Numerical evaluation of J-R curve using small punch test data

Kumar, Pradeep; Dutta, B.K.; Chattopadhyay, J.; Shriwastaw, R.S.

doi:10.1016/j.tafmec.2016.08.003

Cited by 12 publications

(4 citation statements)

References 29 publications

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“…(3) that utilizes a load, P i , which occurs within Zone III, indicating the onset of necking or plastic instability within the SP sample and for which the correlation constant is independent of material properties and thus may be more universally appropriate for a range of materials [76]. The preceding equations for determining yield strength and ultimate tensile strength could then be used with the Ramberg-Osgood hardening law in order to determine the hardening exponent, n, and generate true stress-strain data [77]. Achieving consistent, uniform thickness for numerous samples can be difficult on such a small scale.…”

Section: Direct Correlation With Tensile Propertiesmentioning

confidence: 99%

“…The model was separated into six stages and parameters were determined one at a time using the inverse method. Dutta et al suggested a method to improve the numerical prediction of fracture initiation and overall fracture energy curve calculation using the Gurson-Tevergaard-Needleman material model with split parameters [188], which was shown to improve prediction and determination of J-integral versus crack growth data [77]. Similarly, damage parameters for the Gurson-Tevergaard-Needleman model have been used to precisely simulate fracture of notched SPT specimens of varying configurations [127].…”

Section: Finite Element Analysis Of the Sptmentioning

confidence: 99%

“…Although not considered an additive manufacturing technology due to its manufacturing [38,43,48,52,54,60,63,70,77,82,187,194,195,208,[210][211][212]215]. methodology, the powdered metallurgy (PM) alloys in [43] present a similar sensitivity and variance as AM materials.…”

Section: Determination and Use Of Correlation Constantsmentioning

confidence: 99%

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Mechanics of the small punch test: a review and qualification of additive manufacturing materials

Torres

Gordon

2021

J Mater Sci

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The small punch test (SPT) was developed for situations where source material is scarce, costly or otherwise difficult to acquire, and has been used for assessing components with variable, location-dependent material properties. Although lacking standardization, the SPT has been employed to assess material properties and verified using traditional testing. Several methods exist for equating SPT results with traditional stress–strain data. There are, however, areas of weakness, such as fracture and fatigue approaches. This document outlines the history and methodologies of SPT, reviewing the body of contemporary literature and presenting relevant findings and formulations for correlating SPT results with conventional tests. Analysis of literature is extended to evaluating the suitability of the SPT for use with additively manufactured (AM) materials. The suitability of this approach is shown through a parametric study using an approximation of the SPT via FEA, varying material properties as would be seen with varying AM process parameters. Equations describing the relationship between SPT results and conventional testing data are presented. Correlation constants dictating these relationships are determined using an accumulation of data from the literature reviewed here, along with novel experimental data. This includes AM materials to assess the fit of these and provide context for a wider view of the methodology and its interest to materials science and additive manufacturing. A case is made for the continued development of the small punch test, identifying strengths and knowledge gaps, showing need for standardization of this simple yet highly versatile method for expediting studies of material properties and optimization.

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Section: Direct Correlation With Tensile Propertiesmentioning

confidence: 99%

Section: Finite Element Analysis Of the Sptmentioning

confidence: 99%

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Mechanics of the small punch test: a review and qualification of additive manufacturing materials

Torres

Gordon

2021

J Mater Sci

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“…1, because this aluminium alloy does not exhibit a yield point. (Kumar et al, 2016). It can also perspectively contribute to the more accurate life assessment and extend the service life of components in industry.…”

Section: Calculationsmentioning

confidence: 99%

Standard tensile test compared to the small punch test of aluminium alloy

2018

Engineering Mechanics

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The paper deals with certain similarities in results of standard tensile testing and small punch tests. The study is conducted using wrought aluminium alloy 2024-T351, which is solution heat treated, stressrelieved stretched and then cold worked. This aerospace alloy has been rarely used in small punch testing, but it is well documented by standard testing techniques. Basic mechanical properties obtained by two distinct methods are compared and main consequences of the empirical estimations from the small punch testing are concluded.

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