A novel approach to reconstruct residual stress fields induced by surface treatments in arbitrary 3D geometries using the eigenstrain method

Cai, Shupeng; Zhang, Yongkang

doi:10.1016/j.ijsolstr.2021.111372

Cited by 5 publications

(4 citation statements)

References 47 publications

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“…To model both axial and circumferential residual stresses simultaneously, the eigenstrain tensor is introduced as a pseudo-thermal strain tensor, which can be obtained through the coefficient of thermal expansion tensor α th and the temperature change ΔT. 35 For uniform materials, it is usually assumed that residual stresses only vary in the depth direction normal to the treated surface. 36 Therefore, the eigenstrain can be calculated by the simplified equation:…”

Section: Microstructure Instantiationsmentioning

confidence: 99%

“…The eigenstrain method is used to assign residual stress to SRVE. The permanent inelastic strain that induces the incompatibility and residual stress field within the solid is called “eigenstrain.” 35 By using the residual stress obtained from experiments to fit and calculate the eigenstrain field, the reconstruction of the residual stress field in the model can be completed. However, researchers usually assume that there is an equibiaxial intrinsic strain distribution on a plane tangent to the treated surface, 19,21 which contradicts the experimental results in this paper.…”

Section: Microstructure Modeling Including Surface Integrity Characte...mentioning

confidence: 99%

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A crystal plastic finite element model for the effect of surface integrity on multiaxial fatigue life after multistage machining processes

Liang,

Jiao,

Yan

et al. 2024

Fatigue Fract Eng Mat Struct

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Surface integrity influences the material fatigue performance significantly, but most micromechanical models based on crystal plasticity only consider the microstructure of the matrix. In this paper, a crystal plastic finite element modeling method was proposed, which simultaneously considered surface roughness, residual stress, and gradual microstructure. It was verified through multiaxial fatigue experiments of materials processed by different multistage machining processes. The results show that larger axial residual compressive stress and smaller grain size can lead to higher multiaxial fatigue life. The existence of residual compressive stress causes the location of material crack initiation to decrease from the surface layer to the subsurface layer. The proposed model can predict the multiaxial fatigue life of materials within a 50% error band.

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Section: Microstructure Instantiationsmentioning

confidence: 99%

Section: Microstructure Modeling Including Surface Integrity Characte...mentioning

confidence: 99%

A crystal plastic finite element model for the effect of surface integrity on multiaxial fatigue life after multistage machining processes

Liang,

Jiao,

Yan

et al. 2024

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

show abstract

“…[36][37][38] The advances in the full-field eigenstrain reconstruction [34,35] let further actions to be taken for the reconstruction of full-field distribution of residual stresses in surface-treated arbitrary geometries. [39] Another iterative approach was presented to reconstruct full-field residual stresses formed due to the shot peening process using numerical experiments. [40] The idea of combining evolutionary algorithms with eigenstrain theory in a fuzzy finite element model [36] was also applied to a more complex weld form for full-field reconstruction of residual stresses.…”

Section: Introductionmentioning

confidence: 99%

Voxel‐Based Full‐Field Eigenstrain Reconstruction of Residual Stresses

Uzun

Korsunsky

2023

Adv Eng Mater

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Inverse eigenstrain (inherent strain) analysis methods are shown to be effective for the reconstruction of residual stresses in plane eigenstrain problems (continuously processed bodies) while conversely residual stress reconstruction in discontinuously processed bodies is extremely challenging and necessitates the use of complex regularizing assumptions. Herein, a new generic inverse eigenstrain method suitable for the reconstruction of residual stresses along with residual elastic strains and displacements in discontinuously processed bodies is introduced. The proposed method uses the superposition of eigenstrain radial basis functions together with a set of limited experimental data for model‐free (unconstrained) determination of unknown eigenstrain fields. This approach eliminates the limitations introduced by global basis functions such as polynomials. The novel point of this method is the ability to account for all six components of strain in an isotropic body without using regularizing assumptions. By lifting complex guiding formulation, the fidelity of full‐field eigenstrain reconstruction becomes directly related to the quality of experimental data and proper discretisation of the model domain. The FEniCS implementation has been validated using the experimental data of pointwise high‐energy synchrotron X‐ray diffraction measurements from a bent titanium alloy bar. A hybrid high throughput computing approach is also introduced for effective parallel computing.

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“…Cai et al [10] proposed a new method to reconstruct the residual stress field after surface treatment of arbitrary three-dimensional geometric structures based on the eigenstrain method of bicubic spline interpolation surface and finite element. Wang et al [11] proposed a method to construct the complete state of residual stress inside a solid through the measured surface residual stress, and reconstructed the initial stress field of the beam model with this method.…”

Section: Introductionmentioning

confidence: 99%

A novel genetic-based residual stress and deformation prediction method for the coupled machining process of connecting rod

Zhou¹,

Peng

Li³

et al. 2023

Preprint

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Residual stress is the main factor that causes the deformation of connecting rod during its coupled machining process. Thus, it is essential to predict the residual stress and deformation of the connecting rod before its machining. As the traditional independent analysis method is no longer suit to the coupled machining process, a novel genetic-based method is processed. Firstly, the genetic mechanism of residual stress field and deformation field was established to realize the effective correlation of multiple machining process simulation models. Secondly, a milling process was established based on the birth and death element method, which converts complex milling processes into dynamic loading of milling forces and the death of elements of the FEM model. It realizes the coupling of initial residual stress (IRS) and machining induced residual stress (MIRS). Then, a multi-process simulation model of heat treatment, cutting off, and milling of connecting rod is established, which can reveal the evolution law of residual stress field under multi-process coupling of connecting rod, the coupling mechanism between IRS and MIRS, and the deformation response law of big hole cylinder of connecting rod. The proposed method will have great significance to the deformation control of connecting rod.

show abstract

A novel approach to reconstruct residual stress fields induced by surface treatments in arbitrary 3D geometries using the eigenstrain method

Cited by 5 publications

References 47 publications

A crystal plastic finite element model for the effect of surface integrity on multiaxial fatigue life after multistage machining processes

A crystal plastic finite element model for the effect of surface integrity on multiaxial fatigue life after multistage machining processes

Voxel‐Based Full‐Field Eigenstrain Reconstruction of Residual Stresses

A novel genetic-based residual stress and deformation prediction method for the coupled machining process of connecting rod

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