| 耦合蠕变损伤的Chaboche粘塑性模型的研究 |
| |
| 引用本文： | 倪永中,徐鸿.耦合蠕变损伤的Chaboche粘塑性模型的研究[J].固体力学学报,2009,30(1). |
| |
| 作者姓名： | 倪永中 徐鸿 |
| |
| 作者单位： | 华北电力大学电站设备状态监测与控制教育部重点实验室,北京,102206 |
| |
| 摘 要： | Chaboche粘塑性统一本构模型由于没有包含损伤变量,在应力恒定时只能得到不变的塑性应变速率,因此不能描述蠕变第三阶段的加速过程.该文按照Lemaitre有效应力的概念,采用Kachanov损伤演化方程,推导了耦合损伤的Chaboche粘塑性流动方程和硬化方程,并链接到有限元软件ANSYS中,将之用于高温合金钢P91的蠕变寿命计算,结果表明耦合损伤模型的模拟值与实验数据基本吻合;为该模型描述蠕变损伤和疲劳交互作用奠定了基础.
|
| 关 键 词： | 蠕变 粘塑性 损伤 |
STUDY OF THE CHABOCHE VISCO-PLASTIC MODEL ON COUPLED CREEP DAMAGE |
| |
| YongZhong Ni,Hong Xu.STUDY OF THE CHABOCHE VISCO-PLASTIC MODEL ON COUPLED CREEP DAMAGE[J].Acta Mechnica Solida Sinica,2009,30(1). |
| |
| Authors: | YongZhong Ni Hong Xu |
| |
| Institution: | Key Laboratory of Condition Monitoring and Control for Power Plant Equipment of Ministry of Education;North China Electric Power University;Changping District;Beijing;102206 |
| |
| Abstract: | The Chaboche's unified visco-plastic constitutive Model is not able to describe the acceleration process of creep in the third phase because no damage has been introduced there, under that case, a constant plastic strain rate follows the constant stress assumption. Using the Kachanov' s damage evolution equation and the Lemaitre' s effective stress conception, both the Chaboche visco-plastic flow equation and the corresponding hardening functions were derived in this paper. The modified constitutive model c... |
| |
| Keywords: | Chaboche P91 ANSYS |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
