宽温域下Talc/NR复合材料的力学性能及本构分析  

Mechanical Properties and Constitutive Analysis of Talc/NR Composite Under Wide Temperature Range

作　　者：雷经发 沈俊杰[1] 刘涛 王璐 赵晨霞[1] LEI Jingfa;SHEN Junjie;LIU Tao;WANG Lu;ZHAO Chenxia(School of Mechanical and Electrical Engineering,Anhui Jianzhu University,Hefei,Anhui 230601,China;Anhui Education Department Key Laboratory of Intelligent Manufacturing of Construction Machinery,Anhui Jianzhu University,Hefei,Anhui 230601,China)

机构地区：[1]安徽建筑大学,机械与电气工程学院,安徽合肥230601 [2]安徽建筑大学,工程机械智能制造安徽省教育厅重点实验室,安徽合肥230601

出　　处：《塑料》2025年第1期52-57,共6页Plastics

基　　金：合肥市自然科学基金(2021019);安徽高校自然科学研究重大项目(KJ2021ZD0068,KJ2023AH040036);安徽省教育厅高校优秀拔尖人才培育资助项目(gxbjZD2020078)。

摘　　要：为研究滑石(Talc)/天然橡胶(NR)复合材料在冲击载荷下的力学性能,采用万能材料试验机及分离式Hopkinson压杆(SHPB)实验装置对3种不同含量的Talc/NR复合材料在常温(20℃)下进行准静态压缩实验及宽温域(20~140℃)、高应变率(2000~4000 s^(-1))下的动态压缩实验,并且,分别采用朱-王-唐(ZWT)模型及Mooney-Rivlin模型与Maxwell单元组合模型对实验数据进行拟合。结果表明,材料在准静态及动态压缩下具有较好的应变率效应,在动态压缩过程中,产生了明显的应变硬化现象;当温度由20℃升高至60、100、140℃时,硬度60 A试样在应变率为3000 s^(-1)时的峰值应力由45.367 MPa递减至34.367、23.200及16.069 MPa,表现出明显的温度效应;与ZWT模型相比,组合模型在曲线硬化阶段拟合效果较好,并且,能体现材料温度效应,适用于表征材料在宽温域高应变率下的力学行为。In order to reveal the mechanical properties of talc/NR composite materials under impact load,quasi-static compression experiments at room temperature(20℃)and dynamic compression experiments at a wide temperature range(20~140℃)and high strain rates(2000~4000 s^(-1))were conducted for three different proportion talc/NR composite materials using universal material testing machine and split Hopkinson pressure bar(SHPB)experimental device.The Zhu-Wang-Tang(ZWT)model and the Mooney-Rivlin model combined with the Maxwell unit were used to fit the experimental data.Results showed that materials displayed strain rate effect under both quasi-static and dynamic compression,and obvious strain hardening phenomenon occurred during dynamic compression.When the temperature increased from 20℃to 60,100 and 140℃,the peak stress of the 60 A specimens decreased from 45.367 MPa to 34.367,23.200 and 16.069 MPa at the strain rate of 3000 s^(-1),showing a significant temperature effect.The combined model exhibited better fitting performance than the ZWT model in the strain hardening phenomenon and could effectively manifest the temperature effect of the material.It was suitable for characterizing the mechanical behavior of the material at high strain rates under a wide temperature range.

关 键 词：Talc/NR 复合材料 宽温域 静动态力学性能 本构模型 

分 类 号：TQ332[化学工程—橡胶工业]