Estimating creep deformation of glass-fiber-reinforced polycarbonate

Sakai, Takenobu; Somiya, Satoshi

doi:10.1007/s11043-006-9017-y

Cited by 13 publications

(10 citation statements)

References 10 publications

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“…Effect of crystallinity on the creep behavior of PA and GFRPA Previous studies Sakai and Somiya (2006, 2009, Sakai et al (2007Sakai et al ( , 2011aSakai et al ( , 2011bSakai et al ( , 2015 and Tanks et al (2016) have detailed creep behavior as a function of time, temperature, fiber volume fraction, physical aging, and crystallinity. These reports discussed the application of the TTSP and proposed a master curve of creep compliance showing the effect of each influencing variable.…”

Section: Resultsmentioning

confidence: 99%

“…In previous studies, Sakai and Somiya (2006, 2009, Sakai et al (2007Sakai et al ( , 2011aSakai et al ( , 2011bSakai et al ( , 2015 and Tanks et al (2016) investigated the relationships between creep behavior, crystallinity, and the fiber volume fraction of a variety of polymers. The effects of these variables are described by shift factors that can be used to generate time-temperature curves at any given percent crystallinity or fiber volume fraction.…”

Section: Introductionmentioning

confidence: 99%

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Estimating the creep behavior of glass-fiber-reinforced polyamide considering the effects of crystallinity and fiber volume fraction

Sakai

Hirai

Somiya

2018

Mech Adv Mater Mod Process

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Background: The time-temperature superposition principle (TTSP) is often used to estimate the viscoelastic behavior of polymers. It can also be used to evaluate the influence of a given variable, or set of variables, on viscoelastic properties. In this research, the effects of time, temperature, fiber volume fraction and the relative crystallinity of polyamide (PA) and glass fiber-reinforced polyamide (GFRPA) were investigated using the timetemperature superposition principle to estimate viscoelastic behavior under each set of conditions. Methods: The crystallinities of PA and GFRPA, which ranged from 33 to 45%, were controlled by adjusting the duration of crystallization as 250°C. Creep tests were carried out with these materials, and creep compliance curves of each condition were obtained. Results: Using these creep compliance curves, the master curves for temperature, and the grand master curves for crystallinity and for fiber volume fraction were generated to show the relationships between fiber volume fraction, crystallinity, and viscoelastic parameters. Furthermore, the great-grand master curve for crystallinity and fiber volume fraction was generated to predict creep behavior in an arbitrarily condition. The predicted data were in good agreement with experimental results. Conclusions: A method for estimating creep deformation taking into account the effects of influencing variables was developed. The time-temperature superposition principle (TTSP) was applied to the effects of the fiber volume fraction and crystallinity. Grand master curves for crystallinity and fiber volume fraction were obtained by shifting the corresponding master curves. This study demonstrates that the creep behaviors of fiber-reinforced plastics can be estimated using these shift factors and a great-grand master curve. This method yielded estimates of creep deformation that fitted well with experimental results. Based on our findings, it should be possible to control creep deformation in plastics or fiber-reinforced resins by controlling the fiber volume fraction and the crystallinity of the matrix material.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Estimating the creep behavior of glass-fiber-reinforced polyamide considering the effects of crystallinity and fiber volume fraction

Sakai

Hirai

Somiya

2018

Mech Adv Mater Mod Process

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“…This result shows that the creep phenomenon complies with the TTSP in Arrhenius mode, as presented by Sakai and Somiya. 34…”

Section: Resultsmentioning

confidence: 99%

Time-and temperature-dependent compressive behavior of woven carbon fabric reinforced polyamide composite laminate

Nam

Goto

Tobata

et al. 2022

Journal of Composite Materials

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Plain woven carbon fabric reinforced polyamide (CF/PA) composite laminate was developed using hot-pressed processing with a vacuum-assisted system. Temperature-dependent mechanical properties of the CF/PA composite laminate under longitudinal compressive loading were examined. The compressive mechanical properties of the composite laminate decreased considerably with increasing the temperature to 120°C. The compressive strength and strain at maximal stress reduced rapidly below 80°C, while the compressive modulus declined slightly underneath 50°C. The glass transition temperature of the CF/PA composite was found to be about 50°C by the differential scanning calorimetry, which almost corresponded to the slight reduction of the elastic modulus at temperatures below 50°C. The time-dependent creep behavior of the CF/PA laminate under compressive loading at isotherms between 25°C and 50°C was studied. Creep strains of the CF/PA composite samples increased with rising temperature. The smooth creep compliance master curve of the CF/PA composite was obtained by shifting short-term creep compliance curves using the time–temperature superposition principle. The master curve provided a creep prediction to 961.6 days with the measured data in only 12.5 days.

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“…The effect of the pre-aging time on the creep behavior of PC was examined in a previous paper [18] and O'connell et al presented that effect from the tests of the stress relaxation response of PC under torsion deformations [15]; however, more details are presented in this report. Data were obtained for all the pre-aging temperatures, but only the results at 130°C are presented here.…”

Section: Effect Of Pre-aging Time On Creep Behaviormentioning

confidence: 85%

“…A time-physical aging superposition has been established for the creep behavior of a stainless steel-fiber/PPE composite. The creep behavior during the progress of physical aging can be estimated using this superposition principle based on time-temperature viscoelastic theory [18][19]. However, few attempts have sought to estimate the influence of several factors that are known to affect creep behavior, including the thermal history before the creep test.…”

Section: Introductionmentioning

confidence: 99%

Effect of Thermal History on the Creep Behavior of Polycarbonate

Sakai

Somiya

2009

JMMP

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Thermoplastic resin is often used to form molded material without post-curing or aging treatments. Creep and physical aging occur simultaneously in such material, and these effects are dependent on the time and temperature. The effects of physical aging after molding are also dependent on the thermal history of the material, and this has a large influence on the mechanical properties, especially creep. It is therefore necessary to control the progress of physical aging when designing materials. In this study, we examined the creep deformation of polycarbonate to determine the thermal history as the effect of physical aging on the creep behavior. The physical aging effects had a distinct time and temperature dependency that also affected the density of the material. Our findings showed that it was possible to calculate the effect of the thermal history on physical aging using only the relationship between physical aging and density.

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Estimating creep deformation of glass-fiber-reinforced polycarbonate

Cited by 13 publications

References 10 publications

Estimating the creep behavior of glass-fiber-reinforced polyamide considering the effects of crystallinity and fiber volume fraction

Estimating the creep behavior of glass-fiber-reinforced polyamide considering the effects of crystallinity and fiber volume fraction

Time-and temperature-dependent compressive behavior of woven carbon fabric reinforced polyamide composite laminate

Effect of Thermal History on the Creep Behavior of Polycarbonate

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