Approximate Determination of J Integral for Cracked Structures | Chapter 4 | Recent Trends in Chemical and Material Sciences Vol. 9

The Js procedure of the French RCC-MR construction code, here referred to as the FC method, is contrasted with the GSM method for the assessment of the J integral of cracked components subjected to uniform normal stress, for centre cracked plates, single edge cracked plates, double edge cracked plates, and longitudinally cracked pipe produced from X70 steel. The EPRI approach was used to determine the "reference" values for the J integral for broken plates. The study's major goal was to demonstrate that the GSM approach can accurately forecast the J integral for broken plates and pipes. Although the GSM technique findings are often a little more cautious than those anticipated by the FC method, a comparison of outcomes produced using the GSM and FC methods demonstrates that both approaches offer comparable results. When compared to the "reference" values of the J integral, both methodologies produce conservative findings for the majority of fracture configurations, while estimates for fractures with a relative length of less than 1/8 were not found to be as conservative. The two methods were also used to forecast external longitudinal semielliptical part-through fractures in X70 steel pipe. The magnitudes of the anticipated burst pressures were remarkably comparable to one another and conservative when compared to FEM calculations and empirically determined burst pressures.

Author(s) Details:

Lubomir Gajdos,

Institute of Theoretical and Applied Mechanics of the Czech Academy of Sciences, v. v. i. Prosecká 809/76, 190 00 Prague, Czech Republic.

Martin Sperl,

Institute of Theoretical and Applied Mechanics of the Czech Academy of Sciences, v. v. i. Prosecká 809/76, 190 00 Prague, Czech Republic.

Jiri Kuzelka,

Faculty of Mechanical Engineering, Czech Technical University in Prague, Technická 4,166 07 Prague, Czech Republic.

Jan Kec,

SVUM a.s., Tovarni 2053, 250 88 Celakovice, Czech Republic

Please see the link here: https://stm.bookpi.org/RTCAMS-V9/article/view/7377