Lateral Crushing of Square Aluminium Tubes Filled with Different Cores

Hussein, Rafea Dakhil; Naeem, Haider T.; Atiyah, Hasanain; Ruan, Dong

doi:10.1590/1980-5373-mr-2022-0057

Cited by 4 publications

(1 citation statement)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Since 2014, Brazil has produced more than 1 million m 3 of new polyurethane foam per day, which increases the need for studies on its recycling and reuse after its commercial life 7 . Although research on alternative applicability for new polyurethane is common 8,9 , there are still few viable proposals for using post-consumer foam. The use of post-consumer polyurethane foams as sorbents has not been reported so far.…”

Section: Introductionmentioning

confidence: 99%

Post-Consumer Polyurethane Foams Hydrophobization Through Surface Modifications for Oil Spill Sorption

2023

View full text Add to dashboard Cite

To increase oil sorption, polyurethane foams were modified with MoS 2 , ZnO grafting and/or hexadecanoic acid coating. The foams were characterized by Scanning Electron Microscopy + Energy Dispersive X-ray Spectroscopy and Contact Angle techniques. Three sorption tests were performed.In tests with 100% water, the ZnO-PC modification showed a reduction of 35.7% in the seawater sorption when compared to Un-PC. In tests with 100% oil, there was a 29-fold increase in sorption (more than 2803%) of S46 lubricant oil when Un-PC performance was compared with ZnO-PC.In tests on the multicomponent systems, the lowest seawater sorption was 0.01 ± 0.00 g.g -1 (HA-PC), 0.08 ± 0.01 g.g -1 (Un-PC), and 1.39 ± 0.02 g.g -1 (Un-PC) for 20W40 engine oil, S46 lubricating oil, and diesel, respectively. The highest oil sorption in the systems was 41.34 ± 1.02 g.g -1 (HA-PC), 32.81 ± 0.31 g.g -1 (MoS 2 -PC), and 14.78 ± 0.27 g.g -1 (ZnO-PC) for diesel, S46 lubricating oil, and 20W40 engine oil, respectively. The reuse tests indicated that even after 10 cycles, the ZnO-PC foam kept its sorption capacity unchanged. Post-consumer foams proved to be effective in the sorption of different oils spilled into seawater, especially those grafted with ZnO rods or impregnated with MoS 2 .

show abstract

Section: Introductionmentioning

confidence: 99%

Post-Consumer Polyurethane Foams Hydrophobization Through Surface Modifications for Oil Spill Sorption

2023

View full text Add to dashboard Cite

show abstract

Lateral compression behavior of expanded polypropylene foam-filled carbon fiber reinforced polymer and aluminum/carbon fiber reinforced polymer composite tubes: An experimental study

Yalçın,

İskender Özsoy

2023

Journal of Reinforced Plastics and Composites

View full text Add to dashboard Cite

This study investigates the energy-absorbing capability of the circular cross-section carbon fiber reinforced polymer (CFRP) and Aluminum/CFRP (Al/CFRP) composite tubular structures under quasi-static lateral compression. The CFRP composite tubes were manufactured with the 6, 8, and 10 layers to observe the thickness effect. A specially designed and manufactured polymer mold was used to manufacture identical CFRP composite tubes. Expanded polypropylene (EPP) foam with densities of 30 kg/m3, 60 kg/m3, and 75 kg/m3 was chosen as a filler material to enhance the energy absorption and efficiency because of its superior properties of high strength-to-weight ratio. The experiments revealed that the carbon fiber layer number directly affected CFRP and Al/CFRP composite tubes' force and the absorbed energy values. The increase in the maximum and average force values is more evident than in the Al/CFRP tubes due to using aluminum tubes constraining the effect of the carbon woven part. Additionally, EPP foam filling significantly contributes to the tubes' absorbed energy. The absorbed energy increased proportional to the foam density, and the 10-layer Al/CFRP tube filled with 75 kg/m3 sample absorbed the highest energy value as 257 J. However, considering the crashworthiness parameters (i.e., specific energy absorption, crush force efficiency, and work effectiveness), the best sample combination did not absorb the highest energy. Although the 6-layer CFRP composite tube absorbed the lowest energy, it has higher specific energy absorption and work effectiveness. According to the crashworthiness parameters, the best efficiency was obtained in the 10-layer composite tubes filled with 75 kg/m3.

show abstract

Introduction of a Novel Sunflower-Inspired Honeycomb Structure with Enhanced Energy Absorption Capacity under In-Plane Loading

Sarkhosh

2024

Preprint

View full text Add to dashboard Cite

This study introduces a novel sunflower-inspired gradient structure where the size of hexagonal cells changes with a specific gradient in the radial direction. Subsequently, the crashworthiness and deformation performance of this structure were compared and analyzed with conventional honeycomb structures in both hollow and PU foam-filled states. In this research, specimens were first fabricated using additive manufacturing with PLA + material. After injecting polyurethane foam into the void spaces between cells, the specimens were subjected to quasi-static compressive loading in the in-plane direction at a 5 mm/min rate. The results showed that the sunflower-inspired honeycomb structure has significantly better crashworthiness and specific energy absorption properties than the conventional one. Based on these findings, it is concluded that the gradient design of cell sizes in the radial direction can lead to a 35% increase in specific energy absorption and a 20% increase in mean crushing force, along with a 143% improvement in crushing force efficiency, indicating enhanced performance in protective applications. Furthermore, it was demonstrated that the presence of foam can improve the performance of honeycomb structures. According to the results, foam-filled conventional honeycomb and sunflower-inspired honeycomb structures show increases of 43% and 41% in specific energy absorption, 82% and 89% in energy absorption and mean crushing force, and 23% and 10% in crushing force efficiency, respectively. The results indicate that the gradient design of cell sizes in the radial direction and the injection of PU foam into lattice structures can serve as a reference for designing energy absorbers with high-crashworthiness properties for various industries.

show abstract

Lateral Crushing of Square Aluminium Tubes Filled with Different Cores

Cited by 4 publications

References 42 publications

Post-Consumer Polyurethane Foams Hydrophobization Through Surface Modifications for Oil Spill Sorption

Post-Consumer Polyurethane Foams Hydrophobization Through Surface Modifications for Oil Spill Sorption

Lateral compression behavior of expanded polypropylene foam-filled carbon fiber reinforced polymer and aluminum/carbon fiber reinforced polymer composite tubes: An experimental study

Introduction of a Novel Sunflower-Inspired Honeycomb Structure with Enhanced Energy Absorption Capacity under In-Plane Loading

Contact Info

Product

Resources

About