TY - JOUR
T1 - Micromechanical analysis of interlaminar crack propagation between angled plies in mode I tests
AU - Varandas, L. F.
AU - Arteiro, A.
AU - Catalanotti, G.
AU - Falzon, B. G.
PY - 2019
Y1 - 2019
N2 - This paper presents a micromechanical finite element model to study interlaminar damage propagation and relocation, known as delamination migration, between angled plies, consisting of a double-ply θ/0ð Unit Cell (UC) in-between homogenised unidirectional 0ð plies. Random fibre distributions and appropriate constitutive models are used to model the different dissipative phenomena that occur at crack onset and propagation. Varying the upper ply fibres orientation, θ, and ply thickness, it is possible to assess their influence on the damage migration mechanism. Different features associated with delamination migration are analysed, such as the distribution of interlaminar shear stresses at the crack tip and the kink angles. When comparing the results of the micromechanical model with previously conducted experimental observations, similar trends are obtained. It is concluded that the computational framework is able to simulate mode I interlaminar damage propagation and delamination migration in multidirectional laminates, providing a sound tool to better understand the conditions behind interlaminar crack migration.
AB - This paper presents a micromechanical finite element model to study interlaminar damage propagation and relocation, known as delamination migration, between angled plies, consisting of a double-ply θ/0ð Unit Cell (UC) in-between homogenised unidirectional 0ð plies. Random fibre distributions and appropriate constitutive models are used to model the different dissipative phenomena that occur at crack onset and propagation. Varying the upper ply fibres orientation, θ, and ply thickness, it is possible to assess their influence on the damage migration mechanism. Different features associated with delamination migration are analysed, such as the distribution of interlaminar shear stresses at the crack tip and the kink angles. When comparing the results of the micromechanical model with previously conducted experimental observations, similar trends are obtained. It is concluded that the computational framework is able to simulate mode I interlaminar damage propagation and delamination migration in multidirectional laminates, providing a sound tool to better understand the conditions behind interlaminar crack migration.
UR - https://hdl.handle.net/1959.7/uws:76598
U2 - 10.1016/j.compstruct.2019.04.050
DO - 10.1016/j.compstruct.2019.04.050
M3 - Article
SN - 0263-8223
VL - 220
SP - 827
EP - 841
JO - Composite Structures
JF - Composite Structures
ER -