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Ductile fracture micro-mechanisms of high strength low alloy steels
Highlights Tensile tests were done for three different notched specimens of HSLA-100 steel. FEM simulation was done to model true stress–true strain plots. Void characterisation was done for all. BNN model was created to correlate void fraction with its influencing parameters. Model was validated through present experimental data and other data published in literatures.
Abstract There has been a considerable amount of research investigating the strain induced void accumulation under uniaxial deformation which is, in principle, affected by both the applied stress (i.e., hydrostatic stress) and the resulting plastic strain. It has been not clear in these circumstances whether this damage accumulation is stress assisted or strain induced. In order to investigate this issue, tensile experiments were carried out at various notch geometries to correlate the void area fraction with the equivalent plastic strain and the stress triaxility ratio of high strength low alloy (HSLA-100) steel at ambient temperature. A Bayesian neural network model is also created to correlate the complex relationship between the void area fraction with its influencing parameters in a variety of high strength low alloy steels under tension published in the literature. The model has been validated through the present experimental data and the other data published in the literature. The effect of all individual variables on damage accumulations has also been investigated.
Ductile fracture micro-mechanisms of high strength low alloy steels
Highlights Tensile tests were done for three different notched specimens of HSLA-100 steel. FEM simulation was done to model true stress–true strain plots. Void characterisation was done for all. BNN model was created to correlate void fraction with its influencing parameters. Model was validated through present experimental data and other data published in literatures.
Abstract There has been a considerable amount of research investigating the strain induced void accumulation under uniaxial deformation which is, in principle, affected by both the applied stress (i.e., hydrostatic stress) and the resulting plastic strain. It has been not clear in these circumstances whether this damage accumulation is stress assisted or strain induced. In order to investigate this issue, tensile experiments were carried out at various notch geometries to correlate the void area fraction with the equivalent plastic strain and the stress triaxility ratio of high strength low alloy (HSLA-100) steel at ambient temperature. A Bayesian neural network model is also created to correlate the complex relationship between the void area fraction with its influencing parameters in a variety of high strength low alloy steels under tension published in the literature. The model has been validated through the present experimental data and the other data published in the literature. The effect of all individual variables on damage accumulations has also been investigated.
Ductile fracture micro-mechanisms of high strength low alloy steels
Das, Arpan (author) / Chowdhury, Tamshuk (author) / Tarafder, Soumitra (author)
2013-09-06
8 pages
Article (Journal)
Electronic Resource
English
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