A line input (LI) model has been developed, which makes the accurate modeling of powder
bed processes more computationally efficient. Goldak's ellipsoidal model has been used
extensively to model heat sources in additive manufacturing (AM), including lasers and
electron beams. To accurately model the motion of the heat source, the simulation time
increments must be small enough such that the source moves a distance smaller than its
radius over the course of each increment. When the source radius is small and its velocity is …

A line input model has been developed which makes the accurate modeling of powder bed
processes more computationally efficient. Goldak's ellipsoidal model has been used
extensively to model heat sources in additive manufacturing, including lasers and electron
beams. To accurately model the motion of the heat source, the simulation time increments
must be small enough such that the source moves a distance smaller than its radius over the
course of each increment. When the source radius is small and its velocity is large, a strict …