scholarly journals Oblique Impact on Crashworthiness: Review

2017 ◽  
Vol 4 (2) ◽  
pp. 32-48
Author(s):  
Tan Sze Pei ◽  
Siti Nadiah Mohd Saffe, ◽  
Siti Aishah Rusdan ◽  
Nurul Nadiah Nor Hamran
Keyword(s):  
Axial Loading ◽  
Oblique Impact ◽  
Loading Conditions ◽  
Structural Components ◽  
Energy Absorber ◽  
Oblique Loading ◽  
Foam Filled ◽  
Thin Walled ◽  
Collapse Behavior

This paper reviewed the crashworthiness of foam-filled thin-walled structure subjected to oblique loading conditions. Crashworthiness is the most important part in designing a safety vehicle, so, the types of collisions, crashworthiness parameter and the modes of collapse of structural components are included in this part. Secondly, the energy absorber regarding the axial loading and oblique loading in terms of geometry parameters and materials of the previous research is reviewed. In addition, the manufacturing and properties of aluminium foams with the collapse behavior of foam-filled structures are studied to understand the performance and the relation under loading.

Collapse behavior of thin-walled cylinder tubes under quasi-static axial loading

2020 ◽  
Author(s):  
Hayder A. H. Al-Shemmary ◽  
Fadhil Hashim ◽  
Sura Salim
Keyword(s):  
Axial Loading ◽  
Thin Walled ◽  
Collapse Behavior ◽  
Walled Cylinder

Optimization of foam-filled double circular tubes under axial and oblique impact loading conditions

2015 ◽  
Vol 87 ◽  
pp. 1-11 ◽  
Author(s):  
F. Djamaluddin ◽  
S. Abdullah ◽  
A.K. Ariffin ◽  
Z.M. Nopiah
Keyword(s):  
Impact Loading ◽  
Oblique Impact ◽  
Loading Conditions ◽  
Circular Tubes ◽  
Foam Filled

Finite Element Modelling of Polymeric Foam-Filled Aluminium 2024-T4 Alloy Tube under Dynamic Axial Loading

2013 ◽  
Vol 315 ◽  
pp. 45-50 ◽  
Author(s):  
Azrol Jailani ◽  
Akhbar Othman ◽  
Siti Mariam Tajuddin
Keyword(s):  
Finite Element ◽  
Axial Loading ◽  
Displacement Curve ◽  
Element Analysis ◽  
Polymeric Foam ◽  
Deformation And Failure ◽  
Closed Cell ◽  
Cylindrical Tubes ◽  
Foam Filled ◽  
Collapse Behavior

The paper presents the numerical studies of two different tubes under axial impact loading structures. The cylindrical tubes filled with closed-cell polymeric foam. The deformation and failure mechanism of this new structure were observed and analyzed numerically using the finite element method. It is revealed that the stress distribution and fracture of the foam-filled tube structure are different from those of foam-filled tube. In comparison with double cell foam-filled tubes, the load-carrying capacity of this new structure is much steadier, the collapse behavior resistance is enhanced, and the weight efficiency of energy absorption is higher. Parameters affecting the performance of the foam-filled tube structures are also studied. Comparison were carried out with load versus displacement curve and also dynamic mean load as well as dynamic absorbed energy versus deformation of tubular collapse modeling failure mode using finite element analysis.

Collapse behavior of thin-walled corrugated tapered tubes under oblique impact

2018 ◽  
Vol 122 ◽  
pp. 510-528 ◽  
Author(s):  
Sami E. Alkhatib ◽  
Faris Tarlochan ◽  
Ahmed Hashem ◽  
Sadok Sassi
Keyword(s):  
Oblique Impact ◽  
Thin Walled ◽  
Collapse Behavior

Energy absorption of thin-walled circular tubes with gradient thickness under oblique loads

2020 ◽  
Vol 234 (16) ◽  
pp. 3207-3220 ◽  
Author(s):  
Peng Wang ◽  
Yuan Zhang ◽  
Fan Yang ◽  
Kun Tian ◽  
Qi Zhao ◽  
...  
Keyword(s):  
Finite Element ◽  
Energy Absorption ◽  
Loading Condition ◽  
Axial Loading ◽  
Deformation Mode ◽  
Circular Tubes ◽  
Oblique Loading ◽  
Nonuniform Thickness ◽  
Absorption Performance ◽  
Thin Walled

Introducing nonuniform thickness has shown promising potential in enhancing the energy absorption of thin-walled tubes. However, existing studies were focused on the axial loading, with little attention being paid to the oblique loading condition. In this paper, the energy absorption performance and the deformation modes of the circular tubes with gradient thicknesses under oblique loads are investigated. Finite element simulations and experiments were carried out for both uniform-thick and gradient-thick tubes under the axial and oblique loads, and satisfactory agreement was achieved betweent the numerical and the experimental results. The validated finite element models were used to investigate the effects of the thickness gradient and loading angle on the deforamtion modes and the energy absorption. The results highlight the advantages of the gradient-thickness tubes in improving the energy absorption performance under the oblique loading condition, especially at a larger loading angle. A novel progressive bending deformation mode was observed for the tube with large thickness gradient at a loading angle larger than 15°, which is beneficial for the energy absorption performance.

Crush Response of Polyurethane Foam-Filled Aluminium Tube Subjected to Axial Loading

2014 ◽  
Vol 875-877 ◽  
pp. 534-541 ◽  
Author(s):  
Chawalit Thinvongpituk ◽  
Nirut Onsalung
Keyword(s):  
Energy Absorption ◽  
Polyurethane Foam ◽  
Testing Machine ◽  
Axial Loading ◽  
Asymmetric Mode ◽  
Pu Foam ◽  
Universal Testing ◽  
Collapse Mode ◽  
Empty Tube ◽  
Foam Filled

In this paper, the experimental investigation of polyurethane (PU) foam-filled into circular aluminum tubes subjected to axial crushing was presented. The purpose of this study is to improve the energy absorption of aluminium tube under axial quasi-static load. The aluminium tube was made from the AA6063-T5 aluminium alloy tubes. Each tube was filled with polyurethane foam. The density of foam was varied from 100, 150 and 200 kg/mP3P including with empty tube. The range of diameter/thickness (D/t) ratio of tube was varied from 15-55. The specimen were tested by quasi-static axial load with crush speed of 50 mm/min using the 2,000 kN universal testing machine. The load-displacement curves while testing were recorded for calculation. The mode of collapse of each specimen was analyzed concerning on foam density and the influence of D/t ratio. The results revealed that the tube with foam-filled provided significantly increment of the energy absorption than that of the empty tube. While the density of foam and D/t ratios increase, the tendency of collapse mode is transformed from asymmetric mode to concertina mode.

Study on Multi-Axial Mechanical Properties of a Polyurethane Foam and Experimental Verification

2011 ◽  
Vol 311-313 ◽  
pp. 301-308
Author(s):  
Shou Hong Han ◽  
Zhen Hua Lu ◽  
Yong Jin Liu
Keyword(s):  
Mechanical Properties ◽  
Constitutive Model ◽  
Polyurethane Foam ◽  
Axial Compression ◽  
Axial Loading ◽  
Hydrostatic Compression ◽  
Model Parameters ◽  
Loading Conditions ◽  
Three Point Bending ◽  
Pu Foam

In order to investigate the multi-axial mechanical properties of a kind of PU (polyurethane) foam, some experiments in different loading conditions including uni-axial tension, uni-axial compression, hydrostatic compression and three-point bending were conducted. It is shown that the hydrostatic component influences yield behavior of PU foam, the yield strength and degree of strain hardening in hydrostatic compression exceed those for uni-axial compression. In terms of the differential hardening constitutive model, the evolution of PU foam yield surface and plastic hardening laws were fitted from experimental data. A finite element method was applied to analyze the quasi-static responses of the PU foam sandwich beam subjected to three-point bending, and good agreement was observed between experimental load-displacement responses and computational predictions, which validated the multi-axial loading methods and stress-strain constitutive model parameters. Moreover, effects of two foam models applied to uni-axial loading and multi-axial loading conditions were analyzed and compared with three-point bending tests and simulations. It is found that the multi-axial constitutive model can bring more accurate prediction whose parameters are obtained from the tests above mentioned.

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