A continuum damage model for ductile fracture of weld heat affected zone

✍ Scribed by Tiejun Wang

• Publisher: Elsevier Science
• Year: 1991
• Tongue: English
• Weight: 540 KB
• Volume: 40
• Category: Article
• ISSN: 0013-7944
• DOI: 10.1016/0013-7944(91)90172-w

✦ Synopsis

Abatraet-In this paper, the ductile plastic damage behaviour of weld heat alkcted zone (HAZ) is studied by use of continuum dama mechanics (CDM). Based on a continumn damage variable, D, the effective stress concept and tpf" e thermodynamics, a general continuum damage model for isotropic ductile fracture is derived from a new dissipation potential chosen by the author herein. A comparison between the damage model and experimental results is presented and a good agreement is found. The model is also used to analyse the ductile plastic damage evolution in thermally simulated welding coarse-grained HA2 of a low alloy steel. The elfects of stress triaxiality on plastic damage evolution and on ductile fracture of the coarse-grained HAZ are discussed.