Theoretical development and numerical analysis on the energy absorption of tapered multi-cell automotive structures under oblique impacts

2021 ◽  
pp. 1-19
Author(s):  
Ali Khorasani ◽  
Hamed Saeidi Googarchin
Keyword(s):  
Numerical Analysis ◽  
Energy Absorption ◽  
Theoretical Development ◽  
Automotive Structures ◽  
Oblique Impacts

scholarly journals Numerical analysis for design of bioinspired ceramic modular armors for ballistic protections

2018 ◽  
Vol 28 (6) ◽  
pp. 815-837 ◽  
Author(s):  
VF González-Albuixech ◽  
M Rodríguez-Millán ◽  
T Ito ◽  
JA Loya ◽  
MH Miguélez
Keyword(s):  
Numerical Analysis ◽  
Energy Absorption ◽  
Crack Arrest ◽  
Fish Scales ◽  
Multiple Impacts ◽  
Surface Protection ◽  
Oblique Impacts ◽  
Natural Protection ◽  
Yaw Angle ◽  
Localized Damage

The exigent requirements for personal protections in terms of energy absorption and ergonomics have led to increasing interest in bioinspired protections. This work focuses on the numerical analysis of ballistic behavior of different bioinspired geometries under impact loadings. Ceramic armors based on ganoid fish scales (the type exhibited by gars, bichirs and reedfishes), placoid fish scales (characterizing sharks and rays) and armadillo natural protection have been considered. Different impact conditions are studied, including perpendicular and oblique impacts to surface protection, different yaw angle, and multiple impacts. Main conclusion is related to the improved efficiency of modular armors against multiple shots exhibiting more localized damage and crack arrest properties. Moreover, its potential ergonomic is a promising characteristic justifying a deeper study.

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

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.

Pole and Vehicle Energy Absorption in Lateral Oblique Impacts with Rigid and Frangible Poles

2008 ◽  
Author(s):  
C. Brian Tanner ◽  
H. Fred Chen ◽  
Philip Cheng ◽  
Dennis A. Guenther
Keyword(s):  
Energy Absorption ◽  
Oblique Impacts

Simulation and Numerical Analysis of Crashworthiness Behaviour of Thin Walled Structure

2017 ◽  
Vol 9 (1) ◽  
Author(s):  
D. Yesuraj ◽  
M.S.P.P. Vallavaraayan ◽  
S. Selvaraj
Keyword(s):  
Mathematical Model ◽  
Numerical Analysis ◽  
Energy Absorption ◽  
Steel Tube ◽  
Material Structure ◽  
Processing Conditions ◽  
Geometry Processing ◽  
Specific Energy Absorption ◽  
Thin Walled ◽  
Testing Speed

The purpose of this work is to find the specific energy absorption (SEA) of a steel tube using ABAQUS/CAE V6.10. Crashworthiness of a structure is characterised by the absorbed more amount of energy while the structure is subjected to an impact. A material structure should safeguard the occupants during an impact. The specimen geometry, processing conditions, and testing speed are the dependent parameters of energy absorption. It aims to determine the generalized mathematical model to evaluate the SEA and also find the parameter that is most likely affects SEA. Simulations are also carried out in ABAQUS/CAE to validate the developed numerical analysis.

Numerical and Experimental Study on Railway Impact Energy Absorption Using Tube External Inversion Mechanism at Real Scale

2006 ◽  
Vol 306-308 ◽  
pp. 315-320 ◽  
Author(s):  
Ign Wiratmaja Puja ◽  
A. Khairullah ◽  
Muhammad Agus Kariem ◽  
A.H. Saputro
Keyword(s):  
Experimental Study ◽  
Numerical Analysis ◽  
Energy Absorption ◽  
Contact Force ◽  
Impact Energy ◽  
Experimental Result ◽  
Energy Absorber ◽  
The Impact ◽  
Inversion Mechanism ◽  
Real Scale

Impact energy and deceleration at a certain time are the most influenced factor to passenger’s safety when collision between railway vehicles occurred. In this paper, forced external inversion mechanism is considered as impact energy absorber. This mechanism is selected due to its constant inversion load along uniform tube [5] and the impact force is reduced because of its inertia effect [7]. Material used as energy absorber is mild steel. Numerical analysis using finite element method is utilized to study the energy absorption capacity and deceleration characteristic of tube external inversion mechanism for complex transient problem of collision. The real scale experimental study is used to validate the numerical analysis by crashing a moving vehicle to static train series where the impact energy absorber module using external inversion mechanism is attached in the tip of static train series. Characteristic that consider in numerical and experimental study are deformation and contact force. The deformation differences between numerical and experimental study are under 9%. Whereas for contact force, the experimental result of contact force disposed under 8% of numerical result for velocity of moving train at 10 and 15 km/h.

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