Crashworthiness optimization of foam-filled tapered thin-walled structure using multiple surrogate models

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.

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Multiobjective crashworthiness optimization of multi-cornered thin-walled sheet metal members

Thin-Walled Structures ◽

10.1016/j.tws.2014.12.009 ◽

2015 ◽

Vol 89 ◽

pp. 31-41 ◽

Cited By ~ 45

Author(s):

Milad Abbasi ◽

Sekhar Reddy ◽

Ali Ghafari-Nazari ◽

Mohammad Fard

Keyword(s):

Sheet Metal ◽

Crashworthiness Optimization ◽

Thin Walled

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Multiobjective crashworthiness optimization of thin-walled structures with functionally graded strength under oblique impact loading

Thin-Walled Structures ◽

10.1016/j.tws.2017.04.007 ◽

2017 ◽

Vol 117 ◽

pp. 165-177 ◽

Cited By ~ 21

Author(s):

Liang Ying ◽

Minghua Dai ◽

Sizhu Zhang ◽

Haolin Ma ◽

Ping Hu

Keyword(s):

Impact Loading ◽

Oblique Impact ◽

Functionally Graded ◽

Crashworthiness Optimization ◽

Thin Walled Structures ◽

Thin Walled

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

Finite Elements in Analysis and Design ◽

10.1016/j.finel.2010.03.008 ◽

2010 ◽

Vol 46 (9) ◽

pp. 698-709 ◽

Cited By ~ 71

Author(s):

Jing Bi ◽

Hongbing Fang ◽

Qian Wang ◽

Xuchun Ren

Keyword(s):

Modeling And Optimization ◽

Foam Filled ◽

Thin Walled

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

Applied Sciences ◽

10.3390/app10238510 ◽

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.

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