摘要
本文研究了酞侧基聚芳醚酮(PEK—C)不同温度与不同形变速率下的拉伸屈服行为.发现屈服应力(σ_y)随温度升高而下降,随形变速率对数值的增大而增加.屈服应力对温度及形变速率的依赖性可用Eyring理论来拟合.屈服能量(E_y)随温度升高而线性下降,从中可以求出屈服时所需热能(b)与机械性能(b＇)的比(b/b＇).杨氏模量(γ)、屈服应变(ε_y)亦随温度升高而下降.
The tensile yield behaviour of phenolphthalein polyether ketone(PEK -C)at different temperature and strain rate was studied. The yield stress decreased with the increase of temperature and increased with the increase of log strain rate. The dependence of yield stress on the temperature and strain rate could be modelled by using Eyring Theory. The yield energy was found to be a liner function of temperature, from which the ratio of thermal energy to mechanical energy required to produce yielding could be obtained. Young's modulus and yield strain decreased also with the increase of temperature.
出处
《塑料工业》
CAS
CSCD
北大核心
1995年第2期22-25,共4页
China Plastics Industry
基金
国家自然科学基金重点项目
关键词
聚芳醚酮
屈服应力
拉伸
Phenolphthalein Polyether Ketone Yield Stress Yield Energy Yield Strain Young's Modulus Eyring Theory
