Crack Tip Plasticity By Classic Dislocation Dynamics

Hiroomi Homma; Huu Nhan Tran

doi:10.4028/www.scientific.net/AMR.33-37.97

Paper Titles

Examination of the Optimal Local Model Size of Structure with a Surface Crack in the 3-D Local Hybrid Method
p.73

Probabilistic Fracture Mechanics Analysis for Optimization of High-Pressure Vessel Inspection
p.79

Study on the Stress Intensity Factor for Mixed Mode Surface Crack under Three Point Bending
p.85

Different Delamination Cracks during Fracture and Their Influences on the Fracture of X70 Pipeline Steel
p.91

Crack Tip Plasticity By Classic Dislocation Dynamics
p.97

Effective Use of Commercial FEM Software in 2-Dimentional Crack Problems
p.103

Fatigue Analysis for CNG Storage Gas Pressure Vessel Based on ANSYS
p.109

Uniaxial Ratchetting-Fatigue Interaction of Tempered 42CrMo Steel and its Failure Model
p.115

Effect of Size and Location of a Weld Defect on Fatigue Life for Argon-Arc Welded Titanium Alloy Joint
p.121

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Crack Tip Plasticity By Classic Dislocation Dynamics

Abstract:

Under very short pulse loads in range from 25 to 100 μs, crack tip plasticity a head of the crack tip in the mode I condition was investigated by discrete dislocation dynamics. The obtained dislocation array parameters such as the number of dislocations, dislocation distribution density, crack tip opening displacement and plastic zone size increase with the magnitude of stress intensity factor, KI and pulse durations. The numerical results were well compared with the experimental ones.