Finite Element Method Investigation of the Effect of Cold Expansion Process on Fatigue Crack Growth in 6082 Aluminum Alloy

Aid, A.; Semari, Zahar; Benguediab, M.

doi:10.4236/mnsms.2014.41005

Cited by 1 publication

(1 citation statement)

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“…Aid A., Semari Z., and Benguediab M. proposed a method for studying the effect of the radial interference value during hole cold expansion on the growth rate of a fatigue crack in a strip of the 6082A T6 aluminum alloy [18]. The method involved carrying out numerical simulations and a full-scale experiment with subsequent verification of the results.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Effectiveness of Combined Surface Treatment Methods for Structural Parts with Holes to Enhance Their Fatigue Life

Grebenikov,

Humennyi,

Svitlychnyi

et al. 2024

Computation

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The typical and most widespread stress concentrators in the lower wing panels of aircraft are the drain holes located on the stringer vertical ribs. These are prime sources for the initiation and development of fatigue cracks, which lead to early failure of the wing structure. Therefore, improving fatigue life in these critical areas is one of the significant issues for research. Two combined methods of surface plastic treatment in the location around drain holes are discussed in this paper. Using the finite element method and ANSYS software, we created a finite element model and obtained nonlinear solution results in the case of tension in a plate with three holes. In addition, the development of residual stress due to the surface plastic treatment of the hole-adjacent areas was taken into account. In this paper, it is shown that after surface treatment of the corresponding areas of the holes, residual stress, which exceeds the yield stress for the plate material, is induced. When combined with alternative tensile stress, these reduce the amplitude of the local stresses, thus increasing the number of stress cycles before failure. The benefits of this technology were confirmed by fatigue test results, which include the fatigue failure types of the plates. Graphs showing the impact of applicable surface treatment combined methods on the number of cycles to failure were also plotted.

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Section: Introductionmentioning

confidence: 99%