| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5013756 | Engineering Fracture Mechanics | 2017 | 56 Pages |
Abstract
Ductile fracture initiation with consideration of strain concentration and stress triaxiality near axial crack fronts in pressure tube (PT) specimens of hydrided irradiated Zr-2.5Nb materials with split circumferential hydrides is examined by three-dimensional finite element analyses with submodeling. For a PT specimen with split circumferential hydrides, strain concentration occurs in the middle of the ligaments ahead of the crack front. The computational results suggest that only 60-70% of the internal pressure for fracture initiation of an unhydrided irradiated PT specimen is needed to fracture a hydrided irradiated PT specimen with many split circumferential hydrides along the crack front.
Related Topics
Physical Sciences and Engineering
Engineering
Mechanical Engineering
Authors
Shin-Jang Sung, Jwo Pan, Poh-Sang Lam, Douglas A. Scarth,