%0 Journal Article
%T A NON-LINEAR VISCOELASTIC-PLASTIC CONSTITUTIVE MODEL FOR GLASSY POLYMER PMMA<br>玻璃态高聚物PMMA的非线性粘弹-塑性本构方程
%A Zhu Xixiong
%A Zhu Guorui
%A Huang Xusheng
%A Chen Jiangying
%A <br>朱锡雄
%A 朱国瑞
%A 黄旭昇
%J 力学学报
%D 1993
%I 
%X This paper discusses the expressions of macroscopic mechanics for theuniaxial-compression stress-strain behaviour of glassy polymer PMMA, i.e. the constitutive relations, according to the experimental data. A non-linear viscoelastic- plastic constitutive model composed of an activation dashpot by taking into account of the strain-hardening effect coupl in series with a standard linear solid or a Maxwell body is suggested. The comprehensive constitutive equations both in differential and integral forms are provided. When these equations are used to fit to the experimental stress- strain curves of loading-and-unloading cycle, the results show that the agreements are reasonably good.
%K polymethyl methacrylate (PMMA)
%K constitutive equation
%K viscoelastic deformation
%K plastic deformation
%K strain softening
%K strain hardening<br>PMMA
%K 本构方程
%K 粘弹性
%K 变形
%K 高聚物
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=5D344E2AD54D14F8&jid=4100DA4A1A3BA1B0CE5AD99AE1DFB420&aid=AD83051AE641B5BBD97CCF465CAF313F&yid=D418FDC97F7C2EBA&vid=C5154311167311FE&iid=CA4FD0336C81A37A&sid=89F76E117E9BDB76&eid=4DB1E72614E68564&journal_id=0459-1879&journal_name=力学学报&referenced_num=1&reference_num=7