Elastic-plastic analysis of crack in thermally-loaded structures

✍ Scribed by S. Aoki; K. Kishimoto; M. Sakata

• Publisher: Elsevier Science
• Year: 1982
• Tongue: English
• Weight: 630 KB
• Volume: 16
• Category: Article
• ISSN: 0013-7944
• DOI: 10.1016/0013-7944(82)90118-7

✦ Synopsis

The stress or strain field near a crack-tip in a thermally-loaded structure has the HRR singularity and its amplitude is determined by the path-independent j-integral. The j-integral is an extension of Rice's f-integral and is related to the energy-release rate in thermal stress held. The finite element calculations have been carried out for a plate and a cylinder subjected to transient thermal loading with the temperature dependence of material properties taken into consideration. The computed J-values are almost pathindependent as predicted theoretically, In an elastic problem, the stress in~ns~ty factor estimated from the .f-integral agrees well with the analytical one. it is concluded that the j-integral has a potential ability to evaluate the integrity of structures such as nuclear pressure vessles that are subjected to thermal loading as well as mechanical one.