scholarly journals Axial Impact Crushing Performance of Bi-tubular Structures with Stiffeners

2019 ◽  
Vol 9 (1) ◽  
pp. 3742-3746
Keyword(s):  
Finite Element ◽  
Tubular Structure ◽  
Tubular Structures ◽  
Simple Geometry ◽  
Thin Walled Tube ◽  
Thin Walled ◽  
Impact Crushing ◽  
Energy Absorbing ◽  
Impact Simulations ◽  
Absorbing Elements

Thin-walled tube shaped components have been expansively utilized as an impact energy dissipating devices in modern vehicles in order to decrease fatalities and vehicle damage during accidents. The present article investigates the axial crushing performance of bi-tubular structures of various configurations. Nonlinear impact simulations were performed on the proposed bi-tubular structure using finite element ABAQUS/CAE explicit code. From the outcomes attained, the Energy Absorption Capability (EAC) of bi-tubular structures with stiffeners were compared and it confirmed that bi-tubular structures have more potential than that of traditional simple geometry tubes. Furthermore, bi-tubular structure of circle section enclosed with square type section were recommended as significant one for superior EAC. This kind of bi-tubular structures was found to be proficient energy absorbing elements in vehicles to improve the crashworthiness performance

scholarly journals Crashworthiness Characteristics of Multi-Cell Tubular Structures Subjected to Axial Impact

2019 ◽  
Vol 8 (4) ◽  
pp. 3911-3915 ◽  
Keyword(s):  
Impact Energy ◽  
Deformation Behaviour ◽  
Initial Period ◽  
Geometrical Parameters ◽  
Tubular Structures ◽  
Axial Impact ◽  
Thin Walled ◽  
Energy Absorbing ◽  
Impact Simulations ◽  
The Impact

To mitigate the impact forces in crash events, thin-walled tubular elements are employed as an energy absorbing attenuators in frontal part of the automotive vehicles. To develop more progressive deformation modes, at the initial period, and to absorb more impact energy at the final period of crash, it is significant to enhance the crashworthiness performance of the tube by modifying its geometrical parameters. Multi-cell tubular structures have recognized to own superior impact energy absorbing ability and lightweight effect in the modern automotive vehicles. This research article examines the deformation behaviour of thin walled aluminum alloy multi-cell tube with different stiffeners exposed to axial impact loading using numerical simulation. Nonlinear impact simulations were performed on multi-cell tubes using finite element ABAQUS/CAE explicit code. From the overall results obtained, the deformation behaviour of multi-cell tubes was compared. Furthermore, hexagonal tubes with stiffeners were retained as most prominent for better energy dissipation. This type of tube was found to be most efficient type to enhance the crashworthiness performance during axial impact.

scholarly journals Influence of Material Properties on Automobile Energy-Absorbing Components Crashworthiness

2014 ◽  
Vol 8 (1) ◽  
pp. 113-116
Author(s):  
Liuyan Jie ◽  
Ding Lin
Keyword(s):  
Finite Element ◽  
Numerical Simulations ◽  
Material Properties ◽  
Simulation Analysis ◽  
Fe Method ◽  
Thin Walled Tube ◽  
Thin Walled ◽  
Energy Absorbing

In the present work, the simulation analysis of automobile energy-absorbing components was carried out using Finite Element (FE) method. The numerical simulations were carried out using the software LS-DYNA. Automobile energy-absorbing components usually were made of a metal thin walled tube. In the paper, several types of material properties were studied and compared. Results show that the material properties have influence to automobile energy - absorbing components crashworthiness.

scholarly journals Lateral Crushing and Energy Absorption Behavior of Multicellular Tube Structures

2019 ◽  
Vol 9 (1) ◽  
pp. 2684-2687 ◽  
Keyword(s):  
Finite Element ◽  
Energy Absorption ◽  
Simple Cell ◽  
The Novel ◽  
Lateral Impact ◽  
Tubular Structures ◽  
Multicellular Structure ◽  
Element Simulation ◽  
Thin Walled ◽  
Impact Simulations

Thin-walled metallic tubular elements are extensively employed as an impact energy attenuator in modern vehicles owing to light weight, easy fabrication and average cost. Besides, the novel multi-cell tubular structures have superior energy absorption characteristics related to a conventional simple cell tube. In this research article, the finite element simulation of thin-walled aluminium alloy extruded multicellular structure under lateral impact loading is investigated. Nonlinear impact simulations were performed on multicellular tubes of various configurations using finite element ABAQUS/CAE explicit code. From the outcomes attained, the energy absorption capability of various multicellular tube structures were compared and it shows that multicellular tubes have more remarkable than that of traditional simple cell tubes. Moreover, square shaped multicellular structure tube were retained as most prominent for higher energy absorption. This type of multicellular tubes was found to be effective one to improve the lateral crashworthiness performance

Crashing Behaviour Analysis of TWB Tubular Structures with Different Cross-Sections

2013 ◽  
Vol 814 ◽  
pp. 159-164
Author(s):  
Vlad Andrei Ciubotariu
Keyword(s):  
Finite Element ◽  
Cross Sections ◽  
Fuel Efficiency ◽  
Tubular Structures ◽  
Tailor Welded Blanks ◽  
Thin Walled Structures ◽  
Prediction And Control ◽  
Thin Walled ◽  
Crushing Behavior ◽  
Bimetallic Structures

The present paper investigates the crashing behavior and energy absorption characteristics of thin-walled (tubular) structures with different cross-sections made from tailor welded blanks (TWB) which were subject of axial quasistatic loadings. Resulted data were obtained by using explicit nonlinear finite element code LS_Dyna V971. Implementing the TWB into the auto industry was an efficient method to decrease the general weight of different structures. By far, these kind of bimetallic structures are largely utilized in auto and naval industries because it led to important decrease of scarp quantities and general manufacturing costs, improved material use and probably the most important, great fuel efficiency. After reviewing the literature it was concluded that proper combination between mechanical characteristics of sheet metals, different thicknesses and cross-section shapes into the same thin-walled structure is far too little researched and understood. The aims of this study are better understandings of the crashing behavior regarding thin-walled structure with various cross-sections made from TWB blanks subject to quasistatic loadings. The non-linear finite element platform LS_Dyna V971 was used for the numerical analysis of the crushing behavior regarding the thin-walled structures. Having two materials constituting the thin-walled structures, the crashing behavior changed during the quasistatic loading. Thus, the crashing inertia of the structure is somehow limited and controlled. It is noted that material ratio should not be randomly chosen due to the unexpected crashing mode which could aggravate the prediction and control of the crashing behavior of the thin-walled structure.

Study on Factors of Axial Crushing of Thin-Walled High-Strength Steel Sections Used in Passenger Car

2014 ◽  
Vol 989-994 ◽  
pp. 898-902
Author(s):  
Gui Fan Zhao ◽  
Yao Wei Hu ◽  
Xiao Cheng ◽  
Ke Xiao
Keyword(s):  
Finite Element ◽  
High Strength Steel ◽  
Spot Welding ◽  
High Strength ◽  
Element Model ◽  
Welding Seam ◽  
Seam Welding ◽  
Thin Walled Tube ◽  
Steel Sections ◽  
Thin Walled

This paper firstly studied the structure of front longitudinal, then reviewing comprehensive literature draw the similarity of collision of the thin-walled tube and front longitudinal,finally ensure the study of collision of the thin-walled tube. And establishing three kinds of thin-walled welded rectangular beam finite element model of spot welding, seam welding and laser welding, arrive a more superior technology through researching and analyzing the model.

Design Uncertainty Effects Quantification Using Monte Carlo Simulation

2012 ◽  
Author(s):  
Hesham Kamel
Keyword(s):  
Monte Carlo Simulation ◽  
Finite Element ◽  
Monte Carlo ◽  
Rigid Wall ◽  
Design Variables ◽  
Element Simulation ◽  
Thin Walled Tube ◽  
Final Deformation ◽  
Thin Walled ◽  
Dynamic Impact Loading

This paper presents an approach to evaluate the effect of uncontrolled and un-avoided variation within design variables on the performance of nonlinear finite element models. The approach employs Monte Carlo simulation to reveal this effect using descriptive statistics to present useful information to the designer. A case study of a thin walled tube under dynamic impact loading is used to demonstrate the proposed approach. The thin walled tube is modeled using LS-DYNA for finite element simulation. Wall thickness distributions are selected as design variables where the amount of impact energy absorbed, maximum rigid wall force and final deformation are selected as the important responses. The results clearly show that the proposed approach can provide the designer with useful information of the effect of variation within the design variables on the structure responses. Ultimately, the designer can use this helpful information in creating a design that is minimally sensitive to those uncontrolled and un-avoided variation within design variables.

Experimental analysis on the axial crushing and energy absorption characteristics of novel hybrid aluminium/composite-capped cylindrical tubular structures

2019 ◽  
Vol 233 (11) ◽  
pp. 2234-2252 ◽  
Author(s):  
A Praveen Kumar
Keyword(s):  
Energy Absorption ◽  
Specific Energy ◽  
Cylindrical Tube ◽  
Tubular Structures ◽  
Aluminium Composite ◽  
Specific Energy Absorption ◽  
Cylindrical Tubes ◽  
Impact Crushing ◽  
Energy Absorbing ◽  
The Impact

In recent years, aluminium-composite hybrid tubular structures, which combine the stable and progressive plastic deformation of the aluminium metal with light-weight composite materials, are obtaining increased consideration for meeting the advanced needs of crashworthiness characteristics. This research article presents the experimental outcomes of novel aluminium/composite-capped cylindrical tubes subjected to quasi-static and impact axial loads. The influence of various capped geometries in the aluminium segment and three different fabrics of the composite segment in the cylindrical tube are investigated experimentally. The outcomes of the impact crushing test are also correlated with the quasi-static results of the proposed aluminium/composite-capped cylindrical tubes. The overall outcomes revealed that the crashworthiness characteristics of crushing force consistency and specific energy absorption of the aluminium-composite hybrid tubes are superior to those of the bare aluminium tubes. When the glass fabric/epoxy composite is wrapped to aluminium cylindrical tubes, the specific energy absorption increases about 23–30%, and the wrapping of hybrid glass/kenaf fabrics increases the specific energy absorption of almost 40–52%. Such a hybrid tubular structures would be of huge prospective to be used as effective energy-absorbing devices in aerospace and automotive applications. A further benefit of the composite-wrapping approach is that the composite might be retro-fitted to aluminium tubes, and the energy absorption capability is shown to be significantly enhanced by such utilization.

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