The influence of defects on the elastic response of lattice structures resulting from additive manufacturing

Stiffness prediction for additively manufactured (AM) lattices is necessary for lightweight components design. For a given lattice structure, the Gibson and Ashby (GA) model can predict relative stiffness as a function of its relative density. However, volumetric porosity and surface roughness defects that are commonplace in AM lattices depreciate the quality of prediction made by the GA model. This is because such defects complicate the elastic behavior of lattice structures. In this work, a modified GA model is proposed that accounts for these defects. A Bayesian inferencing framework is constructed to delineate the influence of spatial distributions of these defects on resulting mechanical response. Principal component analysis (PCA) is used to identify differences between elastic strain fields (∊11, ∊22, and ∊12) resulting from perfect and defective lattices. The insights obtained can provide a viable approach to predict the mechanical response of as-received AM lattices that are often defective, and thereby enable systematic approaches for their design.

© This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/

Files

Metadata

Work Title The influence of defects on the elastic response of lattice structures resulting from additive manufacturing
Access
Open Access
Creators
  1. Panwei Jiang
  2. Edward C. DeMeter
  3. Saurabh Basu
License CC BY-NC-ND 4.0 (Attribution-NonCommercial-NoDerivatives)
Work Type Article
Publisher
  1. Elsevier BV
Publication Date November 2021
Publisher Identifier (DOI)
  1. 10.1016/j.commatsci.2021.110716
Source
  1. Computational Materials Science
Deposited July 01, 2022

Versions

Analytics

Collections

This resource is currently not in any collection.

Work History

Version 1
published

  • Created
  • Added manuscript_revised-1.pdf
  • Added Creator Panwei Jiang
  • Added Creator Edward C. De Meter
  • Added Creator Saurabh Basu
  • Published
  • Updated Work Title Show Changes
    Work Title
    • The influence of defects on the elastic response of lattice structures resulting from additive manufacturing
    • ! The influence of defects on the elastic response of lattice structures resulting from additive manufacturing
  • Renamed Creator Edward C. DeMeter Show Changes
    • Edward C. De Meter
    • Edward C. DeMeter
  • Updated Work Title Show Changes
    Work Title
    • ! The influence of defects on the elastic response of lattice structures resulting from additive manufacturing
    • The influence of defects on the elastic response of lattice structures resulting from additive manufacturing
  • Updated