The co-curing of embedded damping composites is achieved at low temperatures, and the co-cured laminates possessed superior interlayer bonding property. An orthogonal test is implemented to develop a viscoelastic material ingredient capable of co-curing with fiberglass/phenolic resin prepreg at 80℃, obtaining excellent mechanical properties. The strong polar tetrahydrofuran is employed as a solvent to dissolve the viscoelastic damping material into damping paste, then the prepreg with damping film is manufactured using the brushing coating process. Finally, based on the scheduled layup sequence, the embedded low-temperature co-cured composite specimens are prepared through the co-curing process. The curves of the damping and shear properties with respect to damping layer thickness were obtained through free decay test and interlaminar shear test. The experimental data indicated that the thicker the damping film, the larger the composite structure damping coefficient, and the lower the interlaminar shear stress.
ZHENG Changsheng
,
LIANG Sen
,
CHEN Jing
,
LIANG Hengliang
. Low-temperature co-cured high damping composites[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2019
, 40(8)
: 422721
-422721
.
DOI: 10.7527/S1000-6893.2018.22721
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