摘要
蠕变作为秸塑复合材料的重要力学性质之一,其蠕变性能与应力、温度与时间等参数密切相关。为了研究探讨秸塑复合材料的蠕变性能,进行了等温不同拉应力以及等拉应力不同温度下的蠕变实验。利用时间-温度-应力等效性原理与Burgers模型拟合得到了秸塑复合材料在参考温度、参考应力下的蠕变主曲线及其表达式,再利用时间-温度-应力等效性原理中的WLF方程对该材料在低温或低应力水平程度下蠕变柔量进行了推导。从而能够通过秸塑复合材料在较高温度或较高应力条件下的短时间蠕变行为,来预测该类材料在低温或较低应力水平下的长时间蠕变行为。
Creep is one of the important mechanical properties for straw plastic composite.The creep performance is closely related to stress,temperature and time.In order to study the creep properties of SPC,creep experiments were carried out under different stresses and temperature.Based on the principle of time temperature stress equivalence and Burgers model,the master curve of creep and their expressions of SPC under reference temperature and reference stress were obtained,and the creep compliance of the composite under low temperature or low stress was deduced by WLF equation according to the principle of time temperature stress equivalence.Therefore,the long-term creep behavior of SPC at low temperature or low stress level could be predicted by the short-term creep behavior at high temperature or high stress level.
作者
张思成
盛冬发
董春雷
齐荣庆
ZHANG Sicheng;SHENG Dongfa;DONG Chunlei;QI Rongqing(Civil Engineering Institute,Southwest Forestry University,Kunming 650224,China;Material Science Engineering Institute,Southwest Forestry University,Kunming 650224,China)
出处
《功能材料》
EI
CAS
CSCD
北大核心
2020年第10期10110-10115,共6页
Journal of Functional Materials
基金
国家自然科学基金资助项目(11862023)
云南省科技厅青年资助项目(2018FD049)
云南省教育厅科学基金资助项目(2020Y0383)。
