Effect of cold expansion on fatigue performance of open holes

Liu, J.; Shao, Xiao; Liu, Y.S.; Yue, Zhufeng

doi:10.1016/j.msea.2007.05.034

Cited by 65 publications

(28 citation statements)

References 9 publications

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“…From this process the residual stresses along the plate front and back edges decreases with some rise in the tensile stresses away from the hole edge. As for the increase in fatigue amelioration of hole with cold expansion process, Liu et al [32] reported that, the fatigue life was improved by a factor from 1.5 to 5.0 witch depend on the expansion level. Also, in work of Semari et al [6], the effects of residuals stresses induced by ball in cold expansion process on fatigue life of 6082 T6 are given by experimentally and numerically investigation (3D finite element analysis).…”

Section: Introductionmentioning

confidence: 99%

Effect of cold expansion on improving of fatigue initiation life in Aluminium alloy

Habiri

Benachour

2018

Frattura Ed Integrità Strutturale

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In this paper, numerical investigation was carried out to quantify the effect of the cold expansion on fatigue crack initiation in Aluminium alloy. The improvement in fatigue initiation life of specimen after the cold expansion process was investigated with the drilled hole of 2024 T351 Aluminium alloy plate. The applied degree of expansion (DCE%=100 (Dd)/d) is 4.6% where the effect of friction (µ=0.2) is considered. Residual stress field is determined using 3D Finite Element Analysis and shows the presence of compressive residual stress around the hole. The results showed a high compressive residual stress near the hole in exit face of the hole and at middle of the plate thickness around the hole. Local strain approach is applied in evaluation of fatigue initiation lives under Afgrow environment code. Fatigue initiation lives are improved by the presence of the compressive residual stresses comparatively to the drilled hole without of compressive residual stresses. Also, the fatigue initiation lives are increased with the increase in stress ratio for drilled hole and expanded hole Citation: El Habiri, Med., Benachour, M., Benachour, N., Effect of cold expansion on improving of fatigue initiation life of Aluminium alloy, Frattura ed Integrità Strutturale, 46 (2018) 34-44.

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Section: Introductionmentioning

confidence: 99%

Effect of cold expansion on improving of fatigue initiation life in Aluminium alloy

Habiri

Benachour

2018

Frattura Ed Integrità Strutturale

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“…Cold expansion can be achieved by different procedures. A common process is to insert an oversized tool from one side of a holed plate and extract it from the opposite side [10,11]. In this paper the split-sleeve cold expansion process was used for cold expansion and was carried out after bonding the strap onto the metal substrate.…”

Section: Introductionmentioning

confidence: 99%

Effect of Thermal Residual Stresses on Bonded Structures Containing Cold Expanded and Bolted Holes

Syed¹,

Fitzpatrick

Moffatt

2014

AMR

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Abstract. The primary focus of this investigation is to determine the distribution of thermal residual stresses that result during composite bonding processes, and the effect on stresses generated during the subsequent cold expansion of holes. Residual stress measurements were carried out using neutron diffraction techniques. Results show that the cold expansion process resulted in radial compressive stresses 3-4 mm from the edge of the hole and there was no significant effect of thermal residual stresses from the bonding process on the cold expansion and bolted stresses.

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“…Pasta [13] studied the fatigue crack propagation from a coldworked hole by direct measurement of the a-N curve. Liu et al [14] reported that, depending on the expansion level, the cold expansion process can result in an improvement of fatigue life by a factor of 1.5-5.0.…”

Section: Introductionmentioning

confidence: 99%

Effect of edge distance ratio on residual stresses induced by cold expansion and fatigue life of TC4 plates

Liu

Yang

et al. 2013

Engineering Fracture Mechanics

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Effect of cold expansion on fatigue performance of open holes

Cited by 65 publications

References 9 publications

Effect of cold expansion on improving of fatigue initiation life in Aluminium alloy

Effect of cold expansion on improving of fatigue initiation life in Aluminium alloy

Effect of Thermal Residual Stresses on Bonded Structures Containing Cold Expanded and Bolted Holes

Effect of edge distance ratio on residual stresses induced by cold expansion and fatigue life of TC4 plates

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