Zastosowanie metody spadku potencjału do badań rozwoju pęknięć półeliptycznych

• Autorzy: Śnieżek L. , Mierzyński J. , Torzewski J.

Warianty tytułu

EN

The electric potential method as applied to examine semi-elliptic cracs

• Konferencja: Badania Eksperymentalne w Mechanice Ciała Stałego (22; Sympozjum Mechaniki Eksperymentalnej Ciała Stałego; 18-21.10.2006; Jachranka, Poland)
• Języki publikacji: PL

Abstrakty

EN

The paper deals with practical application of the electric potential difference procedure (EPD) in order to record the changes of the front shape of an elliptic crack extending in the specimens under cyclic variable amplitude tension. The material used was the austenitic steel which usualy utilizes the pipeline structure construction. Load spectrum performs the transformed exploative stress amplitudes acted on the pipeline wall. The calibration of the measure system which is enabled for continuouns recording of the elliptic semi-axes was made by means either of optical or dyeing methods. Additionaly, the crack propagation patters were applied in order o measure surface rack length. The obtained results confirm the capacity of the EPD method which can be used to record the semi-elliptic crack growth. This mentioned method improves significantly the analysis of the crack propagation.

Słowa kluczowe

PL

badania materiałów; metody optyczne; pęknięcia

EN

materials testing; optical methods; semi-eliptic cracs

• Wydawca: Oficyna Wydawnicza Politechniki Warszawskiej
• Czasopismo: Prace Naukowe Politechniki Warszawskiej. Mechanika
• Rocznik: 2007
• Tom: z. 217
• Strony: 127--132
• Opis fizyczny: Bibliogr. 8 poz., schem., rys., wykr.

Twórcy

autor

Śnieżek L.

autor

Mierzyński J.

autor

Torzewski J.

• Wojskowa Akademia Techniczna Warszawa,

Bibliografia

• [1] Werner K., Pomiary pęknięć i odkształceń, WPK Jacka Skalmierskiego, Katowice 2003, ss. 128-132.
• [2] Standard Test Method for Measurement of Fatigue Crack Growth Rates, ASTM E 647-95a.
• [3] Metoda badania prędkości wzrostu pęknięcia zmęczeniowego przy stałej amplitudzie obciążenia, PN-84/H-04333.
• [4] McFadyen N. B., Bell R., Vosikovsky O., Fatigue crack growth of semielliptical surface cracks, International Journal of Fatigue, Vol. 12, 1990, pp. 43-50.
• [5] Dover W. D., Collin R., Michael D. M., The use of AC-field measurements for crack detection and sizing in air and underwater, Transactions of the Royal Society, Vol. 320, London 1986, pp. 217-283.
• [6] Hall R. F., Powell B. E., The growth of corner cracks by fatigue. International Journal of Fatigue, Vol. 5, 1997, pp. 429-435.
• [7] Song P. S., Sheu B. C., Shieh Y. L., Prediction of semi-elliptical surface crack growth in 2024-T4 aluminium alloy, Pressure Vessels and Piping, Vol.79, 2002, pp. 273-278.
• [8] Biernacki Z., Werner K., The investigation of fatigue cracks in higher strength steels by using system with the magnetic comparator. International Conference “MECHATRONICS 2000, Vol. 2, Warszawa 2000, pp. 431-434.