3-D Finite Element Modeling of Ductile Crack Growth in Thin Aluminum Materials

2008 ◽  
pp. 85-85-17
Author(s):  
AS Gullerud ◽  
RH Dodds ◽  
RW Hampton ◽  
DS Dawicke
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Crack Growth ◽  
Ductile Crack ◽  
Element Modeling ◽  
Ductile Crack Growth ◽  
Thin Aluminum

Numerical Simulation of Dynamic Ductile Fracture Propagation Using Cohesive Zone Modeling

2008 ◽  
Author(s):  
Do-Jun Shim ◽  
Gery Wilkowski ◽  
David Rudland ◽  
Brian Rothwell ◽  
James Merritt
Keyword(s):  
Finite Element ◽  
Crack Propagation ◽  
Crack Growth ◽  
Growth Model ◽  
Cohesive Zone ◽  
Zone Model ◽  
Pipe Material ◽  
Ductile Crack ◽  
Ductile Crack Growth ◽  
Crack Growth Model

This paper presents the development of a dynamic ductile crack growth model to simulate an axially running crack in a pipe by finite element analyses. The model was developed using the finite element (FE) program ABAQUS/Explicit. To simulate the ductile crack propagation, a cohesive zone model was employed. Moreover, the interaction between the gas decompression and the structural deformation was simulated by using an approximate three-dimensional pressure decay relationship from experimental results. The dynamic ductile crack growth model was employed to simulate 152.4 mm (6-inch) diameter pipe tests, where the measured fracture speed was used to calibrate the cohesive model parameters. From the simulation, the CTOA values were calculated during the dynamic ductile crack propagation. In order to validate the calculated CTOA value, drop-weight tear test (DWTT) experiments were conducted for the pipe material, where the CTOA was measured with high-speed video during the impact test. The calculated and measured CTOA values showed reasonable agreement. Finally, the developed model was employed to investigate the effect of pipe diameter on fracture speed for small-diameter pipes.

Extended finite element modeling of 3D dynamic crack growth under impact loading

2018 ◽  
Vol 151 ◽  
pp. 1-17 ◽  
Author(s):  
Thomas Elguedj ◽  
Romains Pelée de Saint Maurice ◽  
Alain Combescure ◽  
Vincent Faucher ◽  
Benoit Prabel
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Crack Growth ◽  
Impact Loading ◽  
Dynamic Crack ◽  
Extended Finite Element ◽  
Dynamic Crack Growth ◽  
Element Modeling
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