TY  - EJOU
AU  - Kulikov, G.M.  
AU  - Carrera, E.  
AU  - Plotnikova, S.V.  
AU  - Brischetto, S.  

TI  - Geometrically Exact Assumed Stress-Strain Four-Node Element Based on the 9-Parameter Shell Model
T2  - The International Conference on Computational \& Experimental Engineering and Sciences

PY  - 2008
VL  - 5
IS  - 3
SN  - 1933-2815

AB  - This paper presents the geometrically exact assumed stress-strain four-node element with nine displacement degrees of freedom per node. The finite element formulation developed is based on the 9-parameter shell model by employing a new concept of interpolation surfaces (I-surfaces) inside the shell body. We introduce three I-surfaces and choose nine displacements of these surfaces as fundamental shell unknowns. Such choice allows us to represent the higher-order shell formulation in a very compact form and to derive in curvilinear reference surface coordinates the strain-displacement relationships, which are objective, i.e. invariant under all rigid-body motions.
KW  - 

DO  - 10.3970/icces.2008.005.187