Computational Micromechanical Model for Tensile Failure in Composites with Fibre-Pullout
Abstract
This work was cooperated with Asscociate Professor Frans van der Meer (Faculty of Civil Engineering and Geosciences, TU Delft) and Assisstant Professor Boyang Chen (Faculty of Aerospace Engineering, TU Delft). My research topic was to develop a Cohesive Element connecting the Beam element and Solid element (beam-solid CE), which can increase the computational efficiency due to fewer degrees of freedom. Two main perspectives can make contributions to the motivation. On the one hand, normally in 3D space, the structural(beam) elements provide fewer degrees of freedom. On the other hand, larger mesh size can be applied due to the higher order continuity of the structural element, leading to fewer degrees of freedom as well. In accordance with the derivation of the beam-solid CE, the Finite Elment Method code was implemented by the open source C++ library Jive. To verify the validity of the beam-solid CE, numerical results were compared with analytical benchmark solutions of the existing literature with respect to Double Cantilever Beam(DCB), End-Notch Flexure(ENF) and Mixed-Mode Bending(MMB) tests.
I. DCB test
II. ENF test
III. MMB test
IV. Computational Efficiency
