Finite element analysis (FEA) eliminates the assumption of non-constant material properties, and allows the use of non-axisymmetric, three-dimensional heat sources such as ellipsoidal and double ellipsoidal distributions.

Aug 1, 2017 · The double-ellipsoidal heat source has been shown to accurately represent the heat power density from an electric arc traversing across the surface of a flat plate.

SYSWELD, a volumetric heat source in the shape of double ellipsoid, which was first proposed by Goldak (1984), is employed for the simulation of welding processes like MIG, TIG, etc, as illus...

Jul 10, 2014 · In this paper, a neural-network programme based on the Levenberg–Marquardt algorithm is developed to predict the parameters of Goldak's double-ellipsoidal heat source model.

Jan 3, 2019 · The double-ellipsoidal heat source model (DEHSM) [1], expressed by Eq. (1), utilizes two ellipsoidal heat sources (Fig. 1) to reflect the characteristics of steep and gentle welding temperature gradients in the front and rear of the heat source, respectively.

May 1, 2022 · The double-ellipsoidal heat source concept, established by Goldak, has been extensively employed to represent the energy distribution in a broad range of arc welding simulation processes. However, the Goldak's parameters need to be exactly and efficiently defined for accurate arc welding simulation.

A method to estimate the parameters of a double ellipsoidal heat source in motion is proposed. An algorithm has been implemented based on the combination of analytical formulation, experimental data, and numerical simulation.

Jul 25, 2024 · Goldak’s ellipsoidal heat source model is widely accepted in laser powder bed fusion (LPBF) process simulations. The model is dependent on three inherent flux distribution parameters and absorptivity which need to be calibrated before application.

Mar 1, 2004 · This work describes the detailed derivation of the analytical approximate solution for a double ellipsoidal density heat source in finite thick plate.

Double ellipsoid volumetric source heat with function path. Description. This is a material for generating a moving heat source with an ellipsoidal shape that follows a user-defined path, with the volumetric heat source being defined as follows: where: - is the power - is the efficiency - is the scaling factor