Geometrically non-linear analysis of laminated composite structures using a 4-node co-rotational shell element with enhanced strains

2007 ◽  
Vol 42 (6) ◽  
pp. 864-881 ◽  
Author(s):  
Ki-Du Kim ◽  
Sung-Cheon Han ◽  
Songsak Suthasupradit
Keyword(s):  
Composite Structures ◽  
Laminated Composite ◽  
Shell Element ◽  
Linear Analysis ◽  
Laminated Composite Structures ◽  
Rotational Shell ◽  
Non Linear

The effect of multi-directional stiffness degradation on the non-linear analysis of composite laminates

2012 ◽  
Vol 19 (2) ◽  
pp. 127-137
Author(s):  
Sung-Cheon Han ◽  
Won-Hong Lee ◽  
Weon-Tae Park
Keyword(s):  
Composite Laminates ◽  
Composite Structures ◽  
Shear Deformation Theory ◽  
Laminated Composite ◽  
Shell Element ◽  
Linear Analysis ◽  
Matrix Cracking ◽  
Stiffness Degradation ◽  
Non Linear ◽  
Directional Stiffness

AbstractA formulation of element-based Lagrangian 9-node shell element based modified first-order shear deformation theory is improved for non-linear behaviors of composite laminates containing matrix cracking. Using the refined ANS (assumed natural strain) shell elements either show the optimum combination of sampling points with an excellent accuracy or remove the locking phenomenon. The multi-directional stiffness degradation caused by matrix cracking, which was proposed by Duan and Yao, is conducted. Natural coordinate based higher-order transverse shear strains are used in the present shell element. Numerical examples demonstrate that the present element behaves reasonably satisfactorily either for the linear or geometrical non-linear analysis of laminated composite structures. The results of laminated composite shells with matrix cracking may be the benchmark test for the non-linear analysis of damaged composite laminates.

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