Compression properties of polymeric syntactic foam composites under cyclic loading

Yousaf, Zeshan; Smith, Margaret S.; Potluri, Prasad; Parnell, William J.

doi:10.1016/j.compositesb.2020.107764

Cited by 64 publications

(40 citation statements)

References 52 publications

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“…Compared with pure epoxy resin, the first-order and second-order loss factors increased by 41.7% and 103.3%, respectively. The first-order and second-order resonance dynamic mechanical parameters can be calculated by equations (3) to (5), as shown in Figure 11 and Table 2.…”

Section: Dynamic Mechanical Properties Of Composite Foams Under Forced Resonancementioning

confidence: 99%

“…Common matrix resins include epoxy, vinyl, polyurethane, and phenolic resins. [1][2][3][4][5][6][7][8][9] Recently, phosphates 10 and metals 11,12 have also been used as matrixes for refractory materials without using resins. Fillers in composite foams include hollow glass microspheres, polymer microspheres, carbon spheres, and large-scale glass spheres.…”

Section: Introductionmentioning

confidence: 99%

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Dynamic mechanical behaviors of epoxy resin/hollow polymeric microsphere composite foams under forced non-resonance and forced resonance

Fan

Ouyang

et al. 2021

Composites and Advanced Materials

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Composite foams with 10–50 vol% hollow polymeric microspheres were prepared using bisphenol A epoxy resin and polyetheramine curing agent as the matrix. The results demonstrated that the density, hardness, and static mechanical properties of the epoxy resin/hollow polymer microsphere composite foams, as well as their dynamic mechanical properties under forced non-resonance, were similar to those of polymer/hollow glass microsphere composite foams. At 25°C and under 1–100 Hz forced resonance, the first-order and second-order resonance frequencies of the composite foams shifted to the low-frequency region as the volume fraction of hollow polymer microspheres increased. Meanwhile, the first-order and second-order loss factors of the as-prepared composite foams were improved by 41.7% and 103.3%, respectively, compared with the pure epoxy resin. Additionally, the first-order and second-order loss factors of the as-prepared composite foams reached a maximum at 40 vol% and 30 vol% hollow polymer microspheres, respectively. This research helps us to expand the application range of composite foam materials in damping research.

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Section: Dynamic Mechanical Properties Of Composite Foams Under Forced Resonancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dynamic mechanical behaviors of epoxy resin/hollow polymeric microsphere composite foams under forced non-resonance and forced resonance

Fan

Ouyang

et al. 2021

Composites and Advanced Materials

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“…[ 31 ] Conventional elastic PU with low energy dissipation capacity displays a large recoverable deformation, which absorbs and stores external energy, releases it to kinetic energy, and can recover more than a half of the deformation under a strain. [ 32–36 ] The damping capacity can be increased from 40% to about 65% by adding CNTs, moreover, the addition of carbon nanotubes and graphene hybrid materials can increase the damping capacity to 77.9%. However, the energy dissipation is still not high.…”

Section: Introductionmentioning

confidence: 99%

Green Synthesis of Waterborne Polyurethane for High Damping Capacity

Zhang

Meng

et al. 2021

Macro Chemistry & Physics

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Damping materials have application prospects in shock absorption and noise reduction due to their ability to convert vibration into other forms of energy dissipation. Although there have been tremendous attempts to prepare materials with high damping performance, it is still a challenge to fabricate materials with excellent mechanical properties and stability while maintaining a high energy dissipation capacity. Herein, damping materials of reinforced waterborne polyurethane by adjusting the ratio of soft and hard segments is reported. As the content of hard segments increases, the content of hydrogen bonds interaction between segments increases and the phase boundaries on the microscopic morphology form which obviously enhances the damping capacity. The ultimate samples exhibit a damping capacity of more than 90% and a toughness of 14.8 MJ m–3, maintaining good toughness while exceeding the damping capacity of the most reported materials. The damping mechanisms are summarized into three aspects, the frication among soft segments, the destruction of hydrogen bonds, and the interface friction between soft and hard domains. This work paves an avenue for the application of waterborne polyurethane materials in kinetic energy buffering and impact reduction.

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“…In this regard, syntactic foams are attractive core materials that possess low density, high stiffness, and low moisture absorption 3 . Such composites are fabricated by dispersing hollow microspheres or microballoons in a polymeric matrix providing a closed‐cell porosity, thereby reducing the weight 4 . To date, several polymers, such as epoxy resins, 5–7 phenolic resins, 8 polyurethanes, 9 some thermoplastics, 10–12 and elastomers 13 have been used as matrix; however, there are still polymers to be investigated, such as is the case of polyamides.…”

Section: Introductionmentioning

confidence: 99%

Mechanical behavior of glass fiber‐reinforced Nylon‐6 syntactic foams and its Young's modulus numerical study

Yáñez‐Macías¹,

Rivera-Salinas²,

Solís-Rosales³

et al. 2021

J of Applied Polymer Sci

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Glass fiber‐reinforced Nylon‐6 syntactic foams (GRSF) were fabricated by melt mixing, adding silane‐modified hollow glass microspheres (HGMf) at 5, 10, 15, and 20 wt% and an impact modifier at 15 wt. Tensile test results showed that the foam's strength increased with the addition of HGMs but started to decrease when the volume fraction of the spheres was higher than 18 vol% (10 wt%). To elucidate the reinforcement mechanism, a numerical simulation of GRSF was carried out. It revealed that HGMs progressively become the reinforcement phase of GRSFs, as their volume fraction increased due to the load transfer occurring more readily in the HGMs than the fiber, which is expected to be the reinforcement. Hence, for a desired weight‐strength ratio, thicker walls are necessary to delay the elastic relaxation of the microspheres and the impairing of the composite as a whole in the context of strength. HGMs with relative wall thickness τ = 0.04 produce an impairing on Young's modulus, if the volume fraction of microspheres is exceeded than 18 vol% because the microspheres are not able to endure increased loads. In addition, a significant reduction of the density was observed by up to 12% in the GRSFs with 30 wt% of both fibers and HGMs. The insight gained of GRSFs role and the numerical simulation achieved through this work, is a significant step toward developing applications of these lightweight materials, since they show good combination of strength, toughness, density, and thermal insulation performance, which can be useful in the automotive, aeronautical and sports industries.

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Compression properties of polymeric syntactic foam composites under cyclic loading

Cited by 64 publications

References 52 publications

Dynamic mechanical behaviors of epoxy resin/hollow polymeric microsphere composite foams under forced non-resonance and forced resonance

Dynamic mechanical behaviors of epoxy resin/hollow polymeric microsphere composite foams under forced non-resonance and forced resonance

Green Synthesis of Waterborne Polyurethane for High Damping Capacity

Mechanical behavior of glass fiber‐reinforced Nylon‐6 syntactic foams and its Young's modulus numerical study

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