| 卢作伟,崔桂香.气泡在液体中运动过程的数值模拟[J].计算力学学报,1997,14(2):125~133 |
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| 气泡在液体中运动过程的数值模拟 |
| Numerical simulation of coupled creep elastoplastic damage constitutive model at large strain |
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| DOI：10.7511/jslx19972021 |
| 中文关键词: 气泡运动 位标函数 有限体积法 气液二相流 |
| 英文关键词:\ finite strain,creep,elastoplasticity,damage,coupled numerical modell consistent algorithm, |
| 基金项目:国家自然科学基金,国家教委博士点基金 |
| 卢作伟 崔桂香 |
| 清华大学工程力学系 |
| 摘要点击次数: 1598 |
| 全文下载次数: 1 |
| 中文摘要: |
| 本文用数值方法预测气泡在液体中的百定常运动。运用位标函数进行界面的隐含跟踪并且与有限体积法相结合构成一种可行的计算方法。本文方法允许在界面处存在很大的物性差，而且较容易将表面张力引入控制方程。我们对气液两相流中单个气泡的运动进行了计算，得到了与实验结果符合很好的数值结果。 |
| 英文摘要: |
| A numerical model to simulate isotropic, coupled creep elastoplastic damage constitutive behavior at finite strain is proposed in the present work. The model is developed on the basis of thermodynamics of an irreversible process and the internal state variable theory. A hyperelastic form of stress strain constitutive relation in conjunction with the multiplicative decomposition of the deformation gradient into elastic and inelastic parts is utilized. A consistent integration algorithm to update stresses and the internal state variables is derived. A consistent tangent matrix with consideration of the fully coupled effects at finite strain is formulated. |
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