Finite-element Procedure for Calculating the Three-dimensional Inelastic Bowing of Fuel Rods (AWBA Development Program).
Finite-element Procedure for Calculating the Three-dimensional Inelastic Bowing of Fuel Rods (AWBA Development Program).

Author:

Publisher:

Published: 1982

Total Pages:

ISBN-13:

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An incremental finite element procedure is developed for calculating the in-pile lateral bowing of nuclear fuel rods. The fuel rod is modeled as a viscoelastic beam whose material properties are derived as perturbations of the results of an axisymmetric stress analysis of the fuel rod. The effects which are taken into account in calculating the rod's lateral bowing include: (a) lateral, axial, and rotational motions and forces at the rod supports, (b) transverse gradients of temperature, fast-neutron flux, and fissioning rate, and (c) cladding circumferential wall thickness variation. The procedure developed in this report could be used to form the basis for a computer program to calculate the time-dependent bowing as a function of the fuel rod's operational and environmental history.

The Mhost Finite Element Program
The Mhost Finite Element Program

Author: National Aeronautics and Space Administration (NASA)

Publisher: Createspace Independent Publishing Platform

Published: 2018-08-04

Total Pages: 218

ISBN-13: 9781724687500

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The internal structure is discussed of the MHOST finite element program designed for 3-D inelastic analysis of gas turbine hot section components. The computer code is the first implementation of the mixed iterative solution strategy for improved efficiency and accuracy over the conventional finite element method. The control structure of the program is covered along with the data storage scheme and the memory allocation procedure and the file handling facilities including the read and/or write sequences. Nakazawa, Shohei Unspecified Center NASA-CR-182236, NAS 1.26:182236, FEF/PD/1102/89-VOL-3 NAS3-23697; RTOP 533-04-11...