Creep constitutive law prediction via short-term evaluation using a small size testing method

Huang, Yihui; Kadowaki, Makoto; Nakano, Takanori; Kawada, Tatsuya; Watanabe, S.; Sato, Kazuhisa

doi:10.1016/j.egyr.2023.07.046

Cited by 1 publication

(1 citation statement)

References 19 publications

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“…Recently, a European standard was published [6]. Thus far, the SP test has been successfully used to estimate (i) the ductile-tobrittle transition temperature where SP tests at different temperatures are used to derive the SP energy as function of test temperature [1,2,7]; (ii) tensile properties, in particular the yield strength (YS) and ultimate tensile strength (UTS) [8][9][10][11][12]; (iii) fracture and damage parameters [3,13,14]; and (iv) creep properties [15][16][17][18][19][20][21][22]. In the European standard [6], the associated methods are described in informative, non-mandatory annexes.…”

Section: Introductionmentioning

confidence: 99%

An Improved Correlation for the Estimation of the Yield Strength from Small Punch Testing

Altstadt

2023

Metals

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This study aims at improving the empirical correlation for estimating the yield strength from small punch tests. The currently used procedure in the European standard EN 10371 to determine the elastic–plastic transition force—based on bi-linear fitting—involves a dependency not only on the onset of plastic flow but also on the work hardening of the material. Consequently, the yield strength correlation factor is not universal but depends on the material properties and on the geometry of the small punch set-up, leading to a significant uncertainty in the yield strength estimation. In this study, an alternative definition of the elastic–plastic transition force is proposed, which depends significantly less on the work hardening of the material and on the small punch geometry. The approach is based on extensive elastic–plastic finite element simulations with generic material properties, including a systematic variation of the yield strength, ultimate tensile strength, and uniform elongation. The new definition of the transition force is based on the deviation of the force-deflection curve from the analytical elastic slope derived by Reissner’s plate theory. A significant reduction of the uncertainty of the yield strength estimation is demonstrated.

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Section: Introductionmentioning

confidence: 99%

An Improved Correlation for the Estimation of the Yield Strength from Small Punch Testing

Altstadt

2023

Metals

View full text Add to dashboard Cite

show abstract

Creep constitutive law prediction via short-term evaluation using a small size testing method

Cited by 1 publication

References 19 publications

An Improved Correlation for the Estimation of the Yield Strength from Small Punch Testing

An Improved Correlation for the Estimation of the Yield Strength from Small Punch Testing

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