Extended Finite Element Simulation on Tensile, Fracture Toughness and Fatigue Crack Growth Behaviour of Additively Manufactured Ti6Al4V Alloy

2021 ◽  
pp. 103163
Author(s):  
Raviraj Verma ◽  
Pankaj Kumar ◽  
R. Jayaganthan ◽  
Himanshu Pathak
Keyword(s):  
Fracture Toughness ◽  
Finite Element ◽  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Tensile Fracture ◽  
Growth Behaviour ◽  
Extended Finite Element ◽  
Crack Growth Behaviour ◽  
Element Simulation

Flexural strength, fracture toughness and fatigue crack growth behaviour of chromium alloyed ?-base TiAl

1994 ◽  
Vol 29 (19) ◽  
pp. 5199-5206 ◽  
Author(s):  
R. Gnanamoorthy ◽  
Y. Mutoh ◽  
N. Masahashi ◽  
Y. Mizuhara ◽  
M. Matsuo
Keyword(s):  
Fracture Toughness ◽  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Flexural Strength ◽  
Crack Growth ◽  
Growth Behaviour ◽  
Crack Growth Behaviour

Study on Fatigue Crack Growth of Laser Melting Deposited 12CrNi2 Alloy Steel Based on XFEM

2021 ◽  
Vol 871 ◽  
pp. 46-52
Author(s):  
Cheng Hong Duan ◽  
Zhi Wei Weng ◽  
Xiang Peng Luo ◽  
Xiang Xiang Han ◽  
Ming Huang Zhao
Keyword(s):  
Finite Element ◽  
Fatigue Crack ◽  
Fatigue Life ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Alloy Steel ◽  
Initial Crack ◽  
Growth Behaviour ◽  
Laser Melting ◽  
Crack Growth Behaviour

Based on the Paris model of fatigue crack growth theory, the fatigue crack growth behaviour of Center Crack Tension (CCT) specimens of laser melting deposited 12CrNi2 alloy steel is studied by extended finite element method (XFEM). The crack growth rules and fatigue life are analyzed by experiment and finite element simulation. The experimental results are in good agreement with the finite element results, which verifies the accuracy of XFEM method to simulate the fatigue crack growth behaviour of laser melting deposited 12CrNi2 alloy steel components. Based on this, the effects of initial crack direction and load amplitude on fatigue crack growth behaviour are discussed. The results indicate that even if the initial crack direction is different, the crack will finally propagate in a direction perpendicular to the load. With the increase of the load amplitude, the fatigue life of the specimen with initial crack decreases exponentially.

Finite Element Simulation of Stable Fatigue Crack Growth Using Critical CTOD Determined by Preliminary Finite Element Analysis

2014 ◽  
Vol 891-892 ◽  
pp. 1675-1680
Author(s):  
Seok Jae Chu ◽  
Cong Hao Liu
Keyword(s):  
Finite Element ◽  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Finite Element Simulation ◽  
Crack Growth ◽  
Crack Tip ◽  
Stress Intensity Factor Range ◽  
Crack Tip Opening Displacement ◽  
Element Analysis ◽  
Element Simulation

Finite element simulation of stable fatigue crack growth using critical crack tip opening displacement (CTOD) was done. In the preliminary finite element simulation without crack growth, the critical CTOD was determined by monitoring the ratio between the displacement increments at the nodes above the crack tip and behind the crack tip in the neighborhood of the crack tip. The critical CTOD was determined as the vertical displacement at the node on the crack surface just behind the crack tip at the maximum ratio. In the main finite element simulation with crack growth, the crack growth rate with respect to the effective stress intensity factor range considering crack closure yielded more consistent result. The exponents m in the Paris law were determined.

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