作者: M. Meo , G. Zumpano
DOI: 10.1016/J.COMPSTRUCT.2005.09.027
关键词:
摘要: Fragility of composite material to impact loading limits their application in aircraft structures. There is the need develop reliable monitoring devices capable localizing and assessing damage. At this aim, a new technique, non-linear elastic wave spectroscopy (NEWS), developed for geophysics applications, investigated presented paper. The NEWS damage detection based technique consists analysis spectrum signal acquired from structure under investigation excited by bi-harmonic signal. In pristine conditions, presents two picks at excitation frequencies. presence damages, starts behave non-linearly sidebands harmonics frequencies are generated. study, experimental findings on sandwich plate order understand capability detect damages.