双层多功能布的动静态力学性能及本构关系  

On the Static/Dynamic Mechanical Properties and Constitutive Relation of Bi-stratal Multifunction Cloth

作　　者：高光发[1,2] 李永池[1] 王道荣 章杰[1] 

机构地区：[1]中国科学技术大学近代力学系,安徽合肥230027 [2]安徽理工大学能源与安全学院,安徽淮南232001 [3]试验物理与计算数学国家级重点实验室,北京100076

出　　处：《实验力学》2011年第1期32-36,共5页Journal of Experimental Mechanics

基　　金：国家自然科学基金(10572134);国防科技重点实验室基金(51453030205ZK0101)

摘　　要：针对双层多功能布的物理特性,利用材料试验机和分离式Hopkinson压杆装置,展开了准静态和动态条件下材料的单轴抗压实验,获得了材料在不同应变率下的应力应变曲线和材料的失效应力、应变。实验结果表明:双层多功能布的动态失效强度明显高于准静态失效强度,而且随着应变率的增加,其动态失效强度呈现增加的趋势,即该材料具有明显的应变率硬化效应。对应力应变曲线进行拟合,给出了材料的动静态粘弹性本构关系。并对双层多功能布在不同应变率下的失效应变及材料的损伤结果进行了初步的分析。By means of material testing system and split Hopkinson pressure bar（SHPB） setup,quasi-static and dynamic uniaxial compressive tests were performed based on the physical properties of bi-stratal multi-function cloth.Stress-strain curves and failure stress、failure strain were obtained at different strain rates.Results show that the dynamic failure strength of bi-stratal multi-function cloth is distinctly higher than the quasi-static failure strength,and the value of the dynamic failure stress obviously increases as the strain rate increases,which indicates the material has a notable strain rate hardening effect.Quasi-static and dynamic viscoelastic constitutive equation was presented based on the fitted stress-strain curves under different strain rates.And failure strains at different strain rates and damage results of bi-stratal multi-function cloth were preliminarily analyzed.

关 键 词：双层多功能布 功能材料 应变率硬化效应 本构方程 

分 类 号：O345[理学—固体力学]