A numerical and experimental investigation on the use of J-integral

✍ Scribed by A.S. Kobayashi; S.T. Chiu; R. Beeuwkes

• Publisher: Elsevier Science
• Year: 1973
• Tongue: English
• Weight: 907 KB
• Volume: 5
• Category: Article
• ISSN: 0013-7944
• DOI: 10.1016/0013-7944(73)90024-6

✦ Synopsis

Abatract-Finite element analysis was used to determine numerically Rice's J-integral values in centrally notched plates of 43.40 steel. These numerical values were compared with corresponding J-integral values using Dugdale made1 and antiplane strain model with a power law hatdening of n = 0.3. J-integral was also computed for a crack extendii into its own plastic yield region under constant loading. For increasing level of loading, u, the rate of increase in J-integral decreases and J-integral remains almost constant at o/rus = 1 under such crack extension.

A limited number of fracture tests were conducted with centrally notched 4340 steel specimens heat treated to yield strength kvels of 150,180,2 10 and 240 ksi. Fracture data showed that the critical J-integral, calculated and measured, is insensitive to crack tip sharpmss for the lower strun@b 4340 ma&al and thus the J, fhcturc criteria appears suited in cotrelating fracture data.