Orientation-Identified virtual fields method combined with moiré interferometry for mechanical characterization of single crystal Ni-based superalloys

Cao, Quankun; Li, Yangyang; Xie, Huimin

doi:10.1016/j.optlaseng.2019.105854

Cited by 9 publications

(3 citation statements)

References 20 publications

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“…where C ij (i, j = 1,2,4) are the three independent components of the stiffness matrix in the crystal coordinate system. For the in-plane strain and stress in the 1-2 plane, the constitutive relationships of the NBSCS can be represented by [37] σ 11…”

Section: D Moiré Phase Analysis Using the Sm Methodsmentioning

confidence: 99%

“…For the in‐plane strain and stress in the 1–2 plane, the constitutive relationships of the NBSCS can be represented by [ 37 ]

([], \begin{array}{c} σ_{11} \\ σ_{22} \\ σ_{12} \end{array}) goodbreak= ([], \begin{array}{c} Q_{11} & Q_{12} & 0 \\ Q_{12} & Q_{11} & 0 \\ 0 & 0 & Q_{66} \end{array}) ([], \begin{array}{c} ε_{11} \\ ε_{22} \\ γ_{12} \end{array}),

where σ ij ( i , j = 1, 2) are the stress components, ε 11 and ε 22 are the normal strain components, γ 12 is the engineering shear strain component and Q ij ( i , j = 1,2,6) are the in‐plane stiffness coefficients. Different from the isotropic constitutive, Q 66 is not equal to ( Q 11 ‐ Q 12 )/2 in Equation (7).…”

Section: Theorymentioning

confidence: 99%

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Identification of thermomechanical parameters based on the virtual fields method combined with the sampling moiré method

Xie

2022

Strain

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Thermomechanical parameters are important indicators for evaluating the mechanical properties of superalloys and generally include the coefficients of stiffness and thermal expansion at high temperatures. At present, there are few methods for simultaneously characterising the thermomechanical parameters of superalloys, especially single‐crystal superalloys. To satisfy the demand for simultaneously identifying the thermomechanical parameters of orthotropic superalloys, an optimised virtual fields method for decoupling the thermomechanical parameters was developed in this study by combining the self‐developed heat‐resistant grids and the sampling moiré method. First, several factors, including the oblique angle of the grids, image noise and thermomechanical coupling phenomena, were studied through numerical experiments to analyse their influences on the identification accuracy. Then, an optimised identification strategy was established. Finally, the thermomechanical parameters of Ni‐based polycrystalline and single‐crystal superalloys were successfully identified and comparatively studied. The identification results demonstrate that the proposed method is highly accurate and robust. This research will provide an effective way to accurately characterise the multiple parameters of superalloys at high temperatures.

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Section: D Moiré Phase Analysis Using the Sm Methodsmentioning

confidence: 99%

“…For the in‐plane strain and stress in the 1–2 plane, the constitutive relationships of the NBSCS can be represented by [ 37 ]

([], \begin{array}{c} σ_{11} \\ σ_{22} \\ σ_{12} \end{array}) goodbreak= ([], \begin{array}{c} Q_{11} & Q_{12} & 0 \\ Q_{12} & Q_{11} & 0 \\ 0 & 0 & Q_{66} \end{array}) ([], \begin{array}{c} ε_{11} \\ ε_{22} \\ γ_{12} \end{array}),

Section: Theorymentioning

confidence: 99%

Identification of thermomechanical parameters based on the virtual fields method combined with the sampling moiré method

Xie

2022

Strain

Self Cite

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“…The Virtual Fields Method is an identification technique which was introduced to process displacement or strain fields measured for instance by DIC Sutton et al (2009) or by other full-field measurement techniques such as the grid method Grédiac et al (2016) or interferometric moiré Cao et al (2020). It has been mainly proposed to measure parameters governing various types of constitutive equations Pierron and Grédiac (2012).…”

Section: The Virtual Fields Method: a Brief Remindermentioning

confidence: 99%

Applying the Virtual Fields Method to Measure During Milling the Through-Thickness Residual Stress Distribution in Aluminum-Alloy Sheet Material

Jovani

Blaysat²,

Chanal³

et al. 2022

Exp Mech

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HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

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Effects of rafting on the meso deformation and fracture behaviour of a Ni-based single crystal superalloy at room temperature: In-situ observation and simulation

Tan,

Yang,

Shi

et al. 2024

Sci. China Technol. Sci.

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Orientation-Identified virtual fields method combined with moiré interferometry for mechanical characterization of single crystal Ni-based superalloys

Cited by 9 publications

References 20 publications

Identification of thermomechanical parameters based on the virtual fields method combined with the sampling moiré method

Identification of thermomechanical parameters based on the virtual fields method combined with the sampling moiré method

Applying the Virtual Fields Method to Measure During Milling the Through-Thickness Residual Stress Distribution in Aluminum-Alloy Sheet Material

Effects of rafting on the meso deformation and fracture behaviour of a Ni-based single crystal superalloy at room temperature: In-situ observation and simulation

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