Influence of specimen thickness with rectangular cross-section on the tensile properties of structural steels

Grain size and particle dispersion effects on the tensile behavior of friction stir welded MA956 oxide dispersion strengthened steel from low to elevated temperatures

“…Previous research showed that large gradients in microstructure and hardness exist at the retreating side (RS) and advancing side (AS) of the weld nugget, and the gage section of the tensile specimen was intentionally designed to avoid any possible effects from these gradients. Extensive literature review and finite element modeling was conducted to verify the suitability of the specimen geometry prior to testing, and although the specimen geometry does not conform to an ASTM standard, it is similar to those used or proposed for use in miniature mechanical testing of irradiated materials [42][43][44][45][46]. The specific aspects considered were the aspect ratio of the specimen (defined as the thickness to width ratio of the gage section) and the radius of curvature from the grip to the gauge section to ensure that yield stress and ultimate strain values were not adversely affected by design and that failure would occur in the gage section.…”

Effect of the build orientation on the mechanical properties and fracture modes of SLM Ti–6Al–4V

“…As the elongation at break is inversely proportional to ' ( , where L and A are the initial gauge length and cross-sectional area respectively (ASTM E8/E8M), flat samples showed a reduction in strength and ductility [45]. Because of the possibility of interlayer porosity that can occur during SLM, it was not surprising that the vertical barsconsisting of the highest number of layers -have the lowest yield strength and UTS [17,19].…”

An analysis on necking effect and stress distribution in round cross-section specimens of pure copper with different diameters

“…The single factor analysis method (SFAM) [23] was used to analyse the correlation between the c and the diameter of the specimens. The rejection region, F, was calculated by…”

“…Recent studies have shown that the size of a rectangular specimen influences its tensile properties [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26], including strength [11][12][13][14]19], ductility [19,20,22,24], and the constitutive relation [23]. The effect of the diameter of a round bar specimen on its tensile properties has also been investigated [27,28].…”

“…However, the mechanism of the size effect on specimens with round crosssections in tensile tests remains unclear, and there are few reports examining the consistency between the finite element simulations and experimental results. In a previous study [23], a failure criterion was proposed, wherein the true fracture stress was assumed to be equal for specimens of various thicknesses with rectangular cross-sections to simulate the elongation of the specimen by finite element methods (FEM). The influence of the thickness of the specimen on the tensile properties was then investigated through both experiments and FEM.…”