Modeling and optimization of foam-filled thin-walled columns for crashworthiness designs

2010 ◽  
Vol 46 (9) ◽  
pp. 698-709 ◽  
Author(s):  
Jing Bi ◽  
Hongbing Fang ◽  
Qian Wang ◽  
Xuchun Ren
Keyword(s):  
Modeling And Optimization ◽  
Foam Filled ◽  
Thin Walled

scholarly journals Study on the Composite Structure of Aluminum Foam-Filled Thin-Walled Metal Tube to Reduce the Charge Overload inside the Projectile during the Penetration Process

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Fudi Liang ◽  
Zengyou Liang ◽  
Dezhi Deng
Keyword(s):  
Reinforced Concrete ◽  
Stress Analysis ◽  
Composite Structure ◽  
High Speed ◽  
Aluminum Foam ◽  
Metal Tube ◽  
Penetration Process ◽  
Mathematical Expressions ◽  
Foam Filled ◽  
Thin Walled

When a projectile penetrates a target at high speed, the charge loaded inside the projectile usually bears a high overload, which will consequently severely affect its performance. In order to reduce the overload of the charge during the penetration process, the structure of the projectile was improved by adding two buffers at both ends of the charge. In this study, the mathematical expressions were first gained about the axial buffering force generated by the thin-walled metal tube, aluminum foam, and the composite structure of aluminum foam-filled thin-walled metal tube when they were impacted by the high-speed mass block through reasonable assumptions and stress analysis. During the experiment on the high-speed projectile penetrating reinforced concrete target, the acceleration curve of the charge and the projectile body were obtained. The results show that the maximum overload that the charge was subjected to during the launch and penetration process was significantly reduced, and the change in overload, which the charge was subjected to during the penetration process, was also less obvious.

scholarly journals Energy Absorption of Aluminium Extrusions Filled with Cellular Materials Under Axial Crushing: Study of the Interaction Effect

2020 ◽  
Vol 10 (23) ◽  
pp. 8510
Author(s):  
Javier Paz ◽  
Miguel Costas ◽  
Jordi Delgado ◽  
Luis Romera ◽  
Jacobo Díaz
Keyword(s):  
Energy Dissipation ◽  
Cross Sections ◽  
Interaction Effect ◽  
Unit Volume ◽  
Variable Cross Section ◽  
Variable Cross ◽  
Polymeric Foam ◽  
Axial Crushing ◽  
Foam Filled ◽  
Thin Walled

This investigation focuses on the interaction effect during the quasi-static axial crushing of circular and square thin-walled aluminium extrusions filled with polymeric foam or cork. The increment in the absorbed energy due to interactions between materials was assessed using a validated numerical model calibrated with experimental material data. Simulations were run with variable cross-section dimensions, thickness, and foam density. The results were used to adjust the parameters of design formulas to predict the average crush forces of foam- and cork-filled thin-walled tubes. The analysis of the energy dissipation per unit volume revealed that the highest increments due to the interaction between materials appeared in the foam-filled square extrusions. Energy dissipation increased with higher density foams for both cross-sections due to a stronger constraint of the aluminium walls, and thus a reduction of the folding length. Thinner tube walls also delivered a higher improvement in the energy dissipation per unit volume than those with thicker walls. The contribution of friction was also quantified and investigated.

Postbuckling behaviour of foam-filled, thin-walled steel beams

1991 ◽  
Vol 20 (1) ◽  
pp. 75-83 ◽  
Author(s):  
J.Michael Davies ◽  
Raheef Hakmi
Keyword(s):  
Steel Beams ◽  
Foam Filled ◽  
Thin Walled

scholarly journals Energy Absorbing Effectiveness – Different Approaches

2018 ◽  
Vol 12 (1) ◽  
pp. 54-59 ◽  
Author(s):  
Maria Kotełko ◽  
Mirosław Ferdynus ◽  
Jacek Jankowski
Keyword(s):  
Impact Load ◽  
Geometrical Parameters ◽  
Foam Filled ◽  
Thin Walled ◽  
Energy Absorbers ◽  
Energy Absorbing ◽  
Selection Of

AbstractIn the paper the study of different crashworthiness indicators used to evaluate energy absorbing effectiveness of thin-walled energy absorbers is presented. Several different indicators are used to assess an effectiveness of two types of absorbing structures, namely thin-walled prismatic column with flaws and thin-walled prismatic frustum (hollow or foam filled) in both cases subjected to axial compressive impact load. The indicators are calculated for different materials and different geometrical parameters. The problem of selection of the most appropriate and general indicators is discussed.

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