equivalent stresses in the carrying structure of an open wagon by about 5% and displacements by 12% in comparison with those involving the circular tube carrying structure of an open wagon without a filler. The natural frequencies and the oscillation modes of the carrying structure of an open wagon were defined. The designed models of the dynamic loading of the carrying structure of an open wagon were verified with an F-test.

Dynamic Mechanical Behaviors of Aluminium Foam Filled Circular Tubes under Transverse Compressive Load

2007 ◽  
Vol 340-341 ◽  
pp. 397-402
Author(s):  
Xiao Qing Zhang ◽  
Xiao Qing Huang ◽  
Yi Ping Liu ◽  
Li Qun Tang ◽  
Shan Li Liang
Keyword(s):  
Finite Element ◽  
Bearing Capacity ◽  
Circular Tube ◽  
Outer Tube ◽  
Aluminium Foam ◽  
Mechanical Behaviors ◽  
Load Bearing Capacity ◽  
Load Bearing ◽  
Dynamic Mechanical ◽  
Energy Absorbing

The experimental studies on the static and dynamic mechanical properties of aluminium foam material are presented first. Finite element models of four structures, including circular tube filled and bonded with aluminium foam, circular tube filled but unbonded with aluminium foam, single aluminium foam column and empty aluminium tube, under dynamic transverse compression are established by FEMB code. The dynamic mechanical behaviors of the structures are analyzed using LS-DYNA finite element code. The simulating results at certain cases are compared with experimental measurements and the satisfying consistency confirmed the validity of the model. The further numerical simulations are carried on the dynamic mechanical behaviors of four structures with outer tubes of different wall-thickness. It is found that aluminium foam filling can greatly improve the load-bearing capacity and energy-absorbing efficiency of structures. On the other hand, the effect of the aluminium outer tube on the structure is obvious compared with single aluminium foam column, in spite of the foam core and the tube are bonded together or unbonded. Another result can be seen that the bonding between the foam and outer tube affects the structure weakly for both thinner and thicker tubes. Finally, the simulating results show that the thicker wall of tube can improve the load-bearing capacity and energy-absorbing ability of the structure.

Some Specific Features of the Flow and Heat Exchange of Dissociated Gas in a Circular Tube

1998 ◽  
Vol 29 (4-5) ◽  
pp. 294-299
Author(s):  
A. A. Vasil'yev ◽  
V. F. Vishnyak ◽  
I. I. Didenko ◽  
V. N. Panchenko
Keyword(s):  
Heat Exchange ◽  
Circular Tube
Sign in / Sign up

Export Citation Format

Share Document