Criterion for crack initiation from notch located at the interface of bi-material structure

• Autorzy: Mieczkowski Grzegorz

Identyfikatory

DOI

10.17531/ein.2019.2.15

Warianty tytułu

PL

Kryterium pękania struktury bi-materiałowej z ostrym karbem usytuowanym na interfejsie

• Języki publikacji: EN PL

Abstrakty

EN

The fracture process of bi-material structure with the notch was analysed in this work. For fracture prediction, a criterion based on the Theory of Critical Distances was used. Under analysis were elements made of aluminium alloy and polymer combination (with a various structural notch-tip angle), which then were subjected to the three-point bending test. Values of critical loads resulting from the used hypothesis were compared with values obtained from the experiment. Validation of the selected criterion required defining a qualitative and quantitative description of singular stress fields present around the structural notch-tip area. Therefore, such solutions were obtained and methodology of their determining was discussed.

PL

W pracy przedstawiono wyniki badań dotyczących pękania struktury bi-materiałowej z karbem usytuowanym na interfejsie. Do prognozowania inicjacji procesu pękania zastosowano kryterium oparte na punktowej teorii krytycznych dystansów. Analizowano elementy wykonane ze stopu aluminium i polimerów (PC, PMMA), które poddane były trójpunktowemu zginaniu. Wartości obciążeń krytycznych wynikających z wykorzystanej hipotezy porównano z wartościami uzyskanymi z eksperymentu. Walidacja wybranego kryterium wymagała określania jakościowego i ilościowego opisu osobliwych pól naprężeń, występujących w okolicy wierzchołkowej karbu strukturalnego. W związku z tym, uzyskano takie rozwiązania i omówiono metodykę ich otrzymywania.

Słowa kluczowe

EN

crack initiation; interface fracture; bi-material; singular stress field; stress intensity factors

PL

inicjacja procesu pękania; bimateriał; osobliwe pole naprężeń; współczynniki intensywności naprężeń

• Wydawca: Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne
• Czasopismo: Eksploatacja i Niezawodność
• Rocznik: 2019
• Tom: Vol. 21, no. 2
• Strony: 301--310
• Opis fizyczny: Bibliogr. 38 poz., rys., tab.

Twórcy

autor

Mieczkowski Grzegorz

• Faculty of Mechanical Engineering Bialystok University of Technology ul. Wiejska 45C, Poland

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