在岩石工程中,大量的失稳现象都与岩石的蠕变特性相关。传统西原模型是目前可以比较好地描述岩石蠕变过程曲线的元件模型,但是,西原模型使用的元件为黏弹、黏塑性元件(如图1),难以描述岩石屈服破坏后进入加速阶段的蠕变变形。滑坡预报,特别是临滑预报在地质灾害防治领域具有重要意义。 通过编写abaqus UMAT子程序,可得到如下...
A 21-year-old man has consulted for recurrent lumbosciatica that has been evolving for 1 year. Clinical exam was normal. Plain radiographic films disclosed a lytic lesion throughout the bodies of L4 and L5 and calcifications...doi:10.1016/j.rhum.2004.12.024Fatiha BzamiRevue Du Rhumatisme...