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.
S. E. Sidener et al., "Dynamic Finite Element Modeling of the Effects of Size on the Upper Shelf Energy of Pressure Vessel Steels," Journal of Nuclear Materials, Elsevier, Jan 1996.
The definitive version is available at http://dx.doi.org/10.1016/S0022-3115(96)00483-7
JIM '95 Fall Annual Meeting (117th) on lattice Defects and Radiation Induced Phenomena
Mining and Nuclear Engineering
Article - Conference proceedings
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