Simulation of cup–cone fracture using the cohesive model

Fracture and damage mechanics modelling of thin-walled structures – An overview

“…Cohesive elements are inserted either along a predefined crack path or along all continuum elements' boundaries within a distinct region. The latter option allows crack propagation in arbitrary directions [68,69].…”

Comparison of different stress-state dependent cohesive zone models applied to thin-walled structures

“…The first one starts with a traction-separation law proposed by Scheider [13], in which the main parameters are triaxiality dependent, the other one starts with the plasticity within a finite fracture process zone and adds a damage behaviour aft er a critical state (the failure strain) depending on triaxiality [8,9]. The first one will be called Scheider-approach, the latter Banerjee-approach in the following in order to distinguish easily between the models.…”

“…In this investigation the cohesive energy is therefore assumed to be constant, and thus the critical separation is calculated based on a fixed cohesive energy. Traction separation laws used in this investigation: (a) proposed in [13], based on two cohesive quantities, σmax and δn0, Eq. 3, δn1and δn2; (b) proposed in [9], derived from plastici ty with strain based failure criterion, Eq.…”

Residual strength prediction of a complex structure using crack extension analyses

“…where indices I,II,III stand for different fracture modes (normal, in-plane and out-of-plane shear), and the function g describes the interaction between different fracture modes, see also [21]. This multiplicative decomposition of the interaction law is advantageous for an independent choice of the separation behaviour of a single fracture mode and the mode interaction.…”