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- W585529075 abstract "We consider the problem of finding the heat distribution and the shape of the liquid fraction during laser welding of a thick steel plate using the finite volume CFD package PHYSICA. Since the shape of the keyhole is not known in advance, the following two-step approach to handling this problem has been employed. In the first stage, we determine the geometry of the keyhole for the steady-state case and form an appropriate mesh that includes both the workpiece and the keyhole. In the second stage, we impose the boundary conditions by assigning temperature to the walls of the keyhole and find the heat distribution and the shape of the liquid fraction for a given welding speed and material properties. We construct a fairly accurate approximation of the keyhole as a sequence of include sliced cones. A formula for finding the initial radius of the keyhole is derived by determining the radius of the vaporisation isotherm for the line heat source. We report on the results of a series of computational experiments for various heat input values and welding velocities." @default.
- W585529075 created "2016-06-24" @default.
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- W585529075 date "2002-07-01" @default.
- W585529075 modified "2023-09-23" @default.
- W585529075 title "Characterisation of weldpool shapes in the laser welding of thick plates" @default.
- W585529075 hasPublicationYear "2002" @default.
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