Experimental and numerical investigation of crack initiation and propagation in silicon nitride ceramic under rolling and cyclic contact

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F17%3A00506664" target="_blank" >RIV/68081723:_____/17:00506664 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1088/1742-6596/843/1/012030" target="_blank" >http://dx.doi.org/10.1088/1742-6596/843/1/012030</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1742-6596/843/1/012030" target="_blank" >10.1088/1742-6596/843/1/012030</a>

Result language

angličtina

Original language name

Experimental and numerical investigation of crack initiation and propagation in silicon nitride ceramic under rolling and cyclic contact

Original language description

The focus of the work was to investigate crack initiation and propagation mechanisms in silicon nitride undergoing non-conforming hybrid contact under various tribological conditions. In order to understand the prevailing modes of damage in silicon nitride, two distinct model experiments were proposed, namely, rolling contact and cyclic contact experiments. The rolling contact experiment was designed in order to mimic the contact conditions appearing in hybrid bearings at contact pressures ranging from 3 to 6 GPa. On the other hand, cyclic contact experiments with stresses ranging from 4 to 15 GPa under different media were carried out to study damage under localised stresses. In addition, the experimentally observed cracks were implemented in a finite element model to study the stress redistribution and correlate the generated stresses with the corresponding mechanisms. Crack propagation under rolling contact was attributed to two different mechanisms, namely, fatigue induced fracture and lubricant driven crack propagation. The numerical simulations shed light on the tensile stress driven surface and subsurface crack propagation mechanisms. On the other hand, the cyclic contact experiments showed delayed crack formation for lubricated cyclic contact. Ceramographic cross-sectional analysis showed crack patterns similar to Hertzian crack propagation under cyclic contact load.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

—

OECD FORD branch

20504 - Ceramics

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

6TH INTERNATIONAL CONFERENCE ON FRACTURE FATIGUE AND WEAR (FFW)

ISBN

—

ISSN

1742-6588

e-ISSN

—

Number of pages

9

Pages from-to

012030

Publisher name

IOP Publishing

Place of publication

Bristol

Event location

Porto

Event date

Jul 26, 2017

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

000412799100030