Finite element analysis of the residual stress by cold expansion method under the influence of adjacent holes

Kim, Cheol; Kim, Dae‐Jin; Seok, Chang-Sung; Yang, Won-Ho

doi:10.1016/j.jmatprotec.2004.04.271

Cited by 40 publications

(15 citation statements)

References 4 publications

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“…28,29 However, in this study to implement interference fit of the hole, neither displacement nor force was prescribed at the pin/hole interface. 28,29 However, in this study to implement interference fit of the hole, neither displacement nor force was prescribed at the pin/hole interface.…”

Section: F E M O D E L Smentioning

confidence: 99%

Strain ratcheting and stress relaxation around interference‐fitted single‐holed plates under cyclic loading: experimental and numerical investigations

Chakherlou

Ajri

2012

Fatigue Fract Eng Mat Struct

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Longitudinal strain ratcheting and stress relaxation in interference‐fitted single‐holed plates were investigated both experimentally and numerically. In the experimental part single‐holed plates made from Al‐alloy 7075‐T6 were force‐fitted with oversized pins to create 1% and 2% nominal interference fit sizes. Then these plates (specimens) were instrumented with dynamic strain gauges in longitudinal direction around the hole to measure the strain during interference fit and strain ratcheting during subsequent cyclic loading. In the numerical part, 2D finite element code has been written to simulate the interference fit process and subsequent cyclic loading to obtain strains and stresses around the force fitted hole. To predict the strain ratcheting, Ohno–Wang kinematic hardening model was applied for simulation of stress/strain path. The strain ratcheting predicted from the finite element code and experimental test results were compared. The results showed that there is a good agreement between the measured and numerically evaluated strains, and the strain ratcheting is bigger for higher cyclic load level, but it is smaller for larger interference size.

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Section: F E M O D E L Smentioning

confidence: 99%

Strain ratcheting and stress relaxation around interference‐fitted single‐holed plates under cyclic loading: experimental and numerical investigations

Chakherlou

Ajri

2012

Fatigue Fract Eng Mat Struct

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“…The authors evaluated the effects of friction and prescribed boundary conditions and compared the model results to contour method measurements. Kim et al [19] used a simplified elastic-plastic finite element model to predict residual stresses resulting from CX of two adjacent holes, but did not provide comparison against measurement data. Boni et al [10] described a three-dimensional FE analysis for CX and compared model results to measurements (from Sachs method).…”

Section: Introductionmentioning

confidence: 99%

Residual Stress From Cold Expansion of Fastener Holes: Measurement, Eigenstrain, and Process Finite Element Modeling

Ribeiro

Hill

2017

Journal of Engineering Materials and Technology

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Cold expansion (CX) is a material processing technique that has been widely used in the aircraft industry to enhance fatigue life of structural components containing holes. CX introduces compressive hoop residual stresses that slow crack growth near the hole edge. The objective of this paper is to predict residual stresses arising from cold expansion using two different finite element (FE) approaches, and compare the results to measurement data obtained by the contour method. The paper considers single-hole, double-hole, and triple-hole configurations with three different edge margins. The first FE approach considers process modeling, and includes elasticplastic behavior, while the second approach is based on the eigenstrain method, and includes only elastic behavior. The results obtained from the FE models are in good agreement with one another, and with measurement data, especially close to the holes, and with respect to the effect of edge margin on the residual stress distributions. The distribution of the residual stress and equivalent plastic strain around the holes is also explored, and the results are discussed in detail. The eigenstrain method was found to be very useful, providing generally accurate predictions of residual stress.

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“…Effects of some parameters such as hole diameters and their distances, thickness of plate and level of cold expansion on residual stress distribution are studied. Based on experimental tests and numerical simulations, Kim et al [13] show the optimal results in case of adjacent holes. Their show that if the distance between holes is more than four times of the diameter of the hole, the residual stress around holes is not influenced by adjacent holes.…”

Section: Introductionmentioning

confidence: 99%

Effect of the indentation process on fatigue life of drilled specimens

et al. 2015

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Design and manufacture of mechanical elements are strongly influenced by the evaluation of the residual stresses due to their effects on the material strength. This paper presents numerical and experimental results performed on AW 6082-T6 aluminum alloy drilled specimens when the hole is created after a bilateral indentation process. The plastic deformation induced by the indenters creates a compressive residual stress field around the hole, which persists after the drilling operation. Several numerical analysis have been carried out in ANSYS APDL explicit solver for different indentation depths and hole diameters in order to evaluate the compressive circumferential stresses, optimal process parameters and relevant geometric features. Fatigue tests are performed in order to determine the cycles to failure and the corresponding Wöhler diagram

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Finite element analysis of the residual stress by cold expansion method under the influence of adjacent holes

Cited by 40 publications

References 4 publications

Strain ratcheting and stress relaxation around interference‐fitted single‐holed plates under cyclic loading: experimental and numerical investigations

Strain ratcheting and stress relaxation around interference‐fitted single‐holed plates under cyclic loading: experimental and numerical investigations

Residual Stress From Cold Expansion of Fastener Holes: Measurement, Eigenstrain, and Process Finite Element Modeling

Effect of the indentation process on fatigue life of drilled specimens

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