中国机械工程 ›› 2015, Vol. 26 ›› Issue (14): 1978-1982.

• 机械基础工程 • 上一篇    下一篇

一种修正的Norton-Hoff本构模型及实验验证

王巧玲;唐炳涛;郑伟   

  1. 山东建筑大学,济南,250101
  • 出版日期:2015-07-25 发布日期:2015-08-05
  • 基金资助:
    国家自然科学基金资助项目(51375280);教育部新世纪优秀人才支持计划资助项目(NCET-12-1028);山东省自然科学基金资助重点项目(ZR2013EEZ003)

A Modified Norton-Hoff Constitutive Model and Experimental Verification

Wang Qiaoling;Tang  Bingtao;Zheng  Wei   

  1. Shandong Jianzhu  University,Jinan,250101
  • Online:2015-07-25 Published:2015-08-05
  • Supported by:
    National Natural Science Foundation of China(No. 51375280);Program for New Century Excellent Talents in University of Ministry of Education of China(No. NCET-12-1028);Shandong Provincial Natural Science Foundation of China(No. ZR2013EEZ003)

摘要:

针对B1500HS硼钢,采用Gleeble-1500D热模拟试验机,通过单轴拉伸试验对其在温度为550~850℃、应变速率为0.1~10s-1范围内的本构关系进行了研究。根据硼钢流动应力曲线的特点,对Norton-Hoff模型进行了修正,将修正后的模型与Brosius提出的Norton-Hoff模型和Tong-Wahlen模型进行比较,并通过预测值偏离实验值的程度进行评估。与实验结果对比后发现:修正的Norton-Hoff模型能更好地预测B1500HS硼钢的流动应力。

关键词: 本构模型, 硼钢, 流动应力, Norton-Hoff模型, Tong-Wahlen模型

Abstract:

In  order  to  establish  constitutive descriptions for B1500HS  boron steel,it  was subjected  to isothermal uniaxial tensile testing on a Gleeble 1500  thermomechanical simulator at  temperatures  ranging  from  550℃ to  850℃ and  strain  rates  ranging  from 0.1s-1  to 10s-1.According to the characteristics of the flow  stress  curve of boron steel,Norton-Hoff  model was modified.The  predicted flow stresses using the modified model were compared with Tong-Wahlen  model,Norton-Hoff  model  proposed  by  Brosius,and
 evaluated  by the degree of the predicted value  deviation from the experimental values.By comparison with the experimental results,it shows that the modified Norton-Hoff  model  is  better  to  predict  the  flow stress of B1500HS boron steel.

Key words: constitutive , equation;boron , steel;flow , stress;Norton-Hoff , model;Tong-Wahlen , model

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