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一种基于归一化参数的蠕变模型

王延荣 程域钊 李宏新 刘香 田爱梅

王延荣, 程域钊, 李宏新, 刘香, 田爱梅. 一种基于归一化参数的蠕变模型[J]. 航空动力学报, 2017, 32(3): 683-688. doi: 10.13224/j.cnki.jasp.2017.03.021
引用本文: 王延荣, 程域钊, 李宏新, 刘香, 田爱梅. 一种基于归一化参数的蠕变模型[J]. 航空动力学报, 2017, 32(3): 683-688. doi: 10.13224/j.cnki.jasp.2017.03.021
A creep model based on normalized parameters[J]. Journal of Aerospace Power, 2017, 32(3): 683-688. doi: 10.13224/j.cnki.jasp.2017.03.021
Citation: A creep model based on normalized parameters[J]. Journal of Aerospace Power, 2017, 32(3): 683-688. doi: 10.13224/j.cnki.jasp.2017.03.021

一种基于归一化参数的蠕变模型

doi: 10.13224/j.cnki.jasp.2017.03.021
基金项目: 国家自然科学基金(51475022,50571004)

A creep model based on normalized parameters

  • 摘要: 针对传统蠕变模型(如Norton律)不能模拟蠕变第3阶段的不足,提出了一种基于归一化参数的蠕变模型,该模型以归一化时间为变量,以归一化应力和归一化温度为参数,可完整描述蠕变曲线的所有3个阶段.在该模型的基础上提出了能更好地描述蠕变曲线第1阶段的改进形式.利用所发展的模型对直接时效GH4169G材料的蠕变试验曲线3个阶段进行了较好地模拟,验证了该模型的描述蠕变变形的能力;同时确立了所发展模型中各参数与归一化温度和归一化应力之间的函数关系,取得了较好的效果;并且能与有限元软件结合,表明所发展的模型可应用于实际结构的蠕变分析.

     

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出版历程
  • 收稿日期:  2015-07-06
  • 刊出日期:  2017-03-28

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