...Igor Orynyak; Vladyslav Marchenko; Roman Mazuryk; Andrii Oryniak There are dozens of formulas in literature and standards for residual strength calculation of the pressurized ductile pipes with axial rectangular defect. Their accuracy is usually characterized by the so-called “model error” notion...

...Igor Orynyak; Julia Bai; Roman Mazuryk The paper is devoted to elaboration of the analytical O-procedure for the limit load analysis of complex shaped axial defect in a pressurized pipe. It is based on the classical lower bound theorem of the theory of plasticity, and consists in construction...

... transition model for circumferential cracks in pipes. The model can be used for pipe subjected to axial tension, global bending, and combined tension and bending. Since the model introduces the concept of a nonidealized TWC for describing SC to TWC transition, the existing K I and COD solutions...

...Kunio Hasegawa; David Dvořák; Vratislav Mareš; Bohumir Strnadel; Yinsheng Li Fully plastic failure stresses for circumferentially surface-cracked pipes subjected to tensile loading can be estimated by means of limit load criteria based on the net-section stress approach. Limit load criteria...

...Hyeong-Yeon Lee; Min-Gu Won; Nam-Su Huh An integrated software platform of high-temperature design evaluation and defect assessment for a nuclear component and piping system subjected to high-temperature operation in creep regime has been developed. The program, called “HITEP_RCC-MRx,” is based...

... to diameter λ were analyzed by Eq. (25) , and the results are shown in Fig. 5 . The vertical axis represents the ratio of burst pressure of an eccentric pipe to that of a concentric pipe. One can clearly see from Fig. 5( a ) that the burst pressure ratio almost linearly decreases with the increase...

...S. Feli; M. E. Aalami Aaleagha; M. Foroutan; E. Borzabadi Farahani In this paper, a finite element simulation, based on abaqus software is presented for analyzing the temperature history and the residual stress states in multipass welds in stainless steel pipe. The uncoupled thermal–mechanical...

...-cracked pipe, indicate that the decomposition method developed provides accurate, convergent, and computationally efficient estimates of the probabilistic characteristics of the J -integral. 26 12 2008 06 06 2009 01 10 2009 cracks ductile fracture ductility elastoplasticity...

... ( 1998, LS-DYNA Theoretical Manual, Livermore Software Technology Corporation ), is employed to determine the HDPE pipe primary creep process using an effective numeric algorithm ( Whirley and Henshall, 1992, “Creep Deformation Structural Analysis Using an Efficient Numerical Algorithm,” Int. J. Numer...

...Roberto Brighenti A round pipe with an external longitudinal surface flaw is assumed to be subjected to different types of elementary hoop stress distributions acting perpendicular to the crack faces. The stress intensity factors (SIFs) along the crack front for such elementary cases are determined...