Quasi-Static Energy Absorption of Pultruded Composite Tubes E-Glass/Polyester under Oblique Loading with Different Cross-Section

2011 ◽  
Vol 341-342 ◽  
pp. 843-847 ◽  
Author(s):  
Abdullah Atiq Arifin ◽  
Abu Bakar Sulong
Keyword(s):  
Energy Absorption ◽  
Cross Section ◽  
Thick Wall ◽  
Composite Tubes ◽  
Trigger Mechanism ◽  
Polyester Composite ◽  
Static Energy ◽  
And Behavior ◽  
Oblique Load ◽  
The Impact

The capable of structures to absorb large amount energy are great interest in an effort to reduce the impact of collision. In this research, an experimental investigation was carried out to study the crashworthiness parameter and behavior of pultruded fiber E-glass/polyester composite tubes subjected to oblique load during progressive collapses. Two different pultruded wall thicknesses of 6 mm and 9 mm tubes were used and four load angles of 0˚, 5˚, 10˚ and 15˚ were selected to study their effect on crushing behaviors and collapse modes. All specimens were chamfer 45˚ on top end as purpose to work as a collapse trigger mechanism. The result showed that increasing the angle of loading will decrease the energy absorption of the structures. Pultruded tubes with 9 mm thick wall absorb more energy compare to 6 mm thick walls.

Impact Response and Energy Absorption of Aluminium Foam-Filled Tubes

2012 ◽  
Vol 152-154 ◽  
pp. 436-439 ◽  
Author(s):  
Yang An ◽  
Cui E Wen ◽  
Peter D. Hodgson ◽  
Chun Hui Yang
Keyword(s):  
Energy Absorption ◽  
Experimental Test ◽  
Computational Simulation ◽  
Aluminium Foam ◽  
Impact Response ◽  
Composite Tubes ◽  
Impact Behaviour ◽  
Foam Filled ◽  
The Impact

The effect of foam fillers on the impact behaviour and energy absorption of an aluminium tube is investigated. Both experimental test and computational simulation are employed in current study. For comparison, hollow tubes and foams are also tested, respectively. Foam filler is found to be ineffective in increasing the crushing loads of the composite tubes over the simple superposition of the crushing loads of hollow tube and foam. Also, foam filler increases the tendency for the concertina mode of folding. The foam fillers of tubes additionally result in increasing the SAE values over those of hollow tubes.

Influence of the Cross Section Shape on Energy Absorbing Component of Bumper Subjected to Low Speed Crash

2013 ◽  
Vol 477-478 ◽  
pp. 3-6
Author(s):  
Yan Jie Liu ◽  
Lin Ding
Keyword(s):  
Energy Absorption ◽  
Cross Section ◽  
Peak Load ◽  
Low Velocity Impact ◽  
Fe Model ◽  
Cross Section Shape ◽  
Section Shape ◽  
The Cross ◽  
Energy Absorbing ◽  
The Impact

Energy absorbing component of bumper equipped at the front end of a car, is one of the most important automotive parts for crash energy absorption. It usually was made a mental thin walled tube. In the paper, automobile energy absorbing component at low-velocity impact was studied by using Finite Element Method. The FE model of the tube was builded by comparing the five cross section shape . Results show that the impact peak load and maximum energy absorption have certain effect to energy-absorbing component with different the cross section shape.

Analysis of Energy Absorption on Pultruded Composite Tube under Oblique Loading

2011 ◽  
Vol 471-472 ◽  
pp. 215-220 ◽  
Author(s):  
Abu Bakar Sulong ◽  
Abdullah Atiq Ariffin ◽  
Jaafar Sahari ◽  
Hendra Suherman
Keyword(s):  
Energy Absorption ◽  
Wall Thickness ◽  
Impact Energy ◽  
Compression Moulding ◽  
Composite Tubes ◽  
Trigger Mechanism ◽  
Composite Tube ◽  
Automotive Structures ◽  
Oblique Loading ◽  
Force Displacement

The capability of structures to absorb as much amount energy, particularly in automotive structures to reduce the damages due to impact energy during collision attract attention of many reserachers. During the actual collision, the crash box is not only experienced axially crash, but also in oblique crash. In this study, an experiment was carried out to study the crashworthiness parameters and behaviour of pultruded fibre E-glass/polyester pultruded composite tubes under oblique loading. Quasi-static loadings were applied axially and oblique on the pultruded composite to investigate the response of force-displacement during progressive collapses. The pultruded wall thickness of 6 mm tubes were used and four oblique angles of 0˚, 5˚, 10˚ and 15˚ were selected to study their effect on crushing behaviours and collapse modes using compression moulding. All specimens were chamfer 45˚ on top end for purpose to work as a collapse trigger mechanism. The results showed that the energy absorption of the structures increasing with decrease of the loading angle.

Impact and Energy Absorption of TWB Thin-Walled Structures with Polygonal Cross-Sections

2014 ◽  
Vol 1036 ◽  
pp. 686-691
Author(s):  
Vlad Andrei Ciubotariu ◽  
Aurelian Albut
Keyword(s):  
Kinetic Energy ◽  
Energy Absorption ◽  
Cross Section ◽  
Maximum Level ◽  
Strain History ◽  
Main Role ◽  
Construction Technique ◽  
Thin Walled Structures ◽  
Thin Walled ◽  
The Impact

Nowadays, thin-walled structures and different materials destined to absorb kinetic energy initiated a great interest among the researchers from the auto, naval, military industries even from the protection equipment production industry. The main role of these structures is to absorb and dissipate the kinetic energy so the maximum level of deceleration to be limited. Thus, the structures collapse through progressive buckling. The aim is to control this progressive buckling as efficient as possible through the collapse mode or the construction technique. This collapsing mode is well described and characterised by the international literature [.The plastic strain history of the components constituting the thin-walled structure is very important because each bending, stretching process or tensioning brings with it self-a series of transformations which compete to influence the dynamic response of this kind of structures [2].In this study, all the above presented aspects were taken into consideration in the analysis of the impact and energy absorption behaviour regarding thin-walled structures by using explicit nonlinear finite element code LS_Dyna V971. The thin-walled structures involved in this research are made from tailor welded blanks (TWB) and were subject of axial impact crashing tests. There were used three types of cross-section shapes: rectangular, pentagonal and hexagonal. In order to have a fare comparison study, all the studied structures had a 250mm cross-section perimeter and a height of 250mm, also. Each structure is constituted from four, five or six sheet metal parts bonded together.

Effect of surface geometry on low-velocity impact behavior of laminated aramid-reinforced polyester composite

2016 ◽  
Vol 50 (29) ◽  
pp. 4077-4091 ◽  
Author(s):  
Ali İmran Ayten ◽  
Bülent Ekici ◽  
Arif Nihat Güllüoǧlu
Keyword(s):  
Energy Absorption ◽  
Volume Fraction ◽  
Low Velocity Impact ◽  
Surface Geometry ◽  
Low Velocity ◽  
Velocity Impact ◽  
Impact Tests ◽  
Polyester Composite ◽  
The Impact ◽  
Effect Of Surface

The aim of this study is to investigate the effect of surface geometry for low-velocity impact applications. To achieve this purpose, aramid fiber-reinforced laminated polyester composite with various geometries such as cylindrical, elliptical, and spherical were prepared, and low-velocity impact properties were investigated numerically and experimentally. All properties such as orientation, fiber volume fraction, matrix material, and average thickness are the same in all samples. Experimental low-velocity impact behaviors of structure were determined by drop weight tester at low velocity 2.012 m/s. Simulations were carried out by LS-Prepost 4.2 and LS-Dyna v971 software. By this way, results of impact tests were verified and modeled with finite element method. Results of the impact tests showed that the elliptical samples have the highest energy absorption capability due to effective stress transfer capacity. According to experimental results, maximum energy absorption rate difference is 17% between elliptical 10 mm and cylindrical 5 mm geometries.

scholarly journals Crashworthiness Characteristics and Failure Mode of Composite Tubes

2020 ◽  
Vol 9 (3) ◽  
pp. 2744-2749
Keyword(s):  
Energy Absorption ◽  
Failure Mode ◽  
Experimental Work ◽  
Absorbed Energy ◽  
Composite Tubes ◽  
Plain Weave ◽  
Aspect Ratios ◽  
The Impact

The woven plain weave/epoxy hexagonal tubes’ capacity for energy absorption is investigated in present work. The experimental work was performed on composite hexagons with different hexagonal angles between 35° and 55° in aspect ratios L/t = 70 and 10° angular increments. Observation was made on how the configuration impacts the crash-worthiness behavior of the reinforced hexagonal tubes. Moreover, the impact on absorbed energy was also investigated. The highest energy absorption capability and average crashing load was demonstrated by the woven plain weave/epoxy hexagonal tube with β = 45°. Failure of the woven plain weave/epoxy hexagonal tube was found to be in progressive mode. Furthermore, apart from the influence of geometry, the energy absorption capabilities of the hexagonal tubes were also affected by the type of material.

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