Simulation of Stress-Corrosion Cracking by the Cohesive Model

Rainer Falkenberg; Wolfgang Brocks; Wolfgang Dietzel; Ingo Schneider

doi:10.4028/www.scientific.net/KEM.417-418.329

Paper Titles

Estimation of Crack Growth Life in Rail with a Squat Defect
p.313

Analysis of Hot Spots Evolution on Brake Disc Using High-Speed Infrared Camera
p.317

Linear-Elastic and Elastoplastic Mode II and III Crack Tip Stress-Strain Fields in Cylindrical Specimens with Circumferential Crack
p.321

Fatigue Resistance and Crack Initiation Mechanisms in High-Thickness Aircraft Al-Alloy and Steel Sheets after Water Jet Cutting
p.325

Simulation of Stress-Corrosion Cracking by the Cohesive Model
p.329

Fatigue Behaviour of a Stainless Steel Based on Energy Measurements
p.333

Investigating Sound Sources of Faulty Gear Units
p.337

Mechanical Properties of Aluminum Metal Matrix Composites
p.341

Experimental Evaluation of Corrosion Effect on Bond Between Steel and Concrete in Presence of Cyclic Action
p.345

HomeKey Engineering MaterialsKey Engineering Materials Vols. 417-418Simulation of Stress-Corrosion Cracking by the...

Simulation of Stress-Corrosion Cracking by the Cohesive Model

Abstract:

The effect of hydrogen on the mechanical behaviour is twofold: It affects the local yield stress and it accelerates material damage. On the other hand, the diffusion behaviour is influenced by the hydrostatic stress, the plastic deformation and the strain rate. This requires a coupled model of deformation, damage and diffusion. The deformation behaviour is described by von Mises plasticity with pure isotropic hardening, and crack extension is simulated by a cohesive zone model. The local hydrogen concentration, which is obtained from the diffusion analysis, causes a reduction of the cohesive strength. Crack extension in a C(T) specimen of a ferritic steel under hydrogen charging is simulated by fully coupled diffusion and mechanical finite element analyses with ABAQUS and the results are compared with test results.