Axisymmetric laser welding of ceramics

Comparison of experimental and finite element results

J. W. Hirsch, L. G. Olson, Z. Nazir, Dennis R Alexander

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

In this paper, we compare experimental data for a laser spot weld on a ceramic to the solution from an adaptive finite element model of the system. Our focus is on validating the finite element model, which necessarily includes numerous simplifications. We assume an axisymmetric geometry and flow profile, with flat free surface. Buoyancy and surface tension drive the liquid motion in the molten ceramic pool beneath the laser, which is calculated using the axisymmetric forms of the continuity, momentum and energy equations. Latent heat, temperature-dependent material properties and radiation effects are all included in the formulation. These equations are solved with standard finite element techniques utilizing mesh relocation with a movement indicator based on solution gradients. Comparison with experimental data indicates that the numerical techniques used successfully predicted the depth and diameter of the actual ceramic weld pool.

Original languageEnglish (US)
Pages (from-to)465-484
Number of pages20
JournalOptics and Lasers in Engineering
Volume29
Issue number6
DOIs
StatePublished - Jan 1 1998

Fingerprint

laser welding
Laser beam welding
Welds
ceramics
Relocation
Lasers
Radiation effects
Latent heat
Buoyancy
spot welds
Surface tension
Molten materials
Materials properties
relocation
Momentum
continuity equation
latent heat
radiation effects
simplification
buoyancy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Mechanical Engineering
  • Electrical and Electronic Engineering

Cite this

Axisymmetric laser welding of ceramics : Comparison of experimental and finite element results. / Hirsch, J. W.; Olson, L. G.; Nazir, Z.; Alexander, Dennis R.

In: Optics and Lasers in Engineering, Vol. 29, No. 6, 01.01.1998, p. 465-484.

Research output: Contribution to journalArticle

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