プラスチックの一段階定荷重球押込み硬さ試験に現れる粘弾性現象の理論的・実験的研究

I.一定荷重保持時間中の圧子球下におけるプラスチックの全ひずみと変形抵抗の理論式

抄録

This study aims at establishing quantitative methods for determining the viscoelastic properties of plastics using a ball indenting hardness test. In this paper, the theoretical relationships between strain, flow stress of plastics under a rigid ball indenter and time were analyzed. A simple and intelligible time dependent theoretical expressions for total strain and flow stress of plastics under a rigid ball indenter having a constant load were obtained.