SANDWICH COMPOSITE BAR ELEMENT FOR GEOMETRIC NONLINEAR ANALYSIS

Abstract eng:
The contribution deals with the straight sandwich bar element derived by new nonincremental full geometric nonlinear approach. We assume a twonode straight sandwich composite bar finite element with three layers of double symmetric rectangular cross-section area. The homogenisation of the material properties is made for polynomial variation of elasticity modulus and polynomial variation of constituent´s volume fraction at the top and bottom layers. Stiffness matrix of the composite bar contains transfer constants, which accurately describe the polynomial uni-axial variation of effective Young´s modulus. In the numerical experiments different mixture rules have been considered for calculation of the effective longitudinal elasticity modulus of the composite (FGM´s) bar. The results obtained will be compared with solid element analysis in the ANSYS simulation programme.

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