Deterministic Approach to Predicting the Fatigue Crack Growth in the 2024-T3 Aluminum Alloy Under Variable Amplitude Loading

• Autorzy: Kocańda D. , Torzewski J.

Identyfikatory

DOI

10.2478/v10164-010-0010-1

• Języki publikacji: EN

Abstrakty

EN

The paper presents the attempt to predict fatigue crack growth rate in a component subjected to variable amplitude loading containing overload-underload cycles. For this goal in a deterministic approach the modified Willenborg retardation model was applied. To provide experimental data the research into fatigue crack growth for 2024-T3 aluminum alloy sheet CCT specimens under LHL type block program loading with multiple overload-underload cycles was developed. The microfractographic analysis of fatigue fractures with the use of the transmission electron microscope (TEM) made it possible to trace the effect of block program loading on the crack growth rate. The knowledge of the affection of a particular overloadunderload cycle or a block of these cycles on crack rate on the basis of microfractographic analysis was utilized for assessing the equivalent loading for the LHL block program. The diagrams that presented the crack growth rate both on the surface and inside the aluminum alloy sheet was performed. The crack growth rate inside the sheet was estimated on the basis of the striation spacing analysis.

Słowa kluczowe

EN

aluminum alloy; fatigue crack growth rate; microfractographic analysis; Willenborg retardation model

• Wydawca: Wydawnictwa Naukowe Sieci Badawczej Łukasiewicz - Instytutu Lotnictwa
• Czasopismo: Fatigue of Aircraft Structures
• Rocznik: 2009
• Tom: Iss. 1
• Strony: 102--115
• Opis fizyczny: Bibliogr. 25 poz., rys., wykr., wzory

Twórcy

autor

Kocańda D.

• Military University of Technology Warsaw, Poland

autor

Torzewski J.

• Military University of Technology Warsaw, Poland

Bibliografia

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