Dynamic Finite Element Modeling of the Effects of Size on the Upper Shelf Energy of Pressure Vessel Steels


Dynamic finite element modeling (FEM) of the fracture behavior of fatigue-precracked Charpy specimens was performed to determine the effect of single variable changes in ligament size, width, span, and thickness on the upper shelf energy. A tensile fracture-strain based method for modeling crack initiation and propagation was used. It was found that the upper shelf energy of precracked specimens (USEp) is proportional to bn, where b is ligament size and n varies from about 1.6 for subsize to 1.9 for full size specimens. The USED was found to be proportional to (width)2.5 . The dependence on span was found to be non-linear. The dependence on thickness was found to be linear for all cases studied. Some of the data from the FEM analysis were compared with experimental data and were found to be in reasonable agreement.

Meeting Name

JIM '95 Fall Annual Meeting (117th) on lattice Defects and Radiation Induced Phenomena


Nuclear Engineering and Radiation Science

International Standard Serial Number (ISSN)


Document Type

Article - Conference proceedings

Document Version


File Type





© 1996 Elsevier, All rights reserved.

Publication Date

01 Jan 1996