FATIGUE CRACK GROWTH OF STAINLESS STEEL FIBER REINFORCED ALUMINUM COMPOSITES

Document Type : Original Article

Authors

1 Research Assistant, Dpt. of Mechanical Eng., Selcuk University, Konya, Turkey.

2 Professor, Dpt. of Mechanical Eng., Selcuk University, Konya, Turkey.

3 Assistant professor, Kadinhani Faik Icil Vocational School, Selcuk University, Konya, Turkey.

4 Assistant professor, Dpt. of Mechanical Eng., Selcuk University, Konya, Turkey.

Abstract

ABSTRACT
In this study, fracture behavior of stainless steel/aluminum laminated composites with
middle through thickness crack under fatigue loading, was investigated. The composite
material, which has unidirectional continuous AISI 304 stainless steel as fibers and Al
2024 as matrix, was produced by using diffusion bonding. The fatigue tests were
conducted under agreement with the ASTM E647 standard. The crack initiation,
damage behavior, fatigue crack-growth rate (da/dN), stress intensity factor (ΔK), strain
energy release rate (ΔG) and fracture toughness ( IC K ) were determined. Moreover, ΔG
value was obtained by using Linear Elastic Fracture Mechanics (LEFM) and compliance
methods and the results were compared with each other. Also, da/dN-ΔK and da/dN-
ΔG were plotted for determining fracture behavior under fatigue loading of the
composite material.

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