Mechanical characterization and brittle failure of the stony meteorite, aba panu (L3), using digital image correlation

Md Fazle Rabbi, Siddhant Datta, Aditi Chattopadhyay, Laurence A.J. Garvie, rik Asphaug, Desiree Cotto-Figueroa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Because meteorites can provide valuable insight into the mechanical properties of asteroids, it is important to characterize meteorites and understand and model their mechanical response and failure behavior. In this study, the Aba Panu (L3) meteorite was investigated using uniaxial compression tests along with an in-situ full-field 3D digital image correlation (DIC) system. The DIC system enabled the capture of strain evolution during mechanical testing to determine elastic modulus and to examine crack initiation sites and failure modes. Samples were cut from an Aba Panu stone to characterize the microstructural and mechanical properties. Density and porosity were measured before the quasi-static compression testing. Phase size and distribution for different chondrules and minerals were calculated from the electron probe microanalyzer (EPMA) data. Under a compressive state of stress, Aba Panu meteorite samples failed at an average compressive strength of 438.4 MPa with a standard deviation of 77.5 MPa. DIC analysis of displacement and strain fields located the region of maximum deformation and identified crack initiation sites and axial splitting as a key brittle failure mode. Microstructural characterization results were used to construct a simple microstructure-based representative volume element (RVE) to model the mechanical response using Dream 3D software. The results of the finite element (FE) analysis were confirmed using DIC measurements.

Original languageEnglish (US)
Title of host publicationAIAA Scitech 2021 Forum
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
Pages1-10
Number of pages10
ISBN (Print)9781624106095
StatePublished - 2021
EventAIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2021 - Virtual, Online
Duration: Jan 11 2021Jan 15 2021

Publication series

NameAIAA Scitech 2021 Forum

Conference

ConferenceAIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2021
CityVirtual, Online
Period1/11/211/15/21

ASJC Scopus subject areas

  • Aerospace Engineering

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