Method for estimating porosity of e.g. composite material part of aircraft, involves utilizing joint ultrasonic characterization process for estimating value of porosity degree and thickness of material part

摘要

The method involves utilizing a joint ultrasonic characterization process for estimating value of porosity degree and thickness of a material part. Mean velocity of an ultrasonic wave generated by an ultrasonic generator is estimated (210) using the porosity degree and thickness of a material part, and new thickness is estimated (220) from the measured mean velocity. A new porosity degree is determined using the estimated (230) new thickness, and difference between the new thickness and the estimated thickness and the new degree of porosity and the estimated degree is calculated (240).