摘要
为研究软质高分子聚合物材料的静、动态拉伸力学性能,利用Instron-5943万能材料试验机和改进型分离式霍普金森拉杆(SHTB)实验装置对聚氯乙烯(PVC)弹性体材料进行了静、动态拉伸实验,得到了该材料在应变率为0.1 s^(−1)及400~1850 s^(−1)下的应力-应变曲线。动态拉伸实验过程中,联合波形图分析和高速摄像方法对试样连接方式和胶黏剂进行了优选,通过脉冲整形器延缓入射波上升沿以实现恒应变率加载,调整入射杆与吸收杆间空隙解决了入射波基线偏离问题。结果表明:PVC弹性体在准静态(0.1 s^(−1))拉伸载荷下具有明显的线弹性特征,在动态(400~1850 s^(−1))拉伸载荷下具有一定的黏性特征。构建了朱-王-唐(ZWT)非线性黏弹性本构模型以表征PVC弹性体材料的黏弹性力学特征,实验与模型拟合结果较吻合。
To study the static and dynamic tensile properties of soft polymer materials,experiments of a polyvinyl chloride(PVC)elastomer were carried out using the Instron-5943 universal testing machine and an improved split Hopkinson tensile bar(SHTB)experimental device.Stress-strain curves of the material under the strain rates of 0.1 s^(−1) and 400−1850 s^(−1) were obtained.During the dynamic tensile experiment,the combination of waveform analysis and high-speed camera were adopted to optimize the connection mode and adhesive of the specimen.The pulse shaper was used to delay the rising edge of the incident wave to realize constant strain rate loading.The gap between the incident bar and the absorption bar was adjusted to deal with the baseline deviation of incident wave.Results showed that the PVC elastomer shows obvious linear elastic under quasi-static(0.1 s^(−1))tension,and certain viscosity under dynamic(400−1850 s^(−1))tension.The non-linear viscoelastic Zhu-Wang-Tang(ZWT)model was used to characterize the viscoelastic response of the PVC elastomer,and the results of experiment and simulation were in good agreement.
作者
雷经发
宣言
刘涛
姜锡权
段飞亚
魏展
LEI Jingfa;XUAN Yan;LIU Tao;JIANG Xiquan;DUAN Feiya;WEI Zhan(School of Mechanical and Electrical Engineering,Anhui Jianzhu University,Hefei 230601,Anhui,China;Anhui Education Department Key Laboratory of Intelligent Manufacturing of Construction Machinery,Hefei 230601,Anhui,China;Hefei Jiangshui Dynamic Mechanics Experimental Technology Co.,Ltd.,Hefei 230031,Anhui,China)
出处
《高压物理学报》
CAS
CSCD
北大核心
2021年第3期78-87,共10页
Chinese Journal of High Pressure Physics
基金
安徽省自然科学基金(1708085ME130)
安徽省高校优秀拔尖人才培育项目(GXBJZD2020078,GXYQZD2019057)
汽车噪声振动和安全技术国家重点实验室开放基金(NVHSKL-201407)。
