CRACK INITIATION CRITERIA FOR DEFORMED ANISOTROPIC R260 RAIL STEEL
Paper i proceeding, 2022

Rail material selection and maintenance planning require accurate material failure criteria. While many of these criteria consider low-cycle fatigue of virgin materials, rail failure is known to occur after severe plastic deformations. It is, therefore, relevant to consider the applicability of such criteria during large plastic deformations. In this study, we simulate previously performed high-shear tension-torsion experiments using finite strain theory to evaluate the local stresses and strains. Based on these results, failure criteria are calibrated and validated. The Jiang-Sehitoglu criterion accurately fits and predicts failure. However, the identified parameter values are different from literature values for similar materials.

Plasticity

Anisotropy

FE simulations

Crack initiation criteria

Tension-torsion

Författare

Nasrin Talebi

Chalmers, Industri- och materialvetenskap, Material- och beräkningsmekanik

Johan Ahlström

Chalmers, Industri- och materialvetenskap, Konstruktionsmaterial

Magnus Ekh

Chalmers, Industri- och materialvetenskap, Material- och beräkningsmekanik

Knut Andreas Meyer

Technische Universität Braunschweig

CM 2022 - 12th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems, Conference Proceedings

857-864
9780646865881 (ISBN)

12th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems, CM 2022
Melbourne, Australia,

Ämneskategorier

Teknisk mekanik

Annan materialteknik

Metallurgi och metalliska material

Kompositmaterial och -teknik

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Senast uppdaterat

2024-01-03