TY - JOUR
T1 - A study on thermal buckling and mode jumping of metallic and composite plates
AU - Álvarez, Javier Gutiérrez
AU - Bisagni, Chiara
PY - 2021
Y1 - 2021
N2 - Composite plates in post-buckling regime can experience mode jumping in their buckling shape, suddenly increasing the number of half-waves. This phenomenon can be advantageous, be-cause the shape change could be used for local morphing or structural adaptability in future aerospace structures. A study of this phenomenon under heating is here presented, combining numerical and experimental techniques. At first, a set of parametric analysis was conducted to identify composite panels that present a mode jump when heated. Three plates were selected, one in alumi-num alloy 2024T3, and two in AS4/8552 composite material, with layup [30/−30/5/−5]s and [35/−35/10/−10]s. The plates were tested in a new test setup for thermal buckling based on low thermal expansion fixtures. The mode jumping was successfully obtained experimentally for both composite plates. Numerical simulations predicted the general trends for all plates, and the mode jumps for the composite plates.
AB - Composite plates in post-buckling regime can experience mode jumping in their buckling shape, suddenly increasing the number of half-waves. This phenomenon can be advantageous, be-cause the shape change could be used for local morphing or structural adaptability in future aerospace structures. A study of this phenomenon under heating is here presented, combining numerical and experimental techniques. At first, a set of parametric analysis was conducted to identify composite panels that present a mode jump when heated. Three plates were selected, one in alumi-num alloy 2024T3, and two in AS4/8552 composite material, with layup [30/−30/5/−5]s and [35/−35/10/−10]s. The plates were tested in a new test setup for thermal buckling based on low thermal expansion fixtures. The mode jumping was successfully obtained experimentally for both composite plates. Numerical simulations predicted the general trends for all plates, and the mode jumps for the composite plates.
KW - Aeronautical morphing application
KW - Experimental buckling
KW - Instability
KW - Post-buckling
KW - Shape change
KW - Thermal testing
UR - http://www.scopus.com/inward/record.url?scp=85102207259&partnerID=8YFLogxK
U2 - 10.3390/aerospace8020056
DO - 10.3390/aerospace8020056
M3 - Article
AN - SCOPUS:85102207259
VL - 8
SP - 1
EP - 17
JO - Aerospace — Open Access Aeronautics and Astronautics Journal
JF - Aerospace — Open Access Aeronautics and Astronautics Journal
SN - 2226-4310
IS - 2
M1 - 56
ER -