Composite Buckling Analysis Using Discrete Damage Modeling
Date
2019-01Author
McQuien, J. Scott
Iarve, Endel V.
Mollrnhauer, David H.
Braginsky, Michael
Stuebner, Michael
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**Please note that the full text is embargoed** ABSTRACT: A Total-Lagrange formulation for geometric nonlinearity was implemented within the Rx-FEM framework. Rx-FEM is a discrete damage modeling method for progressive damage analysis which introduces displacement discontinuities to represent matrix cracks and delaminations in composite materials. The effects of geometric nonlinearity on other Rx-FEM material nonlinearities were then demonstrated by leveraging the formulation against a twocell frame demonstration problem. Geometric nonlinearity was shown to enable the simulation of buckling of the composite laminate, which was significantly influenced by the presence and growth of matrix cracks.