Revisiting the third Sandia Fracture Challenge: a bond-associated, semi-Lagrangian peridynamic approach to modeling large deformation and ductile fracture

2020 ◽  
Vol 224 (2) ◽  
pp. 261-267
Author(s):  
Masoud Behzadinasab ◽  
John T. Foster
Keyword(s):  
Ductile Fracture ◽  
Large Deformation ◽  
The Third

Ductile Fracture Property of Structural Steels With a Surface Flaw Under Large Deformation

2002 ◽  
Author(s):  
Satoshi Igi ◽  
Hiroyuki Sumi ◽  
Masayoshi Kurihara
Keyword(s):  
Ductile Fracture ◽  
Large Deformation ◽  
Deformation Behavior ◽  
Shape Change ◽  
Three Dimensional ◽  
Tensile Tests ◽  
Surface Flaw ◽  
Stress Strain ◽  
Crack Shape ◽  
Critical Flaw

Tensile tests using plate specimens with a surface flaw were conducted in order to study the large deformation behavior of steels with a flaw. Steels prepared for examination had tensile strengths of 470–490MPa with different stress-strain relationships. The strain distribution during loading and the maximum strain at fracture were measured in order to investigate the influence of stress-strain properties on ductile fracture. The crack shape changes during ductile crack growth were also examined and compared with empirical formulae for estimating fatigue crack shape change. In order to assess test results, three dimensional elastoplastic finite element analyses were carried out which included detailed analysis of the influence of stress-strain properties on deformation behavior. In addition, a simplified analytical model to estimate fracture strain and critical flaw size was proposed using the stress-strain relationship of Swift’s equation. The results from the model show fairly good agreement with experimental results.

scholarly journals The third Sandia Fracture Challenge: deterministic and probabilistic modeling of ductile fracture of additively-manufactured material

2019 ◽  
Vol 218 (1-2) ◽  
pp. 209-229 ◽  
Author(s):  
Thomas Tancogne-Dejean ◽  
Maysam B. Gorji ◽  
Keunhwan Pack ◽  
Christian C. Roth
Keyword(s):  
Ductile Fracture ◽  
Probabilistic Modeling ◽  
The Third

Ductile Fracture Simulation of a Pipe of Steam Generator in PWR

2013 ◽  
Author(s):  
Yuuki Miyajima ◽  
Masanori Kikuchi ◽  
Akiyuki Takahashi
Keyword(s):  
Ductile Fracture ◽  
Large Deformation ◽  
Steam Generator ◽  
High Speed ◽  
Fracture Process ◽  
Burst Fracture ◽  
Final Fracture ◽  
Fracture Simulation ◽  
Inner Pressure ◽  
Crack Problems

Ductile fracture of steam generator pipes may occur due to inner pressure. The final fracture process by inner pressure occurs as a burst of a pipe, and ductile high speed crack growth occurs with large deformation of the structure. For the simulation of such fracture process, Gurson’s yield function is used as a constitutive equation, and large deformation theory is employed. As the simulation is conducted by load control condition, it is difficult to simulate burst phenomenon. Final fracture condition is discussed and finally crack opening displacement is chosen as burst fracture criterion. Fracture simulations of a pipe with multiple through cracks are conducted by changing distances between two crack tips. Burst loads are evaluated, and they are compared with estimated values by Maintenance rules. Surface crack problems are also simulated. Burst loads are also compared with results by limit load analysis method. Conservativeness of conventional evaluation methods are studied and discussed.

scholarly journals The third Sandia fracture challenge: predictions of ductile fracture in additively manufactured metal

2019 ◽  
Vol 218 (1-2) ◽  
pp. 5-61 ◽  
Author(s):  
Sharlotte L. B. Kramer ◽  
Amanda Jones ◽  
Ahmed Mostafa ◽  
Babak Ravaji ◽  
Thomas Tancogne-Dejean ◽  
...  
Keyword(s):  
Ductile Fracture ◽  
The Third

Ductile Fracture Evaluation of Welded Joints With a Surface Flaw Under Large Deformation

2005 ◽  
Author(s):  
Satoshi Igi ◽  
Takahiro Kubo ◽  
Masayoshi Kurihara
Keyword(s):  
Ductile Fracture ◽  
Large Deformation ◽  
Analytical Model ◽  
Welded Joint ◽  
Three Dimensional ◽  
Base Material ◽  
Tensile Tests ◽  
Surface Flaw ◽  
Stress Strain ◽  
Joint Specimen

Tensile tests using welded joint specimens with a surface flaw were conducted in order to study the large deformation behavior and ductile fracture of welded structural component with a flaw. Two types of 490MPa class steel plates with different yield strength are prepared for this study. The surface flaw was introduced at the center of welded metal of welded joint specimen. Strain distribution during loading and the maximum strain at ductile fracture of specimen were measured in order to investigate the influence of stress-strain properties on ductile fracture behavior of the welded joint. Three dimensional elastoplastic finite element analyses were also carried out by using the welded joint specimen models in order to calculate the detailed stress and strain distributions around notch tip. In addition, a simplified analytical model to estimate fracture strain and critical flaw size of the welded joint was proposed using the stress-strain relationship combination between base material and welded metal by Swift’s equation. The results from the analytical model show fairly good agreement with experimental results.

Multi‐field formulation of large deformation ductile fracture

PAMM ◽  
2018 ◽  
Vol 18 (1) ◽  
Author(s):  
Maik Dittmann ◽  
Christian Hesch ◽  
Jonathan Schulte ◽  
Fadi Aldakheel
Keyword(s):  
Ductile Fracture ◽  
Large Deformation

Progress report on 21-cm observations at low latitude between longitudes (l 11) 0° and 66°

1967 ◽  
Vol 31 ◽  
pp. 177-179
Author(s):  
W. W. Shane
Keyword(s):  
Preliminary Report ◽  
Progress Report ◽  
Galactic Centre ◽  
Low Latitude ◽  
The Third ◽  
Introductory Lecture ◽  
Centre Region

In the course of several 21-cm observing programmes being carried out by the Leiden Observatory with the 25-meter telescope at Dwingeloo, a fairly complete, though inhomogeneous, survey of the regionl11= 0° to 66° at low galactic latitudes is becoming available. The essential data on this survey are presented in Table 1. Oort (1967) has given a preliminary report on the first and third investigations. The third is discussed briefly by Kerr in his introductory lecture on the galactic centre region (Paper 42). Burton (1966) has published provisional results of the fifth investigation, and I have discussed the sixth in Paper 19. All of the observations listed in the table have been completed, but we plan to extend investigation 3 to a much finer grid of positions.

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