Title of the project: Examination of the fracture process with magnetic and electric-emission measuring technique
OTKA contract number: T030057
Duration: 48 month starting date (Starting date: 1999.)
OTKA funding: 3.000 kHUF (12 kEuro)
Project leader: Dr. Gyöngyvér B. Lenkey
Institute of Logistics and Production Systems
H-3519 Miskolctapolca Iglói u. 2.
Tel.: +36-46-560-118
Fax: +36-46-369-438
e-mail: lenkey@bzlogi.hu
Objectives:
The main aim of the project is to carry out a more detailed analysis of the magnetic and electric-emission signals, and to find a clear connection between the processes taking during fracture and the measured emission signals in the case of the most different materials. On the one part it means the analysis of the large number of measuring data accumulated in the last few years from this aspect, using modern signal processing and digital filtering techniques. On the other part we intend to compare the different measuring methods potentially suitable for determining the instant of crack initiation (strain gauge technique, potential drop measurement). Apart from this, with systematic analysing work and with the help of further tests we intend to clarify what kind of material parameters influence the emission signals and how they do it. The project lasts for 4 years. It is realised in co-operation with the specialists of the University of Miskolc.
The most important expected result of the project would be a more precise interpretation of the magnetic and electric-emission measurement techniques - which are considered as relatively new techniques even in international respect, and they are not yet widely used - and a more precise clarification of the connection of the measured signals with the material characteristics. These measurement procedures can be used in the determination of dynamic fracture mechanics characteristics of materials.