An adaptive integration scheme for heat conduction in additive manufacturing

Stump, B.; Plotkowski, A.

doi:10.1016/j.apm.2019.07.008

Title: An adaptive integration scheme for heat conduction in additive manufacturing

Journal Article · Fri Nov 01 00:00:00 EDT 2019 · Applied Mathematical Modelling

DOI:https://doi.org/10.1016/j.apm.2019.07.008· OSTI ID:2204323

Stump, B.;

Solidification dynamics are important for determining final microstructure in additively manufactured parts. Recently, researchers have adopted semi-analytical approaches for predicting heat conduction effects at length and time scales not accessible to complex multi-physics numerical models. The present work focuses on improving a semi-analytical heat conduction model for additive manufacturing by designing an adaptive integration technique. The proposed scheme considers material properties, process conditions, and the inherent physical behavior of the transient heat conduction around both stationary and moving heat sources. Both the adaptive integration scheme and a technique for calculating only the points within the melt pools are described in detail. The full algorithm is then implemented and compared against a simple Riemann sum integration scheme for a variety of cases that highlight process and material variations relevant to additive manufacturing. Lastly, the new scheme is shown to have significant improvements in computational efficiency, solution accuracy, and usability.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Electricity (OE)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 2204323

Alternate ID(s):: OSTI ID: 1542676; OSTI ID: 1559693

Journal Information:: Applied Mathematical Modelling, Journal Name: Applied Mathematical Modelling Vol. 75 Journal Issue: C; ISSN 0307-904X

Publisher:: ElsevierCopyright Statement

Country of Publication:: United Kingdom

Language:: English

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Cited by: 31 works

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