Application of the Time-Temperature Superposition Principle to the Impact Property for Notched Polycarbonate Specimens Based on the Elastic-Plastic Analysis for High Speed Tensile Test

高速引張試験の弾塑性解析に基づく ポリカーボネートの衝撃特性における時間-温度換算則の適用

Recently, high speed tensile test is being recognized as a standard testing method to confirm the strength under dynamic loads for engineering plastics. In the authors' previous study, elastic strain rate concentrations are discussed by FEM. In this study, elastic-plastic FEM analysis is performed to confirm the real strain rate appearing at the notch root. Then, the master curve for the final fracture elongation for polycarbonate is constructed. It is found that the fracture behavior can be predicted for the wide range of impact speed under various temperatures from the master curve based on elastic-plastic analysis.高分子材料の強度は温度と速度によって変化し,特定の条件下で脆性破壊へと遷移する.特に応力集中がある場合には切欠き底で脆性破壊を起こす場合があり,その原因が切欠き底で高いひずみ速度が生じるためと考えられる.本研究では切欠き底でのひずみ速度と破断ひずみを整理し,時間-温度換算則が成立することを示す.

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  • Accession Number: 01673456
  • Record Type: Publication
  • Source Agency: Japan Science and Technology Agency (JST)
  • Files: TRIS, JSTAGE
  • Created Date: May 15 2018 3:05PM