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Stress state characterization of ductile materials during scratch abrasion

  • Abrasive wear limits the lifetime of many machine components. Most empirical models relate the abrasive wear resistance to material hardness. In reality, however, other material properties are also influencing as scratch abrasion damage follows from a highly complex stress trajectory upon scratching. Numerical (finite element) simulation of scratch abrasion requires the use of a material damage model, which translates this stress trajectory into material degradation and removal. Most damage models include the first two stress invariants. However, fully incorporating the complex stress trajectories that occur during scratch abrasion may require damage models with dependence of the third deviatoric parameter (Lode angle). This paper serves as an a-priori study to evaluate the stress states that may occur during scratch abrasion. Three mechanisms (ploughing, wedging, cutting) are considered. Hereto, the results of an extensive parametric study using elastic-plastic finite element simulations of a scratch indentation process are discussed. Complex, non-proportional variations in stress state values are observed to occur during scratch abrasion. Distinct stress state trajectories are identified for the three abovementioned mechanisms. These variations are critically discussed to motivate a selection of suitable damage models for rigorous finite element analysis of the wear processes associated with scratch abrasion.

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Metadaten
Author:Dhanraj RajaramanORCiD, Vincent KeimORCiD, Kannaki PondicherryORCiD, Aida NonnORCiDGND, Stijn Hertele, Dieter Fauconnier
DOI:https://doi.org/10.1016/j.wear.2021.203712
Parent Title (English):Wear
Publisher:Elsevier
Document Type:Article
Language:English
Year of first Publication:2021
Release Date:2022/02/03
Tag:AISI D2; BEHAVIOR; CHIP FORMATION; Finite element analysis; Fracture; HARDNESS; Lode angle; METAL-CUTTING PROCESS; Plasticity; Scratch abrasion; Stress state; Stress triaxiality; WEAR; simulation
Volume:476
Issue:15
Article Number:203712
Institutes:Fakultät Maschinenbau
Fakultät Maschinenbau / Computational Mechanics and Materials Lab (CMM)
Begutachtungsstatus:peer-reviewed
research focus:Produktion und Systeme
Licence (German):Keine Lizenz - Es gilt das deutsche Urheberrecht: § 53 UrhG
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