Strain rate concentration factor for flat notched specimen to predict impact strength for polymeric materials Articles uri icon

authors

  • NODA, NAO AKI
  • TAKAKI, REI
  • SHEN, YUNONG
  • INOUE, AKANE
  • SANO, YOSHIKAZU
  • AKAGI, DAICHI
  • TAKASE, YASUSHI
  • GALVEZ VILLARINO, PEDRO

publication date

  • April 2019

start page

  • 141

end page

  • 157

volume

  • 131

international standard serial number (ISSN)

  • 0167-6636

electronic international standard serial number (EISSN)

  • 1872-7743

abstract

  • n this study, the impact strength of notched specimens of polymeric materials was studied by using high speed tensile test. Focusing on the strain rate at the notch root, the final fracture elongation was expressed in terms of the time-temperature superposition principle. Fracture behavior under various impact speed and temperature can be predicted by mean of the obtained master curves. The validity of the elastic strain rate concentration factor was confirmed through elastic-plastic analyses for both polycarbonate and polydimethylsiloxane copolymerized polycarbonate. It is found that the strain rate concentration factor can be estimated from the stress concentration factor for flat test specimens.

keywords

  • impact strength; strain rate concentration factor; dynamic stress; stress concentration factor; polycarbonate; time-temperature superposition principle; notched specimen; temperature; behavior; time