Comparative analysis of the mechanical behavior and plastic deformation of empty and polyurethane foam-filled polyethylene tubes under lateral compression
Seyedahmad Taghizadeh, Abbas Niknejad, Lorenzo Maccioni, Franco Concli
TL;DR
This study compares how empty and foam-filled polyethylene tubes behave under compression, showing that foam-filled tubes absorb more energy and perform better structurally.
Contribution
The novel contribution is the systematic evaluation of foam-filled polyethylene tubes under lateral compression, highlighting the benefits of foam density and adhesion on performance.
Findings
Foam-filled tubes outperformed empty tubes in energy absorption and load-bearing capacity.
Larger diameters in foam-filled tubes increased flattening load and total absorbed energy.
Higher-density polyurethane foam and strong foam-tube adhesion improved peak load capacity.
Abstract
In this research, the energy absorption and plastic deformation of circular polyethylene tubes under lateral compression were investigated, comparing empty tubes with those filled with polyurethane foam. The effects of tube length, diameter, wall thickness, and filler density on load-bearing capacity and energy absorption were evaluated. Absorbed energy and lateral load were found to increase with tube length, although the ductile response of polyethylene produced pronounced fluctuations in the load–displacement curve. Diameter influenced the two configurations differently: in empty tubes, smaller diameters yielded greater energy absorption, whereas in foam-filled tubes, larger diameters increased the flattening load and total absorbed energy, underscoring the critical role of diameter in foam-filled systems. Increasing wall thickness enhanced energy absorption, but polyurethane-foam…
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Taxonomy
TopicsCellular and Composite Structures · Polymer composites and self-healing · Structural Integrity and Reliability Analysis