A customized electrical potential difference method for in situ monitoring of propagating cracks using a stochastic algorithm

Evangelos Skrinis,Antonios Tsolakis,Christos Kalligeros,Vasilios Spitas,S Pantelakis,G Lampeas,K Tserpes

doi:10.1051/matecconf/202134902018

Abstract

In this paper, a modified direct current potential drop (DCPD) method for real-time measurement of the length, the inclination and the position of cracks is presented. Based on the proposed configuration, it is possible to process the data acquired by continuously measuring the change in the electrical resistance (potential drop) between specific points on the specimen in real time and correlate them with the propagation of the crack and thus identifying its crucial characteristics. Furthermore, many aspects that affect the electromagnetic field inside materials have been identified. In that way the influence of unwanted factors can be significantly reduced which has led to a better understanding of the relation between the implemented voltage values and the fracture itself. Therefore, conclusions are drawn about the structural integrity of any given specimen through a risk assessment after the crack characteristics have been calculated. In order to achieve this, a variety of techniques were implemented including the development of a stochastic algorithm along with a customized experimental layout so as to accomplish high accuracy for the prediction model as well as robustness towards other influencing parameters such as temperature and humidity.

Highlights

Every kind of structure is designed in a way that it fulfills its assigned purpose but it allows the prediction of the manner and the time of its failure
Https://doi.org/10.10 51/matecconf /202134902018 has developed many theories and methods that can be used as a prediction tool for the creation and the propagation of cracks inside any material
The Direct Current Potential Drop (DCPD) method will be analysed as a viable option for the real-time assessment of the structural integrity of electrically conductive laminates

Summary

Introduction

Every kind of structure is designed in a way that it fulfills its assigned purpose but it allows the prediction of the manner and the time of its failure. The Direct Current Potential Drop (DCPD) method will be analysed as a viable option for the real-time assessment of the structural integrity of electrically conductive laminates. These thin surface structures have a vital role in various fields, such as aerospace and naval engineering and as a result the continuously monitoring of their health against the existence and the propagation of cracks has been the centre of many studies [1,2,3]

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