A four-node degenerated shell element with drilling degrees of freedom

被引:1
|
作者
Kim, JH [1 ]
Lee, BC [1 ]
机构
[1] Korea Adv Inst Sci & Technol, Dept Engn Mech, Taejon 305701, South Korea
关键词
degenerated shell element; drilling DOF; Allman-type displacement approximation; composite laminated shell structures; folded structures; true drilling rotation;
D O I
10.12989/sem.1998.6.8.921
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
A new four-node degenerated shell element with drilling degrees of freedom (DOF) is proposed. Allman-type displacement approximation is incorporated into the formulation of degenerated shell elements. The approximation improves in-plane performance and eliminates singularities of system matrices resulted from DOF deficiency. Transverse shear locking is circumvented by introducing assumed covariant shear strains. Two kinds of penalty energy are considered in the formulation for the purpose of suppressing spurious modes and representing true drilling rotations. The proposed element can be applied to almost all kinds of shell problems including composite laminated shell structures and folded shell structures. Numerical examples show that the element is of good accuracy and of reasonably fast convergence rate.
引用
收藏
页码:921 / 937
页数:17
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