The prediction of damage accumulation during upsetting tests based on McClintock's model

Sonntag, Robert; Chandrasekaran, N.; Dung, N. L.; Mahrenholtz, O.

doi:10.1007/bf02560771

Cited by 13 publications

(1 citation statement)

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“…The critical parameter defined in this model depends on the principal stresses defined at the major and minor axes of the ellipse, and it also depends on the hardening exponent obtained from the constitutive law. This model was used by Sowerby et al (1985) to assess the damage and its accumulation in AISI 1045 steel samples subjected to different compression tests, showing that it approaches properly the growth of microvoids, but it does not account for the phenomenon of nucleation and later coalescence. Moreover, Rice and Tracey (1969) proposed a variational principle for the growth of cavities in a rigid plastic material that contains an initially spherical internal microvoid that is subjected to a remote deformation velocity field.…”

Section: Introductionmentioning

confidence: 99%

Assessment of ductile failure models in single-pass wire drawing processes

González

Celentano

Cruchaga

2017

International Journal of Damage Mechanics

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The present work reports a comparative study of ductile failure models applied to an Al-2011 aluminum alloy single-pass wire drawing process using different reductions. The material damage experienced in the wire after passing through the die is evaluated using the well-known Rice and Tracey, Cockcroft and Latham, Brozzo and Modified Chaouadi models. Due to the fact that nonrealistic damage predictions are found for the highest studied wire reduction, an alternative uncoupled failure criterion combining the effect of deformation and triaxility is proposed. The ability of these five models in predicting the formation of chevrons in the process is the main focus of this research. First, the model parameters are characterized by means of numerical simulations of the tensile test. Then, the predictions of the numerical analyses of the drawing process are compared with available experimental results where physical evidence of chevrons was found. Relevant variables are analyzed to determine their incidence in the formation of central bursts. Finally, the performance of this new model is assessed for the full reduction scenarios.

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Section: Introductionmentioning

confidence: 99%