Fatigue crack growth simulation in particulate-reinforced composites by the equivalent inclusion method and distributed dislocation method

2018 ◽  
Vol 89 (4) ◽  
pp. 737-754
Author(s):  
Jiong Zhang ◽  
Zhan Qu ◽  
Weidong Liu ◽  
Li Zhou ◽  
Liankun Wang
Keyword(s):  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Reinforced Composites ◽  
Growth Simulation ◽  
Equivalent Inclusion Method ◽  
Crack Growth Simulation ◽  
Equivalent Inclusion ◽  
Distributed Dislocation ◽  
Particulate Reinforced Composites ◽  
Particulate Reinforced

Ductile Phase Toughening of MoSi2: Effect of Reinforcement Morphology

1994 ◽  
Vol 350 ◽  
Author(s):  
Long-Ching Chen ◽  
Nedhal Bahtishi ◽  
Richard Lederich ◽  
Wolé Soboyejo
Keyword(s):  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Reinforced Composites ◽  
Ductile Phase ◽  
Reinforced Composite ◽  
Fine Fiber ◽  
Ductile Brittle Transition Temperature ◽  
Particulate Reinforced Composites ◽  
Particulate Reinforced

AbstractThe effects of ductile reinforcement morphology on the mechanical behavior of MoSi2 reinforced with 20 vol.% Nb are presented. While all the composites exhibit improved fracture toughness relative to the monolithic MoSi2, the most significant improvement is obtained in the composite with laminate reinforcement, followed by coarse fiber, fine fiber and particulate reinforcements. Bend strength measurements indicate a ductile-brittle-transition-temperature of ∼1250°C, and highlight the attractive properties of laminate reinforced composite. Preliminary studies of room temperature fatigue crack growth in particulate reinforced composites show a stable fatigue crack growth, which is not achieved in monolithic MoSi2. Possible ways of achieving a better combination of mechanical properties are also discussed.

Fatigue Crack Growth Analysis of Interacting Subsurface Cracks Using S-Version FEM

2016 ◽  
Author(s):  
Ayaka Suzuki ◽  
Akiyuki Takahashi ◽  
Masanori Kikuchi
Keyword(s):  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Fem Simulation ◽  
Crack Growth Behavior ◽  
Surface Cracks ◽  
Direct Simulation ◽  
Growth Simulation ◽  
Subsurface Cracks ◽  
Crack Growth Simulation

Fatigue crack growth simulation using the s-version finite element method (FEM) is presented. Two subsurface cracks are aligned in the depth direction of a specimen, and is subjected to a cyclic tension-tension loading. The fatigue crack growth behavior of the cracks is directly simulated using our automatic fatigue crack growth simulation system with the s-version FEM. Along with the direct simulation, proximity rules for crack combinations and surface cracks are used in the s-version FEM simulation. The numerical results with and without the application of the proximity rules are compared to make a validation of the application of the proximity rules in the evaluation of fatigue crack growth behaviors and residual fatigue life. The results clearly illustrate that the proximity rules accelerate the fatigue crack growth rate, and provide us with a substantially conservative evaluation. Finally, the proximity rules are slightly modified for making better approximation of combining and surface cracks. It can be found that the new proximity rules are able to give a fatigue crack growth evaluation closer to the direct simulation results.

scholarly journals Near threshold fatigue crack growth simulation

2003 ◽  
Vol 2003 (0) ◽  
pp. 307-308
Author(s):  
Toshiyuki MESHII ◽  
Kenichi ISHIHARA ◽  
Katsuhiko WATANABE
Keyword(s):  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Growth Simulation ◽  
Crack Growth Simulation ◽  
Near Threshold
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