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Instabilised crack growths

Author(s): P. Brož Abstract: In order to model the fracture behaviour of structures of concrete-like materials, the cohesive-crack simulation is introduced. A direct boundary element method is used and indicated to be efficient, given the circumstances that are described by non-linearity on interfaces only. Procedures for the direction quest and interface adaptation in growth study and for the stipulation of the resistance to a process zone-tip advance are worked out and tested. Softening as an instabilizing consideration included in the cohesive-crack model can bring about trajectory bifurcations (equilibrium branching), and instabilities both the internal (snapback) one and when controlled load. An account of the numerical method to perform fast computation for cohesive- crack propagation in mode I is also shown. 1 Introduction: A full... Pages: 10 Size: 856 kb Paper DOI: 10.2495/BE010021

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