Analysis of HRR fields of surface cracks

✍ Scribed by M. Kikuchi

• Publisher: Springer Netherlands
• Year: 1992
• Tongue: English
• Weight: 534 KB
• Volume: 58
• Category: Article
• ISSN: 1573-2673
• DOI: 10.1007/bf00015620

✦ Synopsis

Two kinds of surface cracked specimens are numerically analyzed by the three dimensional elastic-plastic FEM. Near tip regions are divided into fine elements, and the stress and displacement fields at the crack tip are compared with HRR solutions.

At first, surface cracked specimens subjected to bending are analyzed by changing the aspect ratio and depth/ thickness ratio. The effect of the loading condition, crack shape and the crack depth on the stress and displacement fields are discussed. Then the pipe with surface crack subjected to bending is analyzed and the availability of the J-integral concept to the LBB analysis is discussed.

In every specimen, it is shown that in the regions very near to the crack tip, the displacement field is similar to HRR solutions of plane strain. In the outer regions, however, the stress and displacement fields depend strongly on the shape, thickness, and loading conditions.