THICKNESS EFFECT ON CRACK TIP DEFORMATION AT FRACTURE

The crack tip deformation at the onset of surface crack growth for four single edge cracked specimens having four different thicknesses were studied. The specimens were made of the ductile and tough HY-80 steel. The thickness contraction in the crack tip region and the tensile strain in the direction of load were measured. The crack tip necking-in acts like a notch. The depths, the root radii, and the angle changes of the nicking-in notches were measured. The results indicated that the near tip strain can be used as a fracture criterion of ductile and tough materials. It was also found that the fracture strengths of the cracked specimens can be correlated with the tensile ductilities measured with Clausing specimens.

• Corporate Authors:

  Syracuse University

  Department of Chemical Engineering and Materials Science
  Syracuse, NY  United States  13210
• Authors:
  • Ke, J S
  • Liu, Han-Wen
• Publication Date: 1974-9

Media Info

• Features: References;
• Pagination: 21 p.

Subject/Index Terms

• TRT Terms: Cracking; Ductility; Fracture mechanics; Measurement
• Uncontrolled Terms: Crack propagation
• Old TRIS Terms: Crack opening measurement
• Subject Areas: Marine Transportation; Materials;

Filing Info

• Accession Number: 00072523
• Record Type: Publication
• Source Agency: Ship Structure Committee
• Report/Paper Numbers: AMMRC CTR 74-57 Final Rpt.
• Contract Numbers: DAAG46-73-C-0209
• Files: TRIS
• Created Date: Dec 19 1974 12:00AM