Experimental analysis of indentation morphologies after spherical indentation

Pintaúde, Giuseppe; Hoechele, Alessandro Roberto

doi:10.1590/s1516-14392013005000154

Cited by 11 publications

(3 citation statements)

References 16 publications

(31 reference statements)

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“…These have been highlighted in several publications. [21][22][23]43,44] For example, a sphere is much less prone to becoming damaged than are shapes having edges or points. It is also easier to specify and manufacture.…”

Section: Indentation Geometry Representative Volumes and Plastic Stra...mentioning

confidence: 99%

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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Section: Indentation Geometry Representative Volumes and Plastic Stra...mentioning

confidence: 99%

Profilometry‐Based Inverse Finite Element Method Indentation Plastometry

Clyne

Campbell²,

Burley³

et al. 2021

Adv Eng Mater

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“…These advantages have been highlighted a number of times. [9][10][11][12][13] One motivation is that a sphere is much less prone to become damaged than are shapes having edges or points. It is also easier to specify and manufacture.…”

Section: Indenter Shapementioning

confidence: 99%

A Critical Appraisal of the Instrumented Indentation Technique and Profilometry‐Based Inverse Finite Element Method Indentation Plastometry for Obtaining Stress–Strain Curves

Campbell¹,

Zhang

Burley³

et al. 2021

Adv Eng Mater

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A comparison is presented between conventional tensile stress‐strain curves and those obtained via two methodologies based on (spherical) indentation. The first, termed Instrumented Indentation Technique (IIT), involves conversion of load‐displacement data to stress‐strain curves via analytical expressions. This has been done using loads below 1 N (“nano”) and in the kN range (“macro”). The other procedure, termed profilometry‐based indentation plastometry (PIP), is based on repeated finite element method (FEM) simulation, using the residual indent profile as the target outcome and obtaining the best fit set of parameter values in a constitutive stress‐strain law. This has been done on a macro scale only. The data from nano‐IIT tend to be very noisy and variable, whereas those from macro‐IIT are more reproducible and less noisy. With one of the two empirical formulations employed, the agreement of the macro‐IIT with experiment is close to being acceptable for the work hardening characteristics, although inferred values of the yield stress are in poor agreement with those from tensile testing. In contrast to this, the PIP procedure provides outcomes that are in close agreement with those from tensile testing, concerning both yield stress and work hardening. The causes of this are explored and discussed.

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“…The applicability of computers and numerical techniques has led to the fast development of various indentation testing methods in recent times which includes spherical indentation as applied by [4]- [7]. Computational and theoretical studies have simultaneously emerged intending to clarify the contact system and deformation mechanisms.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Indentation Test Using Solid Works Simulation

Kamtu¹,

Zwalnan²

2020

EmAIT

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The finite element analysis of spherical indentation was conducted using the SolidWorks simulation software. The relationship between the load and indention was determined, and comparison with the Hertzian solution was made. In this study, spherical indenters of diameter 5, 10 and 15 mm were used to assess the effect of indenter radius on indentation response at a specified load. The outcome of our study shows that the resulting load-indentation response does not closely correlate; as a result, a difference of 21.2% was observed between the hertz solution and simulated results. The increase in diameter was observed to be associated with the corresponding decrease in indentation depth and the indentation stress. The von Mises stress contour at maximum load was analysed and was observed to be the highest on the indented surface beneath the indenter. The resultant displacement contour shows a uniform displacement distribution.

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Experimental analysis of indentation morphologies after spherical indentation

Cited by 11 publications

References 16 publications

Profilometry‐Based Inverse Finite Element Method Indentation Plastometry

Profilometry‐Based Inverse Finite Element Method Indentation Plastometry

A Critical Appraisal of the Instrumented Indentation Technique and Profilometry‐Based Inverse Finite Element Method Indentation Plastometry for Obtaining Stress–Strain Curves

Analysis of Indentation Test Using Solid Works Simulation

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