首页> 外文会议>International Conference on Solidification Science and Processing: Outlook for the 21st Century, Feb 18-21, 2001, Bangalore, India >Development of Incremental FEM Based Deformation Model for Continuous Caster Strand, Incorporation of Aitken-Steffensen Algorithm for Fast Computation and Sensitivity Analysis of Constitutive Parameters on the Predictions of Stress-Strain
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Development of Incremental FEM Based Deformation Model for Continuous Caster Strand, Incorporation of Aitken-Steffensen Algorithm for Fast Computation and Sensitivity Analysis of Constitutive Parameters on the Predictions of Stress-Strain

机译:基于增量有限元的连铸坯变形模型的开发,Aitken-Steffensen算法的快速计算以及本构参数对应力应变预测的敏感性分析

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摘要

The knowledge of stress-strain field within the solidified shell is key to the understanding of crack formation as well as fracture of solid shell leading to operational breakout during continuous casting of steels. The stress-strain field is usually calculated by using the finite-element model that uses physical and constitutive properties of steel at elevated temperature as well as the thermal field in the strand. In the present work an incremental FEM based deformation model was developed for stress-strain calculations. The computation time was drastically reduced using Aitken-Steffensen algorithm. Further the predicted results were shown to be highly sensitive to elastic modulus and some of the constitutive parameters. It was thus suggested that experimentally generated stress-strain curves for a given alloy, at different temperatures and strain rates, should be preferred to simple constitutive equations.
机译:凝固壳内应力应变场的知识是理解裂纹形成以及固体壳破裂导致钢连续铸造过程中发生操作破裂的关键。通常使用有限元模型来计算应力应变场,该模型利用钢在高温下的物理和本构特性以及钢绞线上的热场。在目前的工作中,基于增量有限元的变形模型被开发用于应力-应变计算。使用Aitken-Steffensen算法可以大大减少计算时间。此外,预测结果还显示出对弹性模量和某些本构参数高度敏感。因此,建议在给定合金的不同温度和应变速率下,通过实验生成的应力-应变曲线应优于简单的本构方程。

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