English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

In particular types of layer- or lamellar-like microstructures such aspearlite and lath martensite, plastic slip occurs favorably in directionsparallel to inter-lamellar boundaries. This may be due to the interplay betweenmorphology and crystallographic orientation or, more generally, due toconstraints imposed on the plastic slip due to the lamellar microstructuralgeometry. This paper proposes a micromechanics based, computationallyefficient, scale independent model for particular type of lamellarmicrostructures containing softer lamellae, which are sufficiently thin to beconsidered as discrete slip planes embedded in a matrix representing the harderlamellae. Accordingly, the model is constructed as an isotropic visco-plasticmodel which is enriched with an additional orientation-dependent planar plasticdeformation mechanism. This additional mode is activated when the applied load,projected on the direction of the soft films, induces a significant amount ofshear stress. Otherwise, the plastic deformation is governed solely by theisotropic part of the model. The response of the proposed model is assessed viaa comparison to direct numerical simulations (DNS) of an infinite periodictwo-phase laminate. It is shown that the yielding behavior of the model followsthe same behavior as the reference model. It is observed that the proposedmodel is highly anisotropic, and the degree of anisotropy depends on thecontrast between the slip resistance (or yield stress) of the planar modeversus that of the isotropic part. The formulation is then applied to model thesubstructure of lath martensite with inter-layer thin austenite films. It isexploited in a mesoscale simulation of a dual-phase (DP) steelmicrostructure.The results are compared with those of a standard isotropicmodel and a full crystal plasticity model.

An effective anisotropic visco-plastic model dedicated to high contrast  ductile laminated microstructures: Application to lath martensite  substructure