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Computational Mechanics

, Volume 62, Issue 3, pp 393–409 | Cite as

Construction of a rapid simulation design tool for thermal responses to laser-induced feature patterns

  • T. I. Zohdi
Original Paper
  • 133 Downloads

Abstract

There are many emerging manufacturing processes whereby surface structures are processed by spatially laser patterning of an entire feature at a time, as opposed to rastering a small beam. It is important to ascertain and ideally control the induced thermal fields underneath the pattern. This paper develops a computational framework to rapidly evaluate the induced thermal fields due to application of a laser on the surface. The aggregate thermal fields are efficiently computed by superposing individual “beamlet” heat-kernel solutions, based on Green’s functions, to form complex surface patterns. The utility of the approach is that laser-process designers can efficiently compute the results of selecting various system parameters, such as spatially-variable laser intensity within a pattern. This allows one to rapidly compute system parameter studies needed in the manufacturing of new products. Included are:
  • A computational framework to compute the time-transient thermal response from a spatio-temporally non-uniform laser beam in an arbitrary spatial pattern and

  • An analysis of how the results can be used to track the evolution of the thermal gradients and their correlation to thermal stresses.

Three-dimensional examples are provided to illustrate the technique. The utility of the approach is that an analyst can efficiently ascertain a large number of laser-input scenarios without resorting to computationally-intensive numerical procedures, such the Finite Element Method.

Keywords

Laser heat-transfer manufacturing 

Notes

Acknowledgements

The author acknowledges generous support from Siemens Grant 85702-23845-44-EKZOH-EEZT85702X, under program manager Dr. Marco Brunelli.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2017

Authors and Affiliations

  1. 1.Department of Mechanical EngineeringUniversity of CaliforniaBerkeleyUSA

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