NDT mechanicky poškozených betonových vzorků metodou nelineární akustické spektroskopie

摘要

Current research and development of non-linear ultrasonic spectroscopy methods shows these methods to be very promising for material testing and defectoscopy in the near future. Our experiments focused on the testing of lightweight concrete specimens using the single-frequency excitation method. We studied the concrete specimens structure after having been stressed by a mechanical force. Measurements were realized before and after mechanical loading.