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归一化参数蠕变模型的程序实现与验证

程域钊 王延荣 李宏新 田爱梅

程域钊, 王延荣, 李宏新, 田爱梅. 归一化参数蠕变模型的程序实现与验证[J]. 航空动力学报, 2017, 32(3): 697-703. doi: 10.13224/j.cnki.jasp.2017.03.023
引用本文: 程域钊, 王延荣, 李宏新, 田爱梅. 归一化参数蠕变模型的程序实现与验证[J]. 航空动力学报, 2017, 32(3): 697-703. doi: 10.13224/j.cnki.jasp.2017.03.023
Implementation and validation of creep model based on normalized parameters[J]. Journal of Aerospace Power, 2017, 32(3): 697-703. doi: 10.13224/j.cnki.jasp.2017.03.023
Citation: Implementation and validation of creep model based on normalized parameters[J]. Journal of Aerospace Power, 2017, 32(3): 697-703. doi: 10.13224/j.cnki.jasp.2017.03.023

归一化参数蠕变模型的程序实现与验证

doi: 10.13224/j.cnki.jasp.2017.03.023
基金项目: 国家自然科学基金(51475022,50571004)

Implementation and validation of creep model based on normalized parameters

  • 摘要: 为了准确模拟实际构件的蠕变行为和应力松弛效应,在通用有限元程序环境下,利用其提供的用户可编程特性工具,将所发展的一种能完整描述蠕变3个阶段变形特征的归一化参数模型编制成用户子程序.考查了子程序计算结果与试验数据的差异、时间步长对计算结果的影响,并对不同规模有限元模型的计算耗时作了对比分析.针对变载(应力、温度)情形,在子程序中实现了时间硬化理论和应变硬化理论,并提出的介于两者之间的相对时间硬化理论.对带孔平板进行了实例计算,表明所发展的模型能够与有限元结果对实际结构进行蠕变模拟,计算结果的规律说明所发展的方法可较好地模拟实际构件的蠕变行为和应力松弛效应,验证了子程序的有效性.

     

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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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