Elastic-Plastic Analysis of an Infinite Sheet Having a Circular Hole Under Pressure

Hsu, Y. C.; Forman, R. G.

doi:10.1115/1.3423579

Cited by 116 publications

(67 citation statements)

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“…This analytical solution, such as all other analytical models (Nadai, 1943;Hsu and Forman, 1975;Rich and Impellizzeri, 1977), does not provide the stress differences through the thickness. Guo's model, which is rather complex (Guo, 1993), represents fine the real residual stress distribution at mid-thickness without considering the split of the sleeve.…”

Section: Comparison With Analytical Theorymentioning

confidence: 99%

“…Analytical studies have determined the closed-form solution of the residual stress for considering the material's yield limit on unloading step (Guo, 1993;Nadai, 1943;Hsu and Forman, 1975;Rich and Impellizzeri, 1977). However, many solutions are based on two-dimensional approximations, and theories are not able to predict the through-thickness residual stress field.…”

Section: Introductionmentioning

confidence: 99%

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Finite-element simulation of residual stress induced by split-sleeve cold-expansion process of holes

Nigrelli

Pasta

2008

Journal of Materials Processing Technology

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This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research and education use, including for instruction at the authors institution and sharing with colleagues.Other uses, including reproduction and distribution, or selling or licensing copies, or posting to personal, institutional or third party websites are prohibited. A three-dimensional finite-element simulation was conducted for a split-sleeve coldexpansion process in order to determine the residual stress field around an expanded hole.The commercial FEA software DEFORM-3D TM , a Lagrangian implicit code designed for metal forming processes, was used to model the cold-expansion process of a fastener hole. The results show a through-thickness residual stress field in good agreement with the analytical solution developed by Guo. Moreover, the simulation has highlighted the effect of the split sleeve and the plate thickness on the residual stress field.

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Section: Comparison With Analytical Theorymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Finite-element simulation of residual stress induced by split-sleeve cold-expansion process of holes

Nigrelli

Pasta

2008

Journal of Materials Processing Technology

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“…The literature presents several representative theories to evaluate the residual stress field, and these analytical models are perhaps an example of the historical development of plasticity theory [3][4][5][6][7]. However, these solutions are based on assumptions that neglect the through-thickness changes of residual stresses along the hole bore.…”

Section: Introductionmentioning

confidence: 99%

On the Measurement and Prediction of the Out-of-Plane Displacement Surrounding Cold-Expanded Holes

D’Acquisto

Pasta

2010

Exp Mech

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Experimental measurements of the out-of-plane displacement surrounding cold-expanded holes in a 6082-T6 aluminum alloy were made with a 3D optical scanner using the technique of the encoded light-pattern projection in white light. The measured surface profiles have shown the thickness discontinuity along the hole edge due to the effect of the split in the sleeve. An analyticalnumerical solution of the out-of-plane displacement is presented based on existing analytical models. Thus, the results given by the analytical model were then compared with the experimental data and with a finite element (FE) model that simulates the cold-expansion process. The location of the elastic-plastic boundary was estimated as the point at which no change in thickness was observed; a good agreement was found in the comparison of measured, FE and analytical results. The measured surface profiles agreed with those predicted by the FE model and analytical solution. The proposed experimental approach can be used together with FE analysis for predicting the radial and circumferential residual stresses in cold-expanded hole. It is quite versatile and can also be used as quality-control technique in the manufacturing processes of cold-expanded holes.

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“…Extensive literature covers so many results of analytical, numerical and experimental methods [1,2,7,[11][12][13][14][15][16]19,[25][26][27][28][29][30][31][32][33][34][36][37][38][39][40][41][42][43][44][45][46][47][48][55][56][57][58][59], which they do not entirely match each other.…”

Section: Introductionmentioning

confidence: 99%

“…Mathematical derivations mostly employ closed form solutions adopting already existing solutions of thin walled [11][12][13][14][15] and thick walled [16][17][18][19][20] tubes subjected to an internal pressure. Further, strain hardening behavior [13,14,[16][17][18], elastic unloading [11] and non linear elastic-plastic behavior on both loading and unloading [15,20] of the material after cold expansion were considered. Serious deficiencies of the mathematical models mostly arise from the limitations of small deformation theory for strains (5%).…”

Section: Introductionmentioning

confidence: 99%

Experimental assessment of the redistribution of 3-D residual stresses during early fatigue at split-sleeve cold expanded reamed A/C fastener holes

Özdemir

2017

Scientia Iranica

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Abstract.Cold expansion is an effective technique of inducing favorable compressive residual stresses around fastener holes essentially vital for improving fatigue performances of aircrafts. The benefit is caused by the magnitude and distribution of the compressive stress field. Stress gradients are entirely contingent on type of the cold expansion, local geometry of the hole and characteristics of the metallic structure. During cyclic loading however, initial residual stresses do not remain stable. In the present work, specimens with 4% split-sleeve cold expanded and reamed holes were cycled at the fatigue limit for short periods. Recent method of Combined Step Drilling-Fourier Series Solution 'ATÖzdemir Method' was employed to appraise the continual redistributions of residual hoop stresses at the side of the hole subjected to cyclic load. Some results were compared with that of diffraction methods and Artificial Neural Network (ANN) modeling where, close similarities in stress distributions were confirmed. It is clear that during early fatigue, material nearby the hole is dynamically hardening; in response compressive residual stresses along the bore are gradually increasing till the onset of cracking. Short fatigue cracks mostly initiate from the mandrel entrance side, where subsequently residual hoop stresses begin to relax considerably.

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Elastic-Plastic Analysis of an Infinite Sheet Having a Circular Hole Under Pressure

Cited by 116 publications

References 0 publications

Finite-element simulation of residual stress induced by split-sleeve cold-expansion process of holes

Finite-element simulation of residual stress induced by split-sleeve cold-expansion process of holes

On the Measurement and Prediction of the Out-of-Plane Displacement Surrounding Cold-Expanded Holes

Experimental assessment of the redistribution of 3-D residual stresses during early fatigue at split-sleeve cold expanded reamed A/C fastener holes

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