Some Remarks on the Crack Growth Analysis in Structural Components under Service Loading

• Autorzy: Grabowski P. , Jankowiak A.
• Języki publikacji: EN

Abstrakty

EN

Structural components of construction machinery and open-pit machines often contain cracks or crack-like defects initiated at notches under service cycling loading. Those cracks can decide on the process of material destruction. In order to determine the time spent on the stable fatigue growth of such cracks, the crack growth analysis needs to be carried out. One of the most important issues in the crack growth analysis is acquisition of straining history and preparation of its spectrum for fatigue calculations. However, durability forecasts may substantially differ one from another, depending on the type of applied assumptions and simplifications (i.e. calculations in the loading blocks and their sequence or taking into account the mean stress). The paper presents the selected aspects of the fatigue crack growth analysis carried out with the use of the service loading acquired on the real open-pit machine - KWK 910 excavator.

Słowa kluczowe

EN

fatigue fracture; weight function; crack growth analysis

• Wydawca: Oficyna Wydawnicza Politechniki Warszawskiej
• Czasopismo: Machine Dynamics Research
• Rocznik: 2014
• Tom: Vol. 38, No. 2
• Strony: 17--26
• Opis fizyczny: Bibliogr. 4 poz., wykr.

Twórcy

autor

Grabowski P.

• Institute of Construction Machinery Engineering, Warsaw University of Technology

autor

Jankowiak A.

• Institute of Construction Machinery Engineering, Warsaw University of Technology

Bibliografia

• 1. Kowalczyk M., Sobczykiewicz W., 2011: Problemy realizacji projektu eksploatacyjnego - PEX konstrukcji nośnej maszyn górnictwa odkrywkowego w zakresie trwałości zmęczeniowej, czasopismo naukowo - techniczne „Górnictwo odkrywkowe”, 3-,4/2011, Poltegor - Instytut, Wroclaw (in Polish).
• 2. Glinka G., Reinhardt W., 2000.: Calculation of Stress Intensity Factors for Cracks of Complex Geometry and Subjected to Arbitrary Nonlinear Stress Fields. Fatigue and Fracture Mechanics, Vol.31, ASTM STP 1389, West Conshohocken, PA, 2000, ss. 348-370.
• 3. Jankowiak A., 2007: Analysis of Crack Growth Using the Two Dimensional Weight Function, PhD thesis, Warsaw, 2007 (in Polish).
• 4. Kocańda S., Szala J., 1997: Podstawy obliczeń zmęczeniowych, Wydawnictwa Naukowe PWN, Warszawa, 1997 (in Polish).