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Volume 10
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Article

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

by
Javier Paz
1,*,
Miguel Costas
2,
Jordi Delgado
3,
Luis Romera
1 and
Jacobo Díaz
1
1
Structural Mechanics Group, School of Civil Engineering, Universidade da Coruña, Campus de Elviña, 15071 A Coruña, Spain
2
Structural Impact Laboratory (SIMLab) and Centre for Advanced Structural Analysis (CASA), Department of Structural Engineering, Norwegian University of Science and Technology (NTNU), 7491 Trondheim, Norway
3
School of Civil Engineering, Universidade da Coruña, Campus de Elviña, 15071 A Coruña, Spain
*
Author to whom correspondence should be addressed.
Appl. Sci. 2020, 10(23), 8510; https://doi.org/10.3390/app10238510
Submission received: 8 November 2020 / Revised: 24 November 2020 / Accepted: 25 November 2020 / Published: 28 November 2020
(This article belongs to the Special Issue Armour and Protection Systems)
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Abstract

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.
Keywords: cork; polymeric foam; aluminium; axial crushing; interaction cork; polymeric foam; aluminium; axial crushing; interaction

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MDPI and ACS Style

Paz, J.; Costas, M.; Delgado, J.; Romera, L.; Díaz, J. Energy Absorption of Aluminium Extrusions Filled with Cellular Materials Under Axial Crushing: Study of the Interaction Effect. Appl. Sci. 2020, 10, 8510. https://doi.org/10.3390/app10238510

AMA Style

Paz J, Costas M, Delgado J, Romera L, Díaz J. Energy Absorption of Aluminium Extrusions Filled with Cellular Materials Under Axial Crushing: Study of the Interaction Effect. Applied Sciences. 2020; 10(23):8510. https://doi.org/10.3390/app10238510

Chicago/Turabian Style

Paz, Javier, Miguel Costas, Jordi Delgado, Luis Romera, and Jacobo Díaz. 2020. "Energy Absorption of Aluminium Extrusions Filled with Cellular Materials Under Axial Crushing: Study of the Interaction Effect" Applied Sciences 10, no. 23: 8510. https://doi.org/10.3390/app10238510

APA Style

Paz, J., Costas, M., Delgado, J., Romera, L., & Díaz, J. (2020). Energy Absorption of Aluminium Extrusions Filled with Cellular Materials Under Axial Crushing: Study of the Interaction Effect. Applied Sciences, 10(23), 8510. https://doi.org/10.3390/app10238510

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