The effect of size on the mechanical properties of rolled specimen: predictions and experimental evaluation

Trieu, Khuong; Wang, Xiubing

doi:10.1088/2053-1591/ab4531

Cited by 3 publications

(1 citation statement)

References 9 publications

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“…Together with fracture toughness at quasistatic loading conditions or impact toughness, these characteristics are considered to be the basic mechanical properties of the material, and they are most often included in regulations for structural steels. The mechanical properties of steels are dependent not only on intrinsic microstructural features, such as the grain size and structure of the precipitated particles [1][2][3][4], but also on extrinsic testing conditions, such as strain rate [5,6], specimen geometry and size [4,[7][8][9][10][11][12][13], and temperature [14][15][16]. Therefore, testing conditions and the geometry and dimensions of specimens are regulated by standards [17,18].…”

Section: Introductionmentioning

confidence: 99%

Specimen Size Effect on the Tensile Properties of Rolled Steel of Long-Term-Operated Portal Crane

et al. 2023

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This paper presents the research results on the mechanical behavior of the low-carbon rolled steel of a sea portal crane after a 33-year operation depending on the operational stresses and rolling direction in order to assess its serviceability. The tensile properties of steels were investigated using rectangular cross-section specimens with different thicknesses and the same width. Strength indicators were slightly dependent on the considered factors (operational conditions, the cutting direction, and thickness of specimens). However, a clear trend of higher ultimate strength for thinner specimens was noticed, especially in the case of more brittle material due to its operational degradation. Plasticity of the tested steel specimens was more sensitive to the influence of the above-mentioned factors than strength but less sensitive than impact toughness. Uniform elongation was slightly less for thinner specimens regardless of the investigated steel state or the orientation of specimens relative to the rolling direction. The post-necking elongation was lower for transversal specimens compared with longitudinal ones, and the effect was more significant when testing steel with the lowest brittle fracture resistance. Among the tensile properties, non-uniform elongation was demonstrated to be the most effective for assessing the operational changes in the state of rolled steels.

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