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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。
Aiming at the physical properties of double-layer multi-function fabric, uniaxial compression tests of materials under quasi-static and dynamic conditions were carried out by using material testing machine and separate Hopkinson pressure bar device. The stress-strain curves of the material under different strain rates And material failure stress, strain. The experimental results show that the dynamic failure strength of the double-layer multi-function fabric is obviously higher than that of the quasi-static failure strength, and the dynamic failure strength of the double-layer multi-function fabric tends to increase with the increase of the strain rate, ie, the material has obvious strain rate hardening effect. The stress-strain curve is fitted and the constitutive relation between the dynamic and the static viscoelasticity of the material is given. The failure strain and material damage of double-layer multi-function fabric at different strain rates were also analyzed.