|
Vol.13, No1, 2013, pp. 9–16 |
|
ASSESSMENT OF PRESSURE VESSEL LOAD CAPACITY IN THE PRESENCE OF CRACKS Ljubica Milović1, Vesna Milošević-Mitić2, Zoran Radaković2, Nina Anđelić2, Blagoj Petrovski3 1)University of Belgrade, Faculty of Technology and Metallurgy, Belgrade, Serbia, acibulj@tmf.bg.ac.rs 2)University of Belgrade, Faculty of Mechanical Engineering, Belgrade, Serbia 3)University of Belgrade, Faculty of Mechanical Engineering – Innovation Centre, Belgrade, Serbia |
|
Abstract The paper illustrates the structural assessment of an investigated pressure vessel, made of low-alloyed high strength steel, with an external surface crack located on the shell wall. In order to assess the remaining strength and the resistance to stable crack growth, the J-integral is experimentally measured at operating temperature of –40°C. The compared crack driving force and material resistance to crack growth have determined the size of the zone of stable crack development, as well as the critical crack length. Also given is the pressure vessel calculation code by applying the theory of finite elements to linear-elastic material behaviour. Critical pressure values are calculated by analytical and numerical procedures and show good agreement. Keywords: J-integral, crack driving force, resistance curve, pressure vessel |
|
full article (841 kB)
|
