Analysis of delamination propagation in open-hole GFRP composite under ۳ point-bending fatigue loading

The most common method of joining composites is using screws and bolts, which requires creating holes in the composite material. However, the stress concentration caused by the hole formation can make the material more susceptible to failure, particularly through delamination growth. This study investigates the initiation and propagation of damage in open-hole glass fiber-reinforced polymer (GFRP) composites under ۳-point bending fatigue. Continuum damage model (CDM) and the cohesive zone model (CZM) in conjunction with the UMAT subroutine (User-defined material behavior) used to simulate delamination around the hole, resulting in a reliable error percentage in ABAQUS software. Also, the decrease in stiffness under bending fatigue loading was investigated by examining the effects of delamination on mechanical properties.

کلیدواژه ها:

CZM ، CDM ، ۳-point bending fatigue ، Hashin criteria