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Study of self-heating and local strain rate in polyamide-6 and short fibre glass/polyamide-6 under tension through synchronised full-field strain and temperature measurements

Daniele Finazzi (UGent) , Yuriy Sinchuk (UGent) , Ruben Sevenois (UGent) , Lode Daelemans (UGent) , Karen De Clerck (UGent) , Gilles Robert and Wim Van Paepegem (UGent)
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Abstract
This paper studies thermomechanical coupling during room-temperature tensile testing of polyamide-6 (PA6) and 50 wt% short glass fibre/PA6. The tests were performed for different fibre angles (0°, 45°, 90°), moisture contents (dry, 50%RH), and strain rates (10^(-4), 10^(-2), 10^(-1) s^(-1)). Digital image correlation (DIC) was coupled with infrared thermography. The contribution of the local strains, strain rates and temperatures to the global mechanical behaviour was investigated throughout deformation. The initial thermoelastic response was used to estimate the coefficient of thermal expansion. In PA6, neck development caused significant self-heating at high strain rates, differently between dry and 50%RH. In glass/PA6, however, temperature rises were always small (< +3 °C) despite local strain rate peaks in the fracture zone. This was ascribed to limited plastic deformation, as confirmed by post-mortem microscopy. The full-field data can be highly valuable for the development of advanced constitutive models for both pure polymer and short fibre composite.
Keywords
Polyamide-6 (PA6), Short fibre-reinforced composites (SFRPs), Tensile tests, Digital image correlation (DIC), Self-heating

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MLA
Finazzi, Daniele, et al. “Study of Self-Heating and Local Strain Rate in Polyamide-6 and Short Fibre Glass/Polyamide-6 under Tension through Synchronised Full-Field Strain and Temperature Measurements.” POLYMER TESTING, vol. 132, 2024, doi:10.1016/j.polymertesting.2024.108361.
APA
Finazzi, D., Sinchuk, Y., Sevenois, R., Daelemans, L., De Clerck, K., Robert, G., & Van Paepegem, W. (2024). Study of self-heating and local strain rate in polyamide-6 and short fibre glass/polyamide-6 under tension through synchronised full-field strain and temperature measurements. POLYMER TESTING, 132. https://doi.org/10.1016/j.polymertesting.2024.108361
Chicago author-date
Finazzi, Daniele, Yuriy Sinchuk, Ruben Sevenois, Lode Daelemans, Karen De Clerck, Gilles Robert, and Wim Van Paepegem. 2024. “Study of Self-Heating and Local Strain Rate in Polyamide-6 and Short Fibre Glass/Polyamide-6 under Tension through Synchronised Full-Field Strain and Temperature Measurements.” POLYMER TESTING 132. https://doi.org/10.1016/j.polymertesting.2024.108361.
Chicago author-date (all authors)
Finazzi, Daniele, Yuriy Sinchuk, Ruben Sevenois, Lode Daelemans, Karen De Clerck, Gilles Robert, and Wim Van Paepegem. 2024. “Study of Self-Heating and Local Strain Rate in Polyamide-6 and Short Fibre Glass/Polyamide-6 under Tension through Synchronised Full-Field Strain and Temperature Measurements.” POLYMER TESTING 132. doi:10.1016/j.polymertesting.2024.108361.
Vancouver
1.
Finazzi D, Sinchuk Y, Sevenois R, Daelemans L, De Clerck K, Robert G, et al. Study of self-heating and local strain rate in polyamide-6 and short fibre glass/polyamide-6 under tension through synchronised full-field strain and temperature measurements. POLYMER TESTING. 2024;132.
IEEE
[1]
D. Finazzi et al., “Study of self-heating and local strain rate in polyamide-6 and short fibre glass/polyamide-6 under tension through synchronised full-field strain and temperature measurements,” POLYMER TESTING, vol. 132, 2024.
@article{01HPKKW4536F09QX221966778V,
  abstract     = {{This paper studies thermomechanical coupling during room-temperature tensile testing of polyamide-6 (PA6) and 50 wt% short glass fibre/PA6. The tests were performed for different fibre angles (0°, 45°, 90°), moisture contents (dry, 50%RH), and strain rates (10^(-4), 10^(-2), 10^(-1)  s^(-1)). Digital image correlation (DIC) was coupled with infrared thermography. The contribution of the local strains, strain rates and temperatures to the global mechanical behaviour was investigated throughout deformation. The initial thermoelastic response was used to estimate the coefficient of thermal expansion. In PA6, neck development caused significant self-heating at high strain rates, differently between dry and 50%RH. In glass/PA6, however, temperature rises were always small (< +3 °C) despite local strain rate peaks in the fracture zone. This was ascribed to limited plastic deformation, as confirmed by post-mortem microscopy. The full-field data can be highly valuable for the development of advanced constitutive models for both pure polymer and short fibre composite.}},
  articleno    = {{108361}},
  author       = {{Finazzi, Daniele and Sinchuk, Yuriy and Sevenois, Ruben and Daelemans, Lode and De Clerck, Karen and Robert, Gilles and Van Paepegem, Wim}},
  issn         = {{0142-9418}},
  journal      = {{POLYMER TESTING}},
  keywords     = {{Polyamide-6 (PA6),Short fibre-reinforced composites (SFRPs),Tensile tests,Digital image correlation (DIC),Self-heating}},
  language     = {{eng}},
  pages        = {{15}},
  title        = {{Study of self-heating and local strain rate in polyamide-6 and short fibre glass/polyamide-6 under tension through synchronised full-field strain and temperature measurements}},
  url          = {{http://doi.org/10.1016/j.polymertesting.2024.108361}},
  volume       = {{132}},
  year         = {{2024}},
}

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