TY - JOUR
T1 - Study of layup influences on the nonlinear behavior of composites by evaluation of ply stiffness reduction
AU - Taubert, Robin
AU - Mandel, Ulrich
AU - Hinterhölzl, Roland
PY - 2015/12/1
Y1 - 2015/12/1
N2 - The influence of the stacking sequence on the nonlinear response of composite laminates is investigated. It is shown that a layup dependency solely emerges from damage evolution mechanisms, whereas damage initiation and viscoelastic and viscoplastic strain accumulation are not affected by the layup. This is a result of a proposed procedure that enables the evaluation of the stiffness reduction on lamina level. The residual ply stiffness components can be determined at large deformations and for various laminates under in-plane loading conditions. A finite element study is utilized to characterize the properties of a ply containing discrete cracks. The relationship between transverse and shear stiffness reduction is derived from the FE results. This allows the combined determination of the residual lamina moduli from an axial laminate stiffness. The analysis approach is validated by angle-ply specimens with different layups.
AB - The influence of the stacking sequence on the nonlinear response of composite laminates is investigated. It is shown that a layup dependency solely emerges from damage evolution mechanisms, whereas damage initiation and viscoelastic and viscoplastic strain accumulation are not affected by the layup. This is a result of a proposed procedure that enables the evaluation of the stiffness reduction on lamina level. The residual ply stiffness components can be determined at large deformations and for various laminates under in-plane loading conditions. A finite element study is utilized to characterize the properties of a ply containing discrete cracks. The relationship between transverse and shear stiffness reduction is derived from the FE results. This allows the combined determination of the residual lamina moduli from an axial laminate stiffness. The analysis approach is validated by angle-ply specimens with different layups.
KW - A. Polymer-matrix composites (PMCs)
KW - B. Mechanical properties
KW - B. Transverse cracking
KW - C. Damage mechanics
UR - http://www.scopus.com/inward/record.url?scp=84943555224&partnerID=8YFLogxK
U2 - 10.1016/j.compositesa.2015.09.010
DO - 10.1016/j.compositesa.2015.09.010
M3 - Article
AN - SCOPUS:84943555224
SN - 1359-835X
VL - 79
SP - 63
EP - 73
JO - Composites Part A: Applied Science and Manufacturing
JF - Composites Part A: Applied Science and Manufacturing
ER -