FACTORS OF STRESS INTENSITY AND CRACK PROPAGATION FORCE IN THE CASE OF A TRANSVERSE CRACK IN A CYLINDRICAL WIRE

FACTEURS D'INTENSITE DE CONTRAINTE ET FORCE D'EXTENSION DE FISSURE DANS LE CAS D'UNE FISSURE TRANSVERSALE DANS UN FIL CYLINDRIQUE

This article describes the calculation of failure parameters of a transverse surface crack for a given stress when the sample is subjected to tension, pure bending or uniform lateral loading. Steel is assimilated to an elastic medium with a stress intensity factor ki varying along the crack. Parameters ki and g (crack propagation force) were calculated for several fissure shapes and sizes using a calculation program based on the method of integral equations. For the determination of the two parameters either the displacements or the potential energy were used, and the convergence of the two methods was verified. Lastly the propagation of the fault was studied by means of two geometric parameters and the maximum rate of variation in potential energy associated to a fatigue law as a function of the mode of stress and of the initial geometry of the cracks. These calculations were verified in the case of tension, using 12 mm diameter samples with various notches. (TRRL)

• Corporate Authors:

  Laboratoire Central des Ponts et Chausees (LCPC)

  Boulevard Lefebvre 58
  Paris Cedex 15,   France  F-75732
• Authors:
  • Athanassiadis, A
  • Boissenot, J M
  • Brevet, P
  • Francois, D
  • RAHARINAIVO, A
• Publication Date: 1980-1-2

Language

• French

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: p. 73-78
• Serial:
  • Bulletin de Liaison des Lab des Ponts et Chaussees
  • Issue Number: 105
  • Publisher: Laboratoire Central des Ponts et Chausees (LCPC)

Subject/Index Terms

• TRT Terms: Bars (Building materials); Bending; Calculation; Conferences; Cracking; Deflection; Failure; Fatigue (Mechanics); Geometry; Loads; Shape; Size; Stability (Mechanics); Steel; Strength of materials; Stresses; Tension; Transverse cracking; Wire
• Uncontrolled Terms: Crack propagation; Distributed loading; Increase; Side; Transverse
• ITRD Terms: 3461: Bar; 6464: Calculation; 8525: Conference; 5211: Cracking; 5586: Deflection; 9014: Dimension; 5597: Distributed loading; 5520: Failure; 9032: Increase; 9073: Shape; 9074: Side; 5930: Stability; 4542: Steel; 5544: Strength (mater); 5502: Tension; 9081: Transverse; 4520: Wire
• Subject Areas: Geotechnology; Highways; Materials; I34: Steels and Metals;

Filing Info

• Accession Number: 00325686
• Record Type: Publication
• Source Agency: Laboratoire Central des Ponts et Chausees (LCPC)
• Files: ITRD, TRIS
• Created Date: Sep 16 1981 12:00AM