A functionally graded syntactic foam material for high energy absorption under compression

2007 ◽  
Vol 61 (4-5) ◽  
pp. 979-982 ◽  
Author(s):  
Nikhil Gupta
Keyword(s):  
Energy Absorption ◽  
Syntactic Foam ◽  
High Energy ◽  
Functionally Graded ◽  
Foam Material ◽  
High Energy Absorption

Ultra-high energy absorption high-entropy alloy syntactic foam

2021 ◽  
Vol 207 ◽  
pp. 108563
Author(s):  
Jin Meng ◽  
Tian-Wei Liu ◽  
Hai-Ying Wang ◽  
Lan-Hong Dai
Keyword(s):  
Energy Absorption ◽  
Syntactic Foam ◽  
High Energy ◽  
High Entropy Alloy ◽  
Ultra High Energy ◽  
High Entropy ◽  
High Energy Absorption

Composite Core Cross Tube Crushing Analysis

2020 ◽  
Author(s):  
Sean Jenson ◽  
Muhammad Ali ◽  
Khairul Alam
Keyword(s):  
Energy Absorption ◽  
Compressive Loading ◽  
Deformation Mode ◽  
High Energy ◽  
Absorption Capacity ◽  
Functionally Graded ◽  
Layer By Layer ◽  
Thin Walled ◽  
The Cross ◽  
Energy Absorbing

Abstract Thin walled axial members are typically used in automobiles’ side and front chassis to improve crashworthiness of vehicles. Extensive work has been done in exploring energy absorbing characteristics of thin walled structural members under axial compressive loading. The present study is a continuation of the work presented earlier on evaluating the effects of inclusion of functionally graded cellular structures in thin walled members under axial compressive loading. A compact functionally graded composite cellular core was introduced inside a cross tube with side length and wall thickness of 25.4 mm and 3.048 mm, respectively. The parameters governing the energy absorbing characteristics such as deformation or collapsing modes, crushing/ reactive force, plateau stress level, and energy curves, were evaluated. The results showed that the inclusion of composite graded cellular structure increased the energy absorption capacity of the cross tube significantly. The composite graded structure underwent progressive stepwise, layer by layer, crushing mode and provided lateral stability to the cross tube thus delaying local tube wall collapse and promoting large localized folds on the tube’s periphery as compared to highly localized and compact deformation modes that were observed in the empty cross tube under axial compressive loading. The variation in deformation mode resulted in enhanced stiffness of the composite structure, and therefore, high energy absorption by the structure. This aspect has a potential to be exploited to improve the crashworthiness of automobile structures.

scholarly journals Comparative study on destructive performance and energy absorption of aluminum tube by simulation and experiment

2020 ◽  
Vol 12 (5) ◽  
pp. 168781402092413
Author(s):  
Lai Hu ◽  
Jun Zha ◽  
Yaolong Chen
Keyword(s):  
Comparative Study ◽  
Energy Absorption ◽  
Simulation Analysis ◽  
High Energy ◽  
Low Energy ◽  
Tube Length ◽  
Thin Wall ◽  
Span Length ◽  
Aluminum Tube ◽  
High Energy Absorption

This study conducted an investigation on transverse quasi-static three-point loading on a circular aluminum tube and its characteristic plastic failure and energy-absorption behaviors. The thin wall thickness of the aluminum tube, the various diameter and thickness ratios ( D/ t) of the tube, and the tube length are important control parameters. Experimental data for different span length and thickness ratios of the tube were characterized and correlated to its plastic collapse behavior. A simulation model by computational analysis using ANSYS was also conducted as a comparative study. The results of the study found that transverse three-point bend loading (ASTM F290) of a circular aluminum tube underwent different stages of deformation, from initial pure crumpling to crumpling and bending, and finally, structural rupture. The results of master curve analysis found that regions of high energy absorption and low energy absorption can be classified with respect to the characteristic tubular deformation. High energy absorption deformation is correlated with a short span length and higher D/ t ratio, and vice versa for low energy absorption deformation of the circular aluminum tube. Simulation analysis also predicted similar characteristic trends of deformation behavior in the experiment, with a less than 3% average coefficient of variation.

Design of Fiber-Reinforced Composite Tubes as Energy Absorption Element

2009 ◽  
Author(s):  
Y. Yang ◽  
S. Terada ◽  
M. Okano ◽  
A. Nakai ◽  
H. Hamada
Keyword(s):  
Energy Absorption ◽  
High Energy ◽  
Fiber Reinforced ◽  
Inertia Moment ◽  
Reinforced Composite ◽  
Bending Behavior ◽  
High Energy Absorption ◽  
Energy Absorbing ◽  
Frp Tubes ◽  
Two Sides

As an energy absorption member, fiber-reinforced composites (FRPs) are more favorable because they are light in weight and possess better energy absorption capabilities as compared to their metal counterparts. However, the energy absorbing mechanisms of FRP are complicated owning to the multi-micro fractures. Therefore, in this study, the designs of FRP tubes were carried out with considerations directed at the energy absorbing mechanisms. Two methods based on the design of the energy absorbed by bending of the fronds (Ubend) and the energy absorbed by fiber fractures (Uff) are concentrated. Here the bending behavior of frond can be considered as the bending beam by an external force. And it is found that Ubend is affected directly by the inertia moment I, which is affect by the geometry. Therefore, FRP tubes were fabricated to have a geometry combined with a bigger I. Additional, in order to get more fiber fractures to get an increased Uff, the design of bending stress, σ, was carried out. FRP tubes bending towards one side only rather than two sides are proposed to get bending fronds with a double thicker thickness, which in turn led to high stresses, many fiber fractures and high energy absorption.

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