TY - JOUR
T1 - Stiffness tailoring of elliptical composite cylinders for axial buckling performance
AU - Rouhi, Mohammad
AU - Ghayoor, Hossein
AU - Van Hoa, Suong
AU - Hojjati, Mehdi
AU - Weaver, Paul
PY - 2016/8/15
Y1 - 2016/8/15
N2 - Automated fiber placement (AFP) machines have made it possible to tailor the material stiffness properties in a laminated composite structure by fiber steering. The so-called variable stiffness (VS) laminate can be designed to improve the structural performance of a composite component. Herein, using a metamodeling based design optimization (MBDO) method, elliptical composite cylinders with VS laminate are designed and optimized for maximum axial buckling capacity. The effect of cross-sectional aspect ratio of the elliptical cylinders on the potential improvement of the buckling capacity is also investigated. As the baseline for comparison, for each cross-sectional aspect ratio, the buckling capacity of elliptical cylinders with quasi-isotropic (QI) and optimum constant stiffness (CS) laminates are also calculated. It is found that the buckling capacity of an elliptical composite cylinder can be improved by fiber steering up to 118% compared with its best CS counterpart.
AB - Automated fiber placement (AFP) machines have made it possible to tailor the material stiffness properties in a laminated composite structure by fiber steering. The so-called variable stiffness (VS) laminate can be designed to improve the structural performance of a composite component. Herein, using a metamodeling based design optimization (MBDO) method, elliptical composite cylinders with VS laminate are designed and optimized for maximum axial buckling capacity. The effect of cross-sectional aspect ratio of the elliptical cylinders on the potential improvement of the buckling capacity is also investigated. As the baseline for comparison, for each cross-sectional aspect ratio, the buckling capacity of elliptical cylinders with quasi-isotropic (QI) and optimum constant stiffness (CS) laminates are also calculated. It is found that the buckling capacity of an elliptical composite cylinder can be improved by fiber steering up to 118% compared with its best CS counterpart.
KW - Stiffness tailoring
KW - Variable stiffness
KW - Elliptical composite cylinder
KW - Buckling
KW - Design optimization
UR - http://www.scopus.com/inward/record.url?scp=84966339513&partnerID=8YFLogxK
U2 - 10.1016/j.compstruct.2016.05.007
DO - 10.1016/j.compstruct.2016.05.007
M3 - Article (Academic Journal)
AN - SCOPUS:84966339513
SN - 0263-8223
VL - 150
SP - 115
EP - 123
JO - Composite Structures
JF - Composite Structures
ER -