Publication detail

The effect of constraint level on a crack path

ŠEVČÍK, M. HUTAŘ, P. NÁHLÍK, L. SEITL, S.

Original Title

The effect of constraint level on a crack path

Type

journal article - other

Language

English

Original Abstract

The main aim of the work was to estimate the effect of a constraint on a predicted crack path and indicate cases where the failure of a component could be described more precisely by constraint-based description. Special specimen geometry with a high level of constraint was developed and numerical predictions of the crack path were compared with experimental results. The numerical model was built using commercial software ANSYS and a special procedure for the crack propagation was developed. The numerical prediction of the crack path based on a modified Maximum Tangential Stress (MTS) criterion (the criterion uses a two-parameter description of the stress field around the crack tip) is generally in agreement with the experimental data. The classical MTS criterion was found much more sensitive on the crack increment. Based on our numerical predictions it can be concluded that the modified MTS criterion predicted the crack path more precisely, especially in a case with high constraint level. This assumption is also demonstrated on the practical example of gear failure. A gear with a thin rim induces a relatively high level of constraint. It is shown that the influence of the constraint can significantly change the calculated crack path in specific cases.

Keywords

Fracture mechanics; Constraint effect; Crack propagation; MTS criterion; Gear rim

Authors

ŠEVČÍK, M.; HUTAŘ, P.; NÁHLÍK, L.; SEITL, S.

RIV year

2013

Released

1. 4. 2013

Publisher

Elsevier

ISBN

1350-6307

Periodical

ENGINEERING FAILURE ANALYSIS

Year of study

2013 (29)

Number

1

State

United Kingdom of Great Britain and Northern Ireland

Pages from

83

Pages to

92

Pages count

10

BibTex

@article{BUT97224,
  author="Martin {Ševčík} and Pavel {Hutař} and Luboš {Náhlík} and Stanislav {Seitl}",
  title="The effect of constraint level on a crack path",
  journal="ENGINEERING FAILURE ANALYSIS",
  year="2013",
  volume="2013 (29)",
  number="1",
  pages="83--92",
  issn="1350-6307"
}