Abstract
This paper presents the study of inherent acoustic nonlinearity found in fiber reinforced composites. Nonlinear elastic wave methods such as Nonlinear Resonant Ultrasound Spectroscopy (NRUS) and Nonlinear Wave Modulation Spectroscopy (NWMS) have been shown earlier to work successfully for nondestructive evaluation (NDE) of various materials. It was observed that applying these techniques to detect damage in composites becomes difficult due to baseline nonlinearity in intact samples. NRUS experiments were conducted on intact and damaged carbon fiber-epoxy samples. In the absence of defect, certain laminates exhibited a nonlinear characteristic which was defined as baseline nonlinearity. With increase in damage, nonlinearity increased beyond the baseline nonlinearity which highlights the importance of understanding the contributions to baseline nonlinearity. This study investigates the cause for the baseline nonlinearity and how it impacts the NDE of composites.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
