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Computer Modeling of Heat Flow in Welds by J. Goldak; M. Bibby; J. Moore; R. House; B. Patel is a Engineering article available to read on EtoBox.

What is Computer Modeling of Heat Flow in Welds about?

This paper summarizes progress in the development of methods, models, and software for analyzing or simulating the flow of heat in welds as realistically and accurately as possible. First the fundamental equations for heat transfer are presented and then a formulation for a nonlinear transient finite element analysis (FEA) to solve them is described. Next the magnetohydrodynamics of the arc and the fluid mechanics of the weld pool are approximated by a flux or power density distribution selected to predict the temperature field as accurately as possible. To assess the accuracy of a model, the computed and experimentally determined fusion zone boundaries are compared. For arc welds, accurate results are obtained with a power density distribution in which surfaces of constant power density are ellipsoids and on radial lines the power density obeys a Gaussian distribution. Three dimensional, in-plane and cross-sectional kinematic models for heat flow are defined. Guidelines for spatial and time discretization are discussed. The FEA computed and experimentally measured temperature field, T(x, y, z, t), for several welding situations is used to demonstrate the effect of temperature depe

Who reads Computer Modeling of Heat Flow in Welds?

Author

J. Goldak; M. Bibby; J. Moore; R. House; B. Patel

Published

1986

Language

EN

Field

Engineering (Physical Sciences)