| Title |
A Study on the Non-Linear Finite Element Analysis of Folded Plate Structures |
| Abstract |
The finite element analysis considering geometrical nonlinearity and material nonlinearity has been used to investigate the nonlinear behavior of folded plate structure. The element stiffness is derived by superimposing its membrane and bending stiffness matrices, and the reduced integration is used to avoid the locking effect of serendipity Mindlin plate element. The elasto-plastic incremental constitutive relation is defined with von-Mises yield criterion and an associated flow rule in which the plastic potential is assumed to be the yeild function. An approximate non-linear analysis is achived by a discrete layered approach and the incremental/iterative solution. A folded plate structure subjected to an uniformly distributed load and a deck plate under a concentrated load is used to show the capability of computer program. The results indicate that the linear elasto-plastic analysis can not be a useful approximation because local buckling of the individual component plate elements significantly bears upon structural integrity. The applicability of the present method for detailed investigation of folded plate structures is demonstrated |