1. Investigation of Contact Acoustic Nonlinearities on Metal and Composite Structures via Intensity Based Health Monitoring Systems Open Access Author: Romano, Peter Quinn Title: Investigation of Contact Acoustic Nonlinearities on Metal and Composite Structures via Intensity Based Health Monitoring Systems Graduate Program: Aerospace Engineering Keywords: Health MonitoringStructural DynamicsCANContact Acoustic NonlinearityStructural AcousticsVibrationDynamics File: Download PSU_Thesis_PQR_revFinal.pdf Committee Members: Stephen Clarke Conlon, Thesis Advisor/Co-AdvisorStephen Clarke Conlon, Thesis Advisor/Co-AdvisorEdward Smith, Thesis Advisor/Co-Advisor