Details

Autor(en) / Beteiligte

• Mohammadi, S.
• Torabi, A.R.

Titel

A review on ductile fracture prediction of cracked/notched components: The distinct and simplifying roles of the equivalent material concept and fictitious material concept

Ist Teil von

• Theoretical and applied fracture mechanics, 2024-04, Vol.130, p.104290, Article 104290

Ort / Verlag

Elsevier Ltd

Erscheinungsjahr

2024

Link zum Volltext

Quelle

Elsevier ScienceDirect Journals

Beschreibungen/Notizen

• •Research related to ductile fracture of cracked/notched components is reviewed and gathered.•Ductile fracture models involve void-based, stress-based, and energy-based ones.•The role of EMC/MEMC/FMC is to make it possible to use LEFM for ductile materials.•EMC, MEMC, and FMC are shown to be successful in various ductile failure regimes.•EMC, MEMC, and FMC are macroscopic approaches and efficient only for critical load prediction. Most of engineering structures and components are made of ductile materials, while fracture mechanics tools have been mostly developed for brittle materials. This article investigates the critical load estimation in fracture problems in presence of the elasto-plasticity from the standpoint of major approaches in fracture mechanics including theoretical, experimental, and computational. A review is comprehensively performed on literature with a main focus on two new concepts, namely the Equivalent Material Concept (EMC) and the Fictitious Material Concept (FMC), by which elastoplastic ductile materials can be simplified to linear elastic brittle materials. Therefore, by overcoming the nonlinear aspects, solving of the fracture problems in the linear elastic fracture mechanics (LEFM) framework becomes possible. It is understood from this comprehensive literature survey that while there are several approaches for estimating ductile fracture in cracked/notched members under various loading conditions, most of them need nonlinear analyses, which are typically time-consuming and complicated. It is shown that EMC can work simply and well on those nonlinear materials having small strain-hardening and small/moderate strain-to-failure, while FMC can be effectively and easily applied to nonlinear materials having moderate/great strain-hardening and/or large strain-to-failure, where failure means necking.