A NOVEL TRANSITION REGION REPRESENTATION FOR ADDITIVE MANUFACTURING FOR GRADED MATERIALS, STRUCTURES AND TOLERANCES

Published

August 7, 2017

Author(s)

Gaurav Ameta, Paul W. Witherell

Abstract

Additive manufacturing (AM) has enabled fine grain con-trol over heterogeneous materials in ways that were not previously possible. This paper presents a novel method for representing and communicating heterogeneous ma-terials based structures that include tolerancing of geom- etry and material together. AM has expanded design possibilities to include specified material heterogeneities, including functionally graded materials. The aim of the paper is to propose a means to specify nominal materi-als and allowable material variations in parts, including (a) explicit material transitions (b) functional transitions to support single and multiple material behaviors. The transi-tion region combines bounded regions (volumes and sur-faces) and material distribution equations. Tolerancing is defined at two levels, that of the geometry including bounded regions and that of the materials. Material toler-ances are defined as allowable material variations from nominal material fractions within a unit volume at a given location computed using material distribution equations. The method is described thorough several case studies of abrupt transitions, lattice based transitions, two and three material transitions.

Proceedings Title

Proceedings of the 2017 International Design Engineering Technical Conferences

Conference Dates

August 6-10, 2017

Conference Location

Cleveland, OH

Conference Title

37th Computers and Information in Engineering Conference

Pub Type

Conferences

Keywords

Additive Manufacturing, graded materials, transition regions

Citation

Ameta, G. and Witherell, P. (2017), A NOVEL TRANSITION REGION REPRESENTATION FOR ADDITIVE MANUFACTURING FOR GRADED MATERIALS, STRUCTURES AND TOLERANCES, Proceedings of the 2017 International Design Engineering Technical Conferences, Cleveland, OH (Accessed April 30, 2024)