The effect of subsurface crack opening on the stress intensity factor under cyclic thermal loads

Juha Kuutti, Iikka Virkkunen

Research output: Contribution to journalArticleScientificpeer-review

Abstract

This study considers surface crack behaviour under periodic thermal loads using weight functions and finite element calculations. A surface and subsurface crack opening mode during the load cycle was observed. The subsurface mode where the crack mouth is closed while the crack tip remains open can be more critical for deeper cracks. Crack face contact is required to obtain the subsurface mode both with finite elements and weight functions. A combination of surface and subsurface weight functions can capture the crack behaviour throughout the load cycle. This behaviour is demonstrated using numerous simulations with periodic thermal loads with different extent and frequency.

Original languageEnglish
Article number106600
JournalEngineering Fracture Mechanics
Volume218
DOIs
Publication statusPublished - Sep 2019
MoE publication typeA1 Journal article-refereed

Fingerprint

Thermal load
Stress intensity factors
Cracks
Crack tips

Keywords

  • Crack closure
  • Stress intensity factor
  • Surface flaw
  • Thermal fatigue
  • Weight function

Cite this

@article{c843790f7db942b4baa02754c3b940a4,
title = "The effect of subsurface crack opening on the stress intensity factor under cyclic thermal loads",
abstract = "This study considers surface crack behaviour under periodic thermal loads using weight functions and finite element calculations. A surface and subsurface crack opening mode during the load cycle was observed. The subsurface mode where the crack mouth is closed while the crack tip remains open can be more critical for deeper cracks. Crack face contact is required to obtain the subsurface mode both with finite elements and weight functions. A combination of surface and subsurface weight functions can capture the crack behaviour throughout the load cycle. This behaviour is demonstrated using numerous simulations with periodic thermal loads with different extent and frequency.",
keywords = "Crack closure, Stress intensity factor, Surface flaw, Thermal fatigue, Weight function",
author = "Juha Kuutti and Iikka Virkkunen",
year = "2019",
month = "9",
doi = "10.1016/j.engfracmech.2019.106600",
language = "English",
volume = "218",
journal = "Engineering Fracture Mechanics",
issn = "0013-7944",
publisher = "Elsevier",

}

The effect of subsurface crack opening on the stress intensity factor under cyclic thermal loads. / Kuutti, Juha; Virkkunen, Iikka.

In: Engineering Fracture Mechanics, Vol. 218, 106600, 09.2019.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - The effect of subsurface crack opening on the stress intensity factor under cyclic thermal loads

AU - Kuutti, Juha

AU - Virkkunen, Iikka

PY - 2019/9

Y1 - 2019/9

N2 - This study considers surface crack behaviour under periodic thermal loads using weight functions and finite element calculations. A surface and subsurface crack opening mode during the load cycle was observed. The subsurface mode where the crack mouth is closed while the crack tip remains open can be more critical for deeper cracks. Crack face contact is required to obtain the subsurface mode both with finite elements and weight functions. A combination of surface and subsurface weight functions can capture the crack behaviour throughout the load cycle. This behaviour is demonstrated using numerous simulations with periodic thermal loads with different extent and frequency.

AB - This study considers surface crack behaviour under periodic thermal loads using weight functions and finite element calculations. A surface and subsurface crack opening mode during the load cycle was observed. The subsurface mode where the crack mouth is closed while the crack tip remains open can be more critical for deeper cracks. Crack face contact is required to obtain the subsurface mode both with finite elements and weight functions. A combination of surface and subsurface weight functions can capture the crack behaviour throughout the load cycle. This behaviour is demonstrated using numerous simulations with periodic thermal loads with different extent and frequency.

KW - Crack closure

KW - Stress intensity factor

KW - Surface flaw

KW - Thermal fatigue

KW - Weight function

UR - http://www.scopus.com/inward/record.url?scp=85070058267&partnerID=8YFLogxK

U2 - 10.1016/j.engfracmech.2019.106600

DO - 10.1016/j.engfracmech.2019.106600

M3 - Article

VL - 218

JO - Engineering Fracture Mechanics

JF - Engineering Fracture Mechanics

SN - 0013-7944

M1 - 106600

ER -