摘要
首先证明了经典塑性理论对于应变软化材料的软化速率的限制，然后基于Ｉｌｙｕｓｈｉｎ公设和塑性位势理论，提出了由峰值强度面到残余强度面应力跌落的计算方法，列出了完整的增量型边值问题及其有限元法，最后分别讨论。
It is first proved that there is a limit to softening rate of softening material in the classical theory of plasticity. Based upon IIyushin′s postulate and plastic potential theory, then the procedure of computing stress dropping of a brittle plastic body from the peak strength surface to the residual strength surface is presented. The complete boundary value problem with incremental form is formulated, accompanied by its finite element method. At last, a simple and important example with analytic solution is discussed and the effectiveness of the methods proposed in this paper is examined by an engineering example—the shiplock′s slopes of Three Gorges′ project in construction.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
1997年第1期8-21,共14页
Chinese Journal of Rock Mechanics and Engineering
基金
中国科学院院长特别基金
国家"攀登"计划资助
关键词
脆塑性
稳定性
有限元
岩体力学
Brittle plasticity, Rockmass stability, finite element
