Publication detail

Experimental evidence of a common local mode II growth mechanism of fatigue cracks loaded in modes II, III and II+III in niobium and titanium

VOJTEK, T. HOHENWARTER, A. POKLUDA, J. PIPPAN, R.

Original Title

Experimental evidence of a common local mode II growth mechanism of fatigue cracks loaded in modes II, III and II+III in niobium and titanium

English Title

Experimental evidence of a common local mode II growth mechanism of fatigue cracks loaded in modes II, III and II+III in niobium and titanium

Type

journal article in Web of Science

Language

en

Original Abstract

The paper is focused on an identification of the local mode II mechanism of fatigue cracks loaded under the remote mode III and the mixed mode II + III and presents a convincing experimental evidence of such a mechanism in materials with a nearly coplanar crack growth. Closure-free data were obtained by applying fatigue experiments in modes II, III and II + III in commercially pure titanium and niobium. The results revealed that the micromechanism of propagation of all kinds of shear-mode cracks can be described by a common model of advances of local mode II crack segments nearly in the direction of applied shear stress. These segments nucleated at spatial geometrical irregularities of the precrack front generating fibrous patterns at fracture surfaces.

English abstract

The paper is focused on an identification of the local mode II mechanism of fatigue cracks loaded under the remote mode III and the mixed mode II + III and presents a convincing experimental evidence of such a mechanism in materials with a nearly coplanar crack growth. Closure-free data were obtained by applying fatigue experiments in modes II, III and II + III in commercially pure titanium and niobium. The results revealed that the micromechanism of propagation of all kinds of shear-mode cracks can be described by a common model of advances of local mode II crack segments nearly in the direction of applied shear stress. These segments nucleated at spatial geometrical irregularities of the precrack front generating fibrous patterns at fracture surfaces.

Keywords

Shear loding modes; Local mode II; Growth mechanism; 3D crack path; Coplanar growth

Released

01.11.2016

Publisher

Elsevier

ISBN

0142-1123

Periodical

INTERNATIONAL JOURNAL OF FATIGUE

Year of study

92

Number

1

State

GB

Pages from

470

Pages to

477

Pages count

8

Documents

BibTex


@article{BUT129023,
  author="Tomáš {Vojtek} and Anton {Hohenwarter} and Jaroslav {Pokluda} and Reinhard {Pippan}",
  title="Experimental evidence of a common local mode II growth mechanism of fatigue cracks loaded in modes II, III and II+III in niobium and titanium",
  annote="The paper is focused on an identification of the local mode II mechanism of fatigue cracks loaded under the remote mode III and the mixed mode II + III and presents a convincing experimental evidence of such a mechanism in materials with a nearly coplanar crack growth. Closure-free data were obtained by applying fatigue experiments in modes II, III and II + III in commercially pure titanium and niobium. The results revealed that the micromechanism of propagation of all kinds of shear-mode cracks can be described by a common model of advances of local mode II crack segments nearly in the direction of applied shear stress. These segments nucleated at spatial geometrical irregularities of the precrack front generating fibrous patterns at fracture surfaces.",
  address="Elsevier",
  chapter="129023",
  doi="10.1016/j.ijfatigue.2016.02.042",
  institution="Elsevier",
  number="1",
  volume="92",
  year="2016",
  month="november",
  pages="470--477",
  publisher="Elsevier",
  type="journal article in Web of Science"
}