Vibration-buckling tests on heated composite plates

This paper presents an experimental investigation on vibrations of heated composite plates leading to thermal buckling. The tests were performed considering two main goals: the application Vibration Correlation Technique for detection buckling in plates; and exploration frequency variations before after occurrence a mode jump post-buckling regime. Two test setups used. shared low expansion frame, while they differentiate type heating source mechanical boundary conditions. with layups [30/−30/5/−5]s [35/−35/10/−10]s tested. excited acoustically using loudspeaker, vibration frequencies monitored stored laser vibrometer. Buckling temperatures successfully detected Technique. Frequency changes, potentially related jumping, also detected.