Fatigue Testing of High Performance Flexible Polyurethane Foam

Hager, S.L.; Craig, T.A.

doi:10.1177/0021955x9202800305

Cited by 14 publications

(7 citation statements)

References 1 publication

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“…In fact, the presence of CNF facilitates the achievement of higher loads at the same displacement (−5 mm) and, therefore, an increase of Young's modulus. The trend described above regarding the fatigue behavior of polyurethane foams agrees with some results reported in literature [43,44].…”

Section: Fatigue Testssupporting

confidence: 92%

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Polyurethane Foams Loaded with Carbon Nanofibers for Oil Spill Recovery: Mechanical Properties under Fatigue Conditions and Selective Absorption in Oil/Water Mixtures

et al. 2021

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Marine pollution due to spillage of hydrocarbons represents a well-known current environmental problem. In order to recover the otherwise wasted oils and to prevent pollution damage, polyurethane foams are considered suitable materials for their ability to separate oils from sea-water and for their reusability. In this work we studied polyurethane foams filled with carbon nanofibers, in varying amounts, aimed at enhancing the selectivity of the material towards the oils and at improving the mechanical durability of the foam. Polyurethane-based foams were experimentally characterized by morphological, surface, and mechanical analyses (optical microscopy observation, contact angle measurement, absorption test according to ASTM F726-99 standard and compression fatigue tests according to ISO 24999 standard). Results indicated an increase in hydrophobic behavior and a good oleophilic character of the composite sponges besides an improved selective absorption of the foam toward oils in mixed water/oil media. The optimal filler amount was found to be around 1 wt% for the homogeneous distribution inside the polymeric foam. Finally, the fatigue test results showed an improvement of the mechanical properties of the foam with the growing carbon filler amount.

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Section: Fatigue Testssupporting

confidence: 92%

“…Baig et al [ 37 ] tested the absorption of their prepared material using a dynamic system. Mechanical fatigue properties of polyurethane foams have been well known for more than 30 years [ 43 , 44 ]. However, in the field of oil recovery, the literature is lacking on dynamic evaluations [ 45 ].…”

Section: Introductionmentioning

confidence: 99%

Polyurethane Foams Loaded with Carbon Nanofibers for Oil Spill Recovery: Mechanical Properties under Fatigue Conditions and Selective Absorption in Oil/Water Mixtures

et al. 2021

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“…The elasticity of high resilience foam helps to prolong the comfort life of hospitality furniture, sofa and mattresses. [38][39][40][41][42][43][48][49][50] Due to higher density and by using highly expensive HR chemicals, high-resilience foam tends to be more expensive compared to standard foam or other cushioning materials. [41][42][43]51 All the mechanical testing of flexible polyurethane foams were examined by ASTM standards.…”

Section: Introductionmentioning

confidence: 99%

Impact of ambient and vacuum pressure on the physico mechanical properties of flexible polyurethane foam reinforced withCaCO₃

Singh,

Gopalasamudram,

Maitra

2024

Polymers for Advanced Techs

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This study investigates the effects of variable pressure conditions (550 and 1013 mbar) on the physico‐mechanical and structural properties of flexible polyurethane foam, incorporating different compositions of calcium carbonate (CaCO3) filler. The objective is to achieve sustained mechanical and structural properties of flexible polyurethane foam while reducing costs through variable pressure foaming technology. With CaCO3 filler concentrations ranging from 20 to 100 parts per hundred (pphp) of polyol, it was found that foam produced at low pressure (550 mbar) demonstrated improved resilience and durability, particularly with CaCO3 compositions up to 100 pphp. Conversely, foam produced at standard atmospheric pressure (1013 mbar) using compositions up to 100 pphp did not exhibit significant enhancements in physico‐mechanical properties. The study employs various characterization techniques, including mechanical testing, scanning electron microscopy, differential scanning calorimetry, thermal gravimetric analysis, and Fourier transform infrared spectroscopic analysis, to assess the flexible polyurethane foam. It provides a detailed examination of the effects of variable pressure on cellular structure, cell size, filler distributions, mechanical properties, and thermal stability of flexible polyurethane foam using CaCO3 filler.

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“…Viscoelastic material have significantly different linear elasticity response [9] and they show characteristics of a vibrational damper [10,11]. Under constant compressive strain the force in the foam decreases by passing time (relaxation) [12]. In addition, over time the strain increases (creeps) if the foam is loaded with a given mass [13].…”

Section: Introductionmentioning

confidence: 99%

Analyzing free and forced vibration of flexible polyurethane foam using multiple time scales method

Zanoosi

Haghpanahi

Kalantarinejad³

2016

J Braz. Soc. Mech. Sci. Eng.

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List of symbols k 1 Coefficient of linear stiffness [N/m] k 3 Coefficient of cubic stiffness [N/m 3 ] k 5 Coefficient of fifth power stiffness [N/m 5 ] c Coefficient of linear velocity damping [Ns/m] α i Kernel coefficient of viscoelastic relaxation [1/s] a i Kernel coefficient of viscoelastic relaxation [1/s] z Foam compression [m] Γ Kernel of viscoelastic relaxation x Relative displacement of the mass [m] σ Detuning parameter

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Fatigue Testing of High Performance Flexible Polyurethane Foam

Cited by 14 publications

References 1 publication

Polyurethane Foams Loaded with Carbon Nanofibers for Oil Spill Recovery: Mechanical Properties under Fatigue Conditions and Selective Absorption in Oil/Water Mixtures

Polyurethane Foams Loaded with Carbon Nanofibers for Oil Spill Recovery: Mechanical Properties under Fatigue Conditions and Selective Absorption in Oil/Water Mixtures

Impact of ambient and vacuum pressure on the physico mechanical properties of flexible polyurethane foam reinforced withCaCO₃

Analyzing free and forced vibration of flexible polyurethane foam using multiple time scales method

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Fatigue Testing of High Performance Flexible Polyurethane Foam

Cited by 14 publications

References 1 publication

Polyurethane Foams Loaded with Carbon Nanofibers for Oil Spill Recovery: Mechanical Properties under Fatigue Conditions and Selective Absorption in Oil/Water Mixtures

Polyurethane Foams Loaded with Carbon Nanofibers for Oil Spill Recovery: Mechanical Properties under Fatigue Conditions and Selective Absorption in Oil/Water Mixtures

Impact of ambient and vacuum pressure on the physico mechanical properties of flexible polyurethane foam reinforced withCaCO3

Analyzing free and forced vibration of flexible polyurethane foam using multiple time scales method

Contact Info

Product

Resources

About

Impact of ambient and vacuum pressure on the physico mechanical properties of flexible polyurethane foam reinforced withCaCO₃