TY - JOUR
T1 - Computational micromechanics of the effect of fibre misalignment on the longitudinal compression and shear properties of UD fibre-reinforced plastics
AU - Sebaey, T. A.
AU - Catalanotti, G.
AU - Lopes, C. S.
AU - O'Dowd, N.
N1 - Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2020/9/15
Y1 - 2020/9/15
N2 - In this paper, 3D representative volume elements (RVEs) of UD carbon/epoxy composites are generated, taking into consideration a realistic misalignment of the fibres. To construct the RVE, a 2D distribution of the fibre sections is considered and then extruded in the longitudinal direction. Experimental measurements to the misalignments are modelled by perturbing the positions of the control points defined on the centreline of each fibre, representing the fibre path as a Bézier curve. The individual fibres are considered as linear elastic orthotropic whereas, the matrix is modelled as isotropic using a damage-plasticity model. The fibre/matrix interface is modelled using a cohesive formulation law. The IM7/8552 material was simulated using three loading conditions: longitudinal compression, longitudinal shear, and transverse shear. The results show clear correlation between fibre misalignment and compression strength, and stiffness. For shear loading, no effect is recorded. Under the three loading conditions, the predicted material properties and damage propagation are in agreement with the data available in the literature.
AB - In this paper, 3D representative volume elements (RVEs) of UD carbon/epoxy composites are generated, taking into consideration a realistic misalignment of the fibres. To construct the RVE, a 2D distribution of the fibre sections is considered and then extruded in the longitudinal direction. Experimental measurements to the misalignments are modelled by perturbing the positions of the control points defined on the centreline of each fibre, representing the fibre path as a Bézier curve. The individual fibres are considered as linear elastic orthotropic whereas, the matrix is modelled as isotropic using a damage-plasticity model. The fibre/matrix interface is modelled using a cohesive formulation law. The IM7/8552 material was simulated using three loading conditions: longitudinal compression, longitudinal shear, and transverse shear. The results show clear correlation between fibre misalignment and compression strength, and stiffness. For shear loading, no effect is recorded. Under the three loading conditions, the predicted material properties and damage propagation are in agreement with the data available in the literature.
KW - 3D representative volume elements
KW - Fibre misalignment
KW - Finite element analysis
KW - Longitudinal compression
KW - Micromechanics
UR - http://www.scopus.com/inward/record.url?scp=85086452354&partnerID=8YFLogxK
U2 - 10.1016/j.compstruct.2020.112487
DO - 10.1016/j.compstruct.2020.112487
M3 - Article
AN - SCOPUS:85086452354
SN - 0263-8223
VL - 248
JO - Composite Structures
JF - Composite Structures
M1 - 112487
ER -