Local and equivalent stress intensity factors for tortuous cracks under remote mode II loading

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F19%3A00511004" target="_blank" >RIV/68081723:_____/19:00511004 - isvavai.cz</a>

Alternative codes found

RIV/00216305:26210/19:PU133027

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S0167844218306372?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0167844218306372?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.tafmec.2019.01.030" target="_blank" >10.1016/j.tafmec.2019.01.030</a>

Result language

angličtina

Original language name

Local and equivalent stress intensity factors for tortuous cracks under remote mode II loading

Original language description

In metallic materials the paths and fronts of fatigue cracks usually exhibit a certain tortuosity caused by microstructural heterogeneities. Our previous calculations for remote mode III loading revealed that the in-plane tortuosity of pre-crack fronts was associated with significant local k2 components of the effective stress intensity factor (SIF), thus enabling small segments growing in the local mode II to gradually advance the whole “mode III” crack front. In this work, the local effective SIFs at both in-plane and out-of-plane (3D) serrated crack fronts in the compact-tension-shear specimen under the remote mode II loading are numerically investigated by neglecting the friction stresses. The changes in local and global effective SIFs are presented separately for in-plane and out-of-plane tortuous crack fronts and, on the global level, also for their combination. Local k3 components appeared at in-plane serrated crack fronts and, for the out-of-plane roughness, local k1-values were present. For equal levels of the remote mode II loading, a geometrical shielding effect induced by the crack tortuosity, i.e., a uniform decrease of an averaged k2-value with increasing roughness of the crack front was revealed. When all three local loading modes along the tortuous crack front were considered in terms of equivalent SIFs, the shielding effect was also revealed in an entire or a prevailing range of roughness characteristics. However, some of equivalent SIF definitions predicted an unexpected slight anti-shielding effect in a certain small range of roughness characteristics close to those associated with crack fronts in real metallic materials.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20501 - Materials engineering

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2019

Confidentiality

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

Name of the periodical

Theoretical and Applied Fracture Mechanics

ISSN

0167-8442

e-ISSN

—

Volume of the periodical

101

Issue of the periodical within the volume

JUN

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

11

Pages from-to

35-45

UT code for WoS article

000466257700004

EID of the result in the Scopus database

2-s2.0-85061527232