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Toribio, JCorresponding AuthorSanchezgalvez, VAuthorAstiz, MaAuthor

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STRESS INTENSIFICATION IN CRACKED SHANK OF TIGHTENED BOLT

Publicated to:Theoretical And Applied Fracture Mechanics. 15 (1): 85-97 - 1991-01-01 15(1), DOI: 10.1016/0167-8442(91)90007-7

Authors: TORIBIO, J; SANCHEZGALVEZ, V; ASTIZ, MA;

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Abstract

Defects or cracks in the shank of bolts can degrade their load carrying capacity. The ways with which loading and residual stress intensify the crack border stress field can be reflected through the stress intensity factor quantity as defined in the linear elastic fracture mechanics theory. Use is made of the stiffness derivative method where quarter-point singular finite elements are used in the numerical calculation. Improved accuracy is achieved by considering the displacements not only of the main nodes but also of those quarter-point nodes in plane normal and adjacent to the crack. Numerical results are obtained for a semi-elliptical shaped crack in the bolt shank owing to tension, bending, residual stress and stress caused by tightening of the bolt. Maximum value of the Mode I stress intensity factor K1 due to tension or bending could prevail either at the deepest point on the crack border or at the root of the shank where the crack border terminates depending on the aspect ratio of the ellipse. In general, K1 at the deepest point of crack penetration is larger than that at the free surface for tension and bending for a fixed crack depth with reference to the bolt diameter. Tightening of the bolt tends to increase K1 at the free surface if the crack depth is small. The opposite is obtained for deeper cracks. Assumed residual stress effect obtained from experimental data is found to have negligible influence on the stress intensity factor when compared with that arising from tensile load.

Keywords

Circular barConnectionsFractureIntensity factorsQuarter-point elementsShapeTip elements

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Bibliometric impact. Analysis of the contribution and dissemination channel

Independientemente del impacto esperado determinado por el canal de difusión, es importante destacar el impacto real observado de la propia aportación.

Según las diferentes agencias de indexación, el número de citas acumuladas por esta publicación hasta la fecha 2025-06-03:

  • WoS: 6
  • Scopus: 10
  • OpenCitations: 11

Impact and social visibility

From the perspective of influence or social adoption, and based on metrics associated with mentions and interactions provided by agencies specializing in calculating the so-called "Alternative or Social Metrics," we can highlight as of 2025-06-03:

  • The use of this contribution in bookmarks, code forks, additions to favorite lists for recurrent reading, as well as general views, indicates that someone is using the publication as a basis for their current work. This may be a notable indicator of future more formal and academic citations. This claim is supported by the result of the "Capture" indicator, which yields a total of: 6 (PlumX).

Leadership analysis of institutional authors

There is a significant leadership presence as some of the institution’s authors appear as the first or last signer, detailed as follows: First Author (TORIBIO PEREZ, JOSE IGNACIO) and Last Author (ASTIZ SUAREZ, MIGUEL ANGEL).

the author responsible for correspondence tasks has been TORIBIO PEREZ, JOSE IGNACIO.