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Suitability of DIC and ESPI optical methods for monitoring fatigue damage development in X10CrMoVNb9-1 power engineering steel

Kopec M., Brodecki A., Kukla D., Kowalewski Z. L.

Archives of Civil and Mechanical Engineering

2021

Vol. 21, no. 4

542--554

The aim of this research was to compare the effectiveness of two different optical measurement techniques (digital image correlation-DIC and electronic speckle pattern interferometry-ESPI) during fatigue damage development monitoring in X10CrMoVNb9-1 (P91) power engineering steel for pipes. The specimens machined from the as-received pipe were subjected to fatigue loadings and monitored simultaneously using DIC and ESPI techniques. It was found that DIC technique, although characterised by lower resolution, was more effective than ESPI. DIC allows to monitor the fatigue behaviour of steel specimens and accurately indicate the area of potential failure even within the initial stage of fatigue damage development.

Computing Simulation of Dynamical Behavior of Rectangular thin Plates and its Comparison with Experimental Investigation Obtained by Holographic Interferometry

Rusnáková S., Slabeycius J., Koštial P., Bakošová D., Švecová Z., Vavro J.

Machine Dynamics Problems

2004

Vol. 28, No. 4

89-94

In this study, experimental investigation vibration behavior of square composite plate by electronic speckle pattern interferometry (ESPI) is employed. Resonant frequencies and corresponding mode shape are obtained experimentally using the present method. The numerical calculations by the finite element method (Cosmos) are performed and the results are compared with the experimental measurements. Good agreement is obtained for both results of resonant frequencies and mode shapes. Theory of plate vibrations allows us to determine Poisson's ratio v, Young's modulus E and shear modulus G from the measured resonant frequencies.