...Takehisa Yamada; Mitsuru Ohata This study aims to propose the damage model based on of the mechanism for ductile fracture related to void growth and to confirm the applicability of the proposed model to ductile crack growth simulation for steel. To figure out void growth behavior, elastoplastic...

... pipes has been developed by conducting nonlinear parametric analysis followed by nonlinear regression analysis. First, our previously validated extended finite element method (XFEM) model was used to demonstrate the applicability of the XFEM in simulating full-scale ductile fracture response...

... condition but also the three-dimensional nature of the stress field considerably affects the ductile fracture toughness. Moreover, parallel finite element (FE) simulation of experiments were conducted and a hybrid experimental–numerical approach was used to calibrate the Mohr–Coulomb fracture criterion...

... with the maximum void volume fraction matches well with that of the initiation of ductile fracture as observed in the experiments. laser weld heat affected zone necking ductile fracture shear fracture Laser welding has been widely used in the industry because of the advantages such as narrow heat...

... providing low crack tip constraint (as manifested by the negative values of Q ave in Fig. 6 ) thereby causing ductile fracture to become the prone failure mode. Moreover, code restrictions ( 1 ) imposed on specifying sufficient ductility and strain hardening capacity of both the line pipe...

... 17 09 2009 14 07 2010 04 04 2011 04 04 2011 ductile fracture fracture toughness pipelines plasticity steel tensile strength welding The reel-lay method illustrated in Fig. 1 is a cost efficient alternative to the S-lay and J-lay methods ( 1 ) for installation...

... of stress-strain relations obtained by numerical analysis. Consideration is given below to the ductile-to-brittle transition behavior of undermatched joints using the stress and strain values under the same conditions indicated above. Both cleavage and ductile fractures are initiated from inside...

... strength ductile fracture failure (mechanical) failure analysis pipelines plastic deformation 14 04 2010 20 07 2010 20 01 2011 20 01 2011 2011 American Society of Mechanical Engineers ...

... as ductile fracture (strain controlled type). Three-dimensional finite element-analyses are conducted. It was found that biaxial loading has a significant effect on the stress fields of through-thickness crack; the near-crack-tip stress is elevated to a large extent by biaxial loading. By contrast...

...-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...

... on both the stress and strain state, and can be effectively predicted using the continuum damage models incorporating with the stress state effect. 30 01 2008 02 09 2008 20 04 2009 brittle fracture cracks ductile fracture ductile-brittle transition finite element analysis...

... since in each case the predicted residual stresses at the center of the full-scale and quarter-scale plates were matched to the measured values before the insertion of the crack. It is well known that thickness has a marked effect on ductile fracture toughness, with the apparent toughness increasing...

... the CTOD toughness and the stress constraint, the prediction results given in this section are for demonstration and for consistency check, and are not considered a full validation of the relationship itself. Two types of simulations using CRACK3D are performed. digital simulation ductile fracture...

... methods ductile-brittle transition brittle fracture ductile fracture probability pipelines natural gas technology stress corrosion cracking In natural gas pipelines, there are many events that could lead to the initiation of an axial through-wall defect. For instance, stress corrosion...

...Y. Kim; Y. J. Chao; M. J. Pechersky; M. J. Morgan Elastic-plastic crack front fields in arc-shaped tension specimens (C-specimens) were analyzed by a three-dimensional finite element method. The effect of side grooves on the ductile fracture behavior was investigated by studying the J-integral...