摘要
用杂交应力模式导出新的特殊实体元。数值算例表明:新的元给出较8节点实体特殊杂交应力元、一般杂交应力元及假设位移元远为准确的应力值。
, Four kinds of 12-node solid elements with two parallel faces and one traction-free cylindrical surface have been developed based on the assumed stress hybrid method. The various interior stress assumptions satisfy the equilibrium equations as well as the traction-free condition over the cylindrical boundary. Example problems of a rectangular plate with a circular hole, a thin square plate with a circular hole, and a square block with a circular hole are utilized to evaluate the various elements, and a desirable stress assumption has been identified. Comparisons of present results with those obtained by using 8-node special solid assumed stress hybrid elements, 8-node ordinary solid assumed stress hybrid elements and 8-node solid assumed displacement elements indicate that the present 12-node special solid element is far superior in predicting the distributions of the circumferential stresses and the stress concentration factors.
出处
《力学学报》
EI
CSCD
北大核心
1989年第3期373-378,共6页
Chinese Journal of Theoretical and Applied Mechanics
基金
国家自然科学基金
关键词
杂交应力元
杂交应力模式
圆柱面
assumed stress hybrid model,element stiffness matrix
