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Zhang, S. W.; He, Ren; Wang, Deguo; Fan, Qingyu

doi:10.1023/a:1011814506377

Cited by 20 publications

(6 citation statements)

References 4 publications

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“…This research predicted that the erosion rate of TPUs is lower at 23°C than at -20°C. This difference in erosion resistance was attributed to the decrease in temperature, increasing Young's Modulus and decreasing yield strain and stress [5], [8]. This was further substantiated by previous work that had found erosion rate increases as the temperature difference between the testing temperature and the glass transition temperature reduces [16].…”

Section: Introductionsupporting

confidence: 55%

“…Details of study Year [5] 63 ̶̶ ̶̶ 67°C Experimental, liquid medium 2001 [6] -20 °C, 23°C, 60°C, 100°C Theoretical 2013 [8] Not specified Experimental 1990 [10] Room temperature implied Experimental 1990 [12] -100 ̶̶ ̶̶ 150°C Theoretical 2014 [14] 25°C, 60°C, 100°C Experimental 2016 [15] 22°C, 60°C, 100°C Theoretical 2017…”

Section: Reference Temperature Studiedmentioning

confidence: 99%

“…TPUs have recently gained interest as a material suitable for erosion-resistant coatings [5][6][7][8][9][10][11][12]. TPUs are classified as ductile elastomers with numerous advantages over many alternative erosion-resistant coatings; they have good corrosion resistance, good adhesion to the substrate and are lighter than their metallic or ceramic counterparts [11].…”

Section: Introductionmentioning

confidence: 99%

“…Table 1: Previous studies into the wear of polyurethane S.W. Zhang et al (2001) [5] studied the abrasive erosion of PU in liquid mediums, a low impingement velocity (9.1 m/s), a particle size of 300-450 µm and a relatively high temperature (63-67°C). They found the erosion mechanism was a combination of microcutting, plastic fracture and corrosion and the elevated temperature caused chemical changes, such as thermal degradation of the allophanate and biuret groups, hydrolysis and surface oxidative degradation.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

The effect of temperature on the erosion of polyurethane coatings for wind turbine leading edge protection

Godfrey

Siederer

Zekonyte

et al. 2021

Wear

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Section: Introductionsupporting

confidence: 55%

Section: Reference Temperature Studiedmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The effect of temperature on the erosion of polyurethane coatings for wind turbine leading edge protection

Godfrey

Siederer

Zekonyte

et al. 2021

Wear

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“…Polyurethane film has a unique micro-phase separation structure containing soft blocks with polymer chain mobility and partially crystalline hard blocks and is, therefore, widely used on the surface of rotor blade composite materials as an anti-sand erosion coating with good impact absorption capacity [6,[8][9][10]. The sand erosion resistance of polyurethane film was closely related to the hybrid ratio of the soft and hard segments and the service conditions.…”

Section: Introductionmentioning

confidence: 99%

Sand Erosion Resistance and Failure Mechanism of Polyurethane Film on Helicopter Rotor Blades

Zheng,

Fan,

Gong

et al. 2023

Polymers

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Polyurethane is widely used on the surface of composite materials for rotor blades as sand erosion protection materials. The failure mechanism investigation of polyurethane film under service conditions is useful for developing the optimal polyurethane film for rotor blades. In this article, the sand erosion test parameters were ascertained according to the service environment of the polyurethane film. The sand erosion resistance and failure mechanism of polyurethane film at different impact angles were analyzed by an infrared thermometer, a Fourier transform infrared spectrometer (FTIR), a differential scanning calorimeter (DSC), a field emission scanning electron microscope (FESEM), and a laser confocal microscope (CLSM). The results show that the direct measurement method of volume loss can better characterize the sand erosion resistance of the polyurethane film compared to traditional mass loss methods, which avoids the influence of sand particles embedded in the polyurethane film. The sand erosion resistance of polyurethane film at low-angle impact is much lower than that at high-angle impact. At an impact rate of 220 m/s, the volume loss after sand erosion for 15 min at the impact angle of 30° is 57.8 mm3, while that at the impact angle of 90° is only 2.6 mm3. The volume loss prediction equation was established according to the experimental data. During low-angle erosion, the polyurethane film damage is mainly caused by sand cutting, which leads to wrinkling and accumulation of surface materials, a rapid increase in roughness, and the generation of long cracks. The linking of developing cracks would lead to large-scale shedding of polyurethane film. During high-angle erosion, the polyurethane film damage is mainly caused by impact. The connection of small cracks caused by impact leads to the shedding of small pieces of polyurethane, while the change in the roughness of the film is not as significant as that during low-angle erosion. The disordered arrangement of the soft and hard blocks becomes locally ordered under the action of impact and cutting loads. Then, the disordered state is restored after the erosion test finishes. The erosion of sand particles leads to an increase in the temperature of the erosion zone of the polyurethane film, and the maximum temperature rise is 6 °C, which does not result in a significant change in the molecular structure of the polyurethane film. The erosion failure mechanism is cracking caused by sand cutting and impact.

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