Numerical Investigation of Creep Damage Development in the Ni-Based Superalloy IN738 LC at 850\r { }C
Numerical Investigation of Creep Damage Development in the Ni-Based Superalloy IN738 LC at 850\r { }C
复制标题
镍基高温合金 IN738 LC 在 850 { }C 时蠕变损伤发展的数值研究
DOI：
10.3970/cmes.2002.003.313
复制
发表时间：
2002
影响因子：
2.4
通讯作者：
W. Qi
中科院分区：
文献类型：
--
作者：
W. Brocks;W. Qi
报道了镍基高温合金IN 738 LC在850 ℃下蠕变损伤发展及其对变形行为影响的数值研究结果。基于连续损伤力学的各向异性损伤模型已耦合到统一模型的Chaboche，并用于本研究。对含圆孔板的拉伸问题进行了数值计算。结果表明，所采用的损伤模型不会引起损伤局部化，也没有观察到明显的网格依赖性。关键词：各向异性损伤，蠕变损伤，损伤局部化，网格相关性。
Results of a numerical study of creep damage development and its effect on the deformation behavior in the Ni-based superalloy IN 738 LC at 850 ̊ C are reported. A continuum damage mechanics based anisotropic damage model has been coupled with the unified model of Chaboche, and is used for the present study. Numerical computations are performed on a plate containing a circular hole under tension. They show that the applied damage model does not cause damage localization and no significant mesh-dependence of the results are observed. keyword: anisotropic damage, creep damage, damage localization, mesh-dependence.