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bo li tai gao ju wu pmma zhan dan xing li xue xing wei de lv wen deng xiao guan xi
Author(s): 
Pages: 226-231
Year: Issue:  2
Journal: Chinese Journal of Theoretical and Applied Mechanics

Keyword:  聚甲基丙烯酸甲脂粘弹-塑性本构方程率温等效归一化应力-应变曲线;
Abstract: 基于粘弹-塑性本构模型并以玻璃态高聚物PMMA在温度T=233—343K和应变率(?)=1.0 x 10-4—1.0×10-1s-1范围内实测的应力-应变曲线及其拟合计算为依据,讨论了试验材料的率温等效性,从位移因子aT和归一化应力-应变主曲线的存在,证实试验材料在屈服前存在率温等效关系,而在屈服后不复存在。
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