TY - JOUR
T1 - Effects of circular cutouts on mechanical behaviors of carbon fiber reinforced lattice-core sandwich cylinder
AU - Sun, Fangfang
AU - Wang, Peng
AU - Li, Wanxin
AU - Fan, Hualin
AU - Fang, Daining
N1 - Publisher Copyright:
© 2017 Elsevier Ltd
PY - 2017/9
Y1 - 2017/9
N2 - Experiments were carried out to reveal cutout effects on stress concentrations, failure styles, natural frequencies and mode shapes of conical carbon fiber reinforced composite (CFRC) lattice-core sandwich cylinder (LSC). The LSC exhibits ductile failure induced by skin fractures initiating from the cutout and propagating circumferentially. In the test, the strains concentrate at the cutouts. This is consistent with the initiation of the cracks. Free vibration test reveals the cutout cylinder has identical vibration modes with cylinder without cutouts, but the higher order modes are more complex. Numerical simulations were performed to supplement more information of the cutout effects. The cutout has little influence to the free vibration performances. The stress distribution differs from uniform laminated shells. Cutout has obvious effect to the stress concentration factor (SCF), which reaches to 7 for the skin. Appropriate strengthening can reduce the SCF by 40%.
AB - Experiments were carried out to reveal cutout effects on stress concentrations, failure styles, natural frequencies and mode shapes of conical carbon fiber reinforced composite (CFRC) lattice-core sandwich cylinder (LSC). The LSC exhibits ductile failure induced by skin fractures initiating from the cutout and propagating circumferentially. In the test, the strains concentrate at the cutouts. This is consistent with the initiation of the cracks. Free vibration test reveals the cutout cylinder has identical vibration modes with cylinder without cutouts, but the higher order modes are more complex. Numerical simulations were performed to supplement more information of the cutout effects. The cutout has little influence to the free vibration performances. The stress distribution differs from uniform laminated shells. Cutout has obvious effect to the stress concentration factor (SCF), which reaches to 7 for the skin. Appropriate strengthening can reduce the SCF by 40%.
KW - A. Sandwich structures
KW - B. Mechanical properties
KW - B. Stress concentrations
UR - http://www.scopus.com/inward/record.url?scp=85020048693&partnerID=8YFLogxK
U2 - 10.1016/j.compositesa.2017.05.029
DO - 10.1016/j.compositesa.2017.05.029
M3 - Article
AN - SCOPUS:85020048693
SN - 1359-835X
VL - 100
SP - 313
EP - 323
JO - Composites Part A: Applied Science and Manufacturing
JF - Composites Part A: Applied Science and Manufacturing
ER -