TY - JOUR
T1 - Interfacial fatigue debonding retardation in wrapped composite joints
T2 - Experimental and numerical study
AU - Feng, Weikang
AU - Pavlovic, Marko
AU - Koetsier, Mathieu
AU - Veljkovic, Milan
PY - 2023
Y1 - 2023
N2 - Debonding crack propagation at the composite-to-steel interface has been found to be an important failure mechanism for wrapped composite joints under static and fatigue loads. Friction at the interface behind the crack tip may deviate fatigue debonding of the joints from the linear-fracture-mechanics behaviour. This paper presents static and fatigue tests of axial wrapped composite joints. 3D DIC and optical fiber system is employed to monitor displacements and crack propagation. A finite element model is established and validated against static and fatigue test results, where friction is considered at the cracked interface. Through FE modelling, it is proved that the friction at the interface significantly reduce the strain energy release rate (SERR) at the crack tip, leading to retardations of crack growth and stiffness degradation. Parametric study is conducted finally to investigate the influence of friction coefficient, failure modes as well as Paris relationship parameters on the predicted fatigue behaviour of wrapped composite joints.
AB - Debonding crack propagation at the composite-to-steel interface has been found to be an important failure mechanism for wrapped composite joints under static and fatigue loads. Friction at the interface behind the crack tip may deviate fatigue debonding of the joints from the linear-fracture-mechanics behaviour. This paper presents static and fatigue tests of axial wrapped composite joints. 3D DIC and optical fiber system is employed to monitor displacements and crack propagation. A finite element model is established and validated against static and fatigue test results, where friction is considered at the cracked interface. Through FE modelling, it is proved that the friction at the interface significantly reduce the strain energy release rate (SERR) at the crack tip, leading to retardations of crack growth and stiffness degradation. Parametric study is conducted finally to investigate the influence of friction coefficient, failure modes as well as Paris relationship parameters on the predicted fatigue behaviour of wrapped composite joints.
KW - 3D DIC
KW - Fatigue crack propagation
KW - Finite element modelling
KW - Friction effect
KW - Optical fiber
KW - VCCT
UR - http://www.scopus.com/inward/record.url?scp=85160014163&partnerID=8YFLogxK
U2 - 10.1016/j.compstruct.2023.117146
DO - 10.1016/j.compstruct.2023.117146
M3 - Article
AN - SCOPUS:85160014163
SN - 0263-8223
VL - 319
JO - Composite Structures
JF - Composite Structures
M1 - 117146
ER -