On the stress state-based coupled plasticity – Ductile damage model for aluminum alloys considering the influence of high-rate impulsive preload

Rad, Sina Gohari; Zajkani, Asghar

doi:10.1016/j.ijimpeng.2020.103715

Cited by 5 publications

(1 citation statement)

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“…Dick et al 26 introduced a path-independent model for the case of multi-stages forming techniques. Recently, Rad and Zajkani 27 introduced a stress state-based coupled plasticity-ductile damage model for aluminum alloys considering the influence of high-rate impulsive preload. In this work, a fully nonlinear FEM is developed to capture the corresponding stress state, hardening, and damage evolutions during experiments of high-velocity pressure pules done by shock tubes.…”

Section: Introductionmentioning

confidence: 99%

Localized forming limit analysis of substrate-supported metals: Influence of yield-dependent necking bound angle

Bandizaki

Zajkani

Moulood

2021

Proceedings of the Institution of Mechanical Engineers, Part B:

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In this paper, the influence of functional elastomeric substrate-supported layers for enhancing potential resistance capability against localized plastic failure of advanced high strength steels is considered based on a localized necking model of vertex theory. Application of this structure leads to postponing the plastic instability of the metallic part. By defining diffuse and localized modes of deformation in a general framework, the theoretical models are developed to predict necking limits at several stress states. In addition, the results of the Hookean and neo-Hookean elastomers are compared in terms of strain hardening with the anisotropy parameter of Hill’s yield criteria. Since necking band angle (NBA) is a principal factor for the necking prediction, its effect on bifurcation events is evaluated specifically for different ratios of stress rate, and quadratic and non-quadratic yield criteria. This analysis is performed by proposing a supported and yield-dependent necking bound angle (YD-NBA). All considerations are done by providing equilibrium conditions governed over the NBA. Finally, obtained results indicate good agreements between several theoretical considerations and experimental data.

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Section: Introductionmentioning

confidence: 99%