Stochastic mechanical modeling of MMOD impact-inspired cylindrical cavities in Duocel foam

Mujan N. Seif, Alexandre Martin, Matthew J. Beck, Jake Puppo, Metodi Zlatinov, Denver Schaffarzick

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Duocel aluminum foam is a critical component of state-of-the-art micrometeoroid and orbital debris shielding. However, its randomly-oriented constituent ligaments create a significant variability in properties at different length scales. Previous efforts have thoroughly characterized the statistical implications of micro-to macro-scale length transitions on the homogenized elastic behavior. In this work, defects are introduced in the form of cylindrical cavities designed to represent the structural effect of an MMOD impact. We utilize KRaSTk to determine the absolute magnitude of changes to the elastic modulus of structures with varying reduced density. We also explore the material’s structural evolution from isotropic to transverse isotropic that is instigated by the inclusion of these cavities, and observe that an increase in cavity volume widens the gap between in-plane and through-the-thickness elastic response. With these results, we are able to draw statistical-based conclusions regarding the effect of MMOD impact-inspired cavities on the mechanical properties of Duocel-motivated structures.

Original languageEnglish
Title of host publicationAIAA AVIATION 2022 Forum
DOIs
StatePublished - 2022
EventAIAA AVIATION 2022 Forum - Chicago, United States
Duration: Jun 27 2022Jul 1 2022

Publication series

NameAIAA AVIATION 2022 Forum

Conference

ConferenceAIAA AVIATION 2022 Forum
Country/TerritoryUnited States
CityChicago
Period6/27/227/1/22

Bibliographical note

Funding Information:
The research presented here was supported by M.N. Seif’s NASA Space Technology Graduate Research Fellowship. We thank the University of Kentucky Center for Computational Sciences and Information Technology Services Research Computing for their support and use of the Lipscomb Compute Cluster and associated research computing resources.

Publisher Copyright:
© 2022, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Nuclear Energy and Engineering
  • Aerospace Engineering

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