六种高分子材料动静态力学特性和能量耗散
Dynamic and static mechanical properties and energy dissipation of six polymer materials
邢永杨 1汪海波 1王梦想 1吕闹 1程兵1
作者信息
- 1. 安徽理工大学 土木建筑学院,淮南 232001
- 折叠
摘要
为探究不同高分子材料作为聚能管管材对于聚能爆破的影响,利用电液伺服压力机和直径 50 mm的分离式霍普金森压杆分别开展不同高分子材料在准静态下的单轴抗压试验,以及在冲击荷载作用下的单轴压缩试验,对其动静态力学性能、纵波波速、变形特征及能量耗散进行了研究.结果表明,不同高分子材料之间的波阻抗及准静态单轴抗压强度之间最大差值分别达到了 42.5％和 312.3％;在冲击荷载作用下,不同高分子材料的应力-应变曲线均在曲线末端出现了回弹现象,聚氯乙烯(PVC)材料的峰值应力在不同冲击气压下均为 6种高分子材料中相对较高的;从对能量的透射、耗散率和单位质量耗散能方面分析,PVC材料的能量透射率是 6种高分子材料中最高的,能量耗散和单位质量耗散能是最低的;从岩石爆破角度,引入吸收阻抗比与入射能进行拟合分析,PVC和聚碳酸酯(PC)材料的拟合曲线的相关系数相对较高,更符合炸药爆炸时能量传递的描述.最后,综合所有分析认为PVC材料在试验所用的6种高分子材料中最适合作为聚能管管材.
Abstract
In order to investigate the effect of different polymer materials as energy gathering tube tubes on energy gathering blasting,uniaxial compressive experiments on different polymer materials under quasi-static conditions were conducted using an electro-hydraulic servo press and a 50 mm diameter split-Hopkinson pressure bar.The static and dynamic mechanical properties,longitudinal wave velocity,energy dissipation and the deformation characteristics were studied.The results show that the maximum difference in wave impedance and quasi-static uniaxial compressive strength between different polymer materials reaches 42.5％and 312.3％,respectively.Under the impact load,the stress-strain curves of different polymer materials exhibit rebound phenomenon at the end of the curves,and the peak stress of polyvinyl chloride(PVC)material is relatively higher among the six polymer materials under different impact pressures.From the analysis of energy transmission,dissipation rate and unit mass dissipation energy,PVC material has the highest energy transmittance among the six polymer materials,while energy dissipation and unit mass dissipation energy are the lowest.From the perspective of rock blasting,the absorption impedance ratio and incident energy are introduced for fitting analysis.The correlation coefficient between the fitting curves of PVC and polycarbonate(PC)materials is relatively high,which is more in line with the description of energy transfer during explosive explosion.Finally,based on all the analyses,it is believed that PVC material is the most suitable polymer material among the six types used in the experiment as a pipe material for energy gathering tubes.
关键词
高分子材料/聚能管/动态压缩/吸收阻抗比/分离式霍普金森压杆(SHPB)Key words
polymer materials/concentrated energy tube/dynamic compression/absorption impedance ratio/split-Hopkinson pressure bar(SHPB)引用本文复制引用
出版年
2024
NETL
NSTL
万方数据