Lightweight weft-knitted tubular lattice composite for energy absorption applications: An experimental and numerical study

In this study, the energy absorption capacity of a front body of a bus during a frontal crash was investigated. The strength of the bus structure was examined by considering the ECE-R29 European regulation requirements. The nonlinear explicit finite element code LS-DYNA was used for the crash analyses. First, the baseline bus structures without any improvements were analyzed and the weak parts of the front end structure of the bus body were examined. Experimental tests are conducted to validate the finite element model. In the second stage, the bus structure was redesigned in order to strengthen the frontal body. Finally, the redesigned bus structure was compared with the baseline model to meet the requirements for ECE-R29. In addition to the redesign performed on the body, energy absorption capacity was increased by additional energy absorbers employed in the front of bus structure. This study experimentally and numerically investigated the energy absorption characteristics of a steering wheel armature in contact with a deformable mannequin during a crash. Variations in the location of impact on the armature, armature orientation, and mannequin were investigated to determine the effects of the energy absorption characteristics of the two contacting entities.

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Numerical Study on Impact Response of Aircraft Sandwich Wing Made of Fiber-Metal Laminate Face-Sheets Subjected to Bird Strike

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.488-489.8 ◽

2012 ◽

Vol 488-489 ◽

pp. 8-13 ◽

Cited By ~ 1

Author(s):

S.M.R. Khalili ◽

M. Assar ◽

R. Eslami Farsani ◽

I. Hajiyousefi

Keyword(s):

Energy Absorption ◽

Numerical Study ◽

Metal Layer ◽

Element Model ◽

Fiber Types ◽

Bird Strike ◽

Impact Phenomena ◽

Impact Responses ◽

Fiber Metal ◽

The Impact

Aircraft structures are frequently subjected to impacts from objects such as runway debris and birds. In new aircraft structural design, Fiber Metal Laminates (FMLs) play a significant role due to their excellent mechanical properties, particularly the impact properties. In this study, the aircraft sandwich wing with FML face-sheets are analyzed by finite element model for simulating the bird strike. The numerical simulations of bird strike impact are performed adopting a lagrangian approach to design the wing by MSC/PATRAN FE code. The numerical obtained results are compared with the results in the literature for validation of the model. The effect of fiber orientations, fiber types, metal types in FML face sheets in sandwich wing on impact responses are investigated. The impact responses are illustrated by displacement history, contact force history and energy absorption. According to these results, the sandwich panel with FML skin is suitable structure for energy absorption (that is the most important factor in impact phenomena). The lay-ups with titanium metal layer with aramid fibers are the best.

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A numerical study on energy absorption capability of lateral corrugated composite tube under axial crushing

International Journal of Crashworthiness ◽

10.1080/13588265.2019.1699721 ◽

2019 ◽

pp. 1-12 ◽

Cited By ~ 1

Author(s):

Majid Jamal-Omidi ◽

Ali Choopanian Benis

Keyword(s):

Energy Absorption ◽

Numerical Study ◽

Composite Tube ◽

Axial Crushing

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Experimental and Numerical Study of the Energy Absorbed with Various Thickness of Thin Rectangular and Square Sections

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.229-231.1120 ◽

2012 ◽

Vol 229-231 ◽

pp. 1120-1124

Author(s):

Sajjad Dehghanpour ◽

Sobhan Dehghanpour

Keyword(s):

Numerical Analysis ◽

Energy Absorption ◽

Cross Section ◽

Numerical Study ◽

Rectangular Cross Section ◽

Lateral Loading ◽

Thin Walled

Impact is one of very important subjects which always have been considered in mechanical science. Nature of impact is such that which makes its control a hard task. Therefore it is required to present the transfer of impact to other vulnerable part of a structure, when it is necessary, one of the best method of absorbing energy of impact , is by using Thin-walled tubes these tubes collapses under impact and with absorption of energy, it prevents the damage to other parts. Purpose of recent study is to survey the deformation and energy absorption of tubes with different type of cross section (rectangular or square) and with similar volumes, height, mean cross section, and material under loading. Lateral loading of tubes are quasi-static type and beside as numerical analysis, also experimental experiences has been performed to evaluate the accuracy of the results. Results from the surveys is indicates that in a same conditions which mentioned above, samples with square cross section ,absorb more energy compare to rectangular cross section, and also by increscent in thickness, energy absorption would be more.

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