首页 | 本学科首页   官方微博 | 高级检索  
     

纯铁材料动态力学性能测试及本构模型
引用本文:孔金星,陈辉,何宁,李亮,姜峰. 纯铁材料动态力学性能测试及本构模型[J]. 航空学报, 2014, 35(7): 2063-2071. DOI: 10.7527/S1000-6893.2013.0460
作者姓名:孔金星  陈辉  何宁  李亮  姜峰
作者单位:1. 南京航空航天大学 机电学院, 江苏 南京 210016;2. 中国工程物理研究院 机械制造工艺研究所, 四川 绵阳 621900;3. 华侨大学 机电及自动化学院, 福建 厦门 361021
摘    要:研究纯铁材料的动态力学性能并建立其本构模型是开展纯铁材料工程应用和数值模拟研究的基础,利用Instron材料试验机和分离式Hopkinson压杆试验装置,对纯铁材料进行了常温下不同应变率(10-3~5×104s-1)和应变率为104s-1时不同温度下(200~800℃)的动态力学性能测试,获得了各种载荷下的应力-应变曲线。试验结果表明,纯铁材料的塑性流动应力对应变率和温度非常敏感,具有明显的应变强化效应、应变率强化和增塑效应以及热软化效应。基于Power-Law本构方程,通过试验数据拟合得到了纯铁材料的动态本构模型参数,拟合曲线与试验数据吻合较好,表明该模型能较好描述纯铁材料在动态载荷下的力学行为。

关 键 词:纯铁材料  Power-Law本构模型  应力-应变曲线  流动应力  高应变率  SHPB  
收稿时间:2013-09-03
修稿时间:2013-11-05

Dynamic Mechanical Property Tests and Constitutive Model of Pure Iron Material
KONG Jinxing,CHEN Hui,HE Ning,LI Liang,JIANG Feng. Dynamic Mechanical Property Tests and Constitutive Model of Pure Iron Material[J]. Acta Aeronautica et Astronautica Sinica, 2014, 35(7): 2063-2071. DOI: 10.7527/S1000-6893.2013.0460
Authors:KONG Jinxing  CHEN Hui  HE Ning  LI Liang  JIANG Feng
Affiliation:1. College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;2. Institute of Mechanical Manufacturing Technology, China Academy of Engineering Physics, Mianyang 621900, China;3. College of Mechanical Engineering and Automation, Huaqiao University, Xiamen 361021, China
Abstract:To study the dynamic mechanical property and built constitutive model of pure iron material are the basis of engineering application and numerical simulation. The dynamic mechanical property test of pure iron material are carried out using Instron material testing system and split Hopkinson pressure bar apparatus under different strain rates (10-3-5×104s-1) at room temperature and different temperature (200-800℃) at high strain rate 104s-1.The stress-strain curves of pure iron are measured at high temperatures and high strain rates. The test results show that the plastic flow stress of pure iron material is sensitive to strain rate and temperature and has the effect of strain hardening, strain rate hardening plasticizing effect and thermal softening. Based on the Power-Law constitutive model, the dynamic constitutive model parameter with high strain rates and high temperatures of pure iron material is obtained by fitting the test results. The model predictions have a good agreement with test data and the dynamic constitutive model can make a satisfied prediction to the mechanial behavior of pure iron materials under dynamic loads.
Keywords:pure iron material  Power-Law constitutive model  stress-strain curves  flow stress  high strain rate  SHPB  
本文献已被 CNKI 等数据库收录!
点击此处可从《航空学报》浏览原始摘要信息
点击此处可从《航空学报》下载全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号