Determination of equi-biaxial residual stress and plastic properties in structural steel using instrumented indentation

Pham, Thai‐Hoan; Kim, Seung-Eock

doi:10.1016/j.msea.2017.01.109

Cited by 50 publications

(23 citation statements)

References 21 publications

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“…According to the inverse analysis method, /s E , y * n and α of the two metal materials SS400 and SM490 can be calculated. And then brought into equation (10), determine the magnitude of the residual stress, and finally to determine the positive and negative of the residual stress according to the load-displacement curve. If the curve is lower than the load-displacement curve without residual stress, the tensile residual stress in the material is positive.…”

Section: Inverse Analysis Methods For Verification Of Typical Metal Mamentioning

confidence: 99%

“…Through the above analysis, the dimensionless equation can be represented by the product form of two binary quadratic polynomials. By fitting the data of the finite element analysis of 350 kinds of different parameter combinations, the specific function expression can be obtained, as shown in equation (10).…”

Section: Determination Of Dimensionless Function 441 Determinationmentioning

confidence: 99%

“…In the first step, the real indentation work ratio of the materials containing residual stress is obtained. The parameter combinations determined in the second step are substituted into equation (10), and the residual stress s r of the materials is calculated.…”

Section: Inversion Analysis and Experimental Verificationmentioning

confidence: 99%

“…This material is called material containing yield plateau, and the coefficient α is used to reflect the material's yield plateau. In 2017 Pham and Kim [10] performed indentation simulation experiments on metal materials with yielding plateau, and selected contact stiffness S, indentation depth h and indentation work W as indentation parameters, and gave four dimensionless equations. Due to the large number of coefficients in the equation, the solution is more complicated.…”

Section: Introductionmentioning

confidence: 99%

“…In this paper, finite element simulation analysis is carried out on 350 kinds of metal materials with different residual stress parameters. According to the dimensional analysis method, the specific dimensionless function expressions with and without residual stress are established respectively, and a new inverse analysis method is proposed [10]. The analytical method was used to calculate the yield strength s , y strain hardening exponent n, the coefficient α and residual stress s r of the material.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Estimation of residual stress of metal material with yield plateau by continuous spherical indentation method

Deng

Zhao

Wang

2020

Mater. Res. Express

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In this paper, a novel method was proposed to measure the residual stress and plasticity parameters of metal materials with yield plateau through continuous spherical indentation test. The indentation energy was selected as the indentation parameter to establish a dimensionless equation between the residual stress and material parameters through dimensional analysis method. The effects of residual stress and plastic parameters on the indentation response tests are studied, and the dimensionless function expressions are determined respectively when the specimen with or without residual stress based on the finite element analysis data of different residual stress levels. Based on the self-established inverse analysis, the yield strength (s y ), strain hardening exponent (n), ratio coefficient (a) and residual stress (s r ) can be obtained through indentation test. At last, the validation of the method presented in this paper was verified by simulating the material (SS400 and SM490) with the known material parameters.

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Section: Inverse Analysis Methods For Verification Of Typical Metal Mamentioning

confidence: 99%

Section: Determination Of Dimensionless Function 441 Determinationmentioning

confidence: 99%

Section: Inversion Analysis and Experimental Verificationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Estimation of residual stress of metal material with yield plateau by continuous spherical indentation method

Deng

Zhao

Wang

2020

Mater. Res. Express

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The Effect of Residual Stresses on Stress–Strain Curves Obtained via Profilometry‐Based Inverse Finite Element Method Indentation Plastometry

Burley¹,

Campbell²,

Reiff-Musgrove

et al. 2021

Adv Eng Mater

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This paper concerns, the effect of (unknown) residual stresses in the near‐surface region of a sample on outcomes of an indentation plastometry technique for obtaining stress–strain relationships, using relatively large spherical indenters. The technique is based on the iterative finite element method (FEM) simulation of indentation, so as to infer the true stress–strain curve of the material (with the target outcome being the profile of the residual indent). It is expected that residual stress levels (if significant compared with the yield stress) are likely to influence the outcome, and indeed this forms the basis of many attempts to measure residual stresses in this way (using a known stress–strain curve). However, there are important issues of sensitivity here, which affect the reliability of such procedures and are also relevant to the accuracy of stress–strain curves inferred from measurements made on samples containing unknown levels of residual stress. Herein, both experimental work on samples with (equal‐biaxial) residual stresses created by the application of external loads and extensive FEM modeling to explore various scenarios are covered. The main conclusion is that the sensitivities involved are in general very low, particularly with relatively deep indentation. Inferred stress–strain curves are thus likely to be quite accurate, even in the presence of relatively high levels of residual stress. Conversely, the measurement of residual stress levels via this procedure is likely to be rather inaccurate, although the reliability is improved using shallow penetration (low ratio of depth‐to‐indenter radius). It is also noted that tensile residual stresses tend to influence outcomes more strongly than compressive ones.

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Profilometry‐Based Inverse Finite Element Method Indentation Plastometry

Clyne

Campbell²,

Burley³

et al. 2021

Adv Eng Mater

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This is a review of the current state‐of‐the‐art regarding a particular approach to extraction of the (quasistatic) stress–strain relationship of a metallic sample from an indentation experiment. It is based on the application of a relatively high load (kN range) to the sample via a large spherical indenter (≈1 mm radius), followed by measurement of the indent profile. This profile is then used as the target outcome for inverse finite element method (FEM) modeling of the test, aimed at converging on the best fit set of parameter values in a constitutive plasticity law (true stress–true strain relationship). This can then be used to simulate any specified loading configuration, including a conventional tensile test. Commercial products are now available in which the indentation, profilometry, and convergence operations are all automated and completed within a few minutes. The review covers the various conceptual and practical issues involved in implementation and optimization of these procedures, including both those related to the measurement system (experimental and FEM simulation) and those associated with the sample (such as anisotropy, inhomogeneities, and residual stresses). An attempt is made to convey an impression of the expected levels of reliability and also the scope for obtaining insights that are not readily obtainable using other types of test.

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Determination of equi-biaxial residual stress and plastic properties in structural steel using instrumented indentation

Cited by 50 publications

References 21 publications

Estimation of residual stress of metal material with yield plateau by continuous spherical indentation method

Estimation of residual stress of metal material with yield plateau by continuous spherical indentation method

The Effect of Residual Stresses on Stress–Strain Curves Obtained via Profilometry‐Based Inverse Finite Element Method Indentation Plastometry

Profilometry‐Based Inverse Finite Element Method Indentation Plastometry

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