Reliability of Non Destructive Techniques Based on A Statistical Simulation Approach

摘要

Structure reliability guaranty requires initial evaluation of non destructive testing methods. The concept of Probability of Detection (POD) is generally used to obtain performances and reliability of testing operations quantitatively. Such probabilistic approaches take into account the uncertainties that appear during inspections and that are responsible for the output variability. Usually, the determination of the POD curve requires a costly and time consuming process that is based on statistical analysis of inspection data obtained during dedicated round robin programs. That is why cost reduction of POD campaigns is a major issue nowadays. A new trend is to apply simulation in the context of probabilistic approaches in order to replace some of the experimental data required to determine the POD with simulation results. This paper describes such methodologies that were adopted and implemented in the software CIVA. Applications of the methodology to Ultrasonics and Electromagnetic inspections techniques are also described for different type of materials (Forged, Welds, Cast stainless steel,...)