Improved understanding of damage precursors through local mechanical characterization

Daniel P. Cole*, Ed M. Habtour

*Corresponding author for this work

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

2 Citations (Scopus)

Abstract

We report on the use of local mechanical characterization techniques for the understanding of structural damage precursors in various material systems. Instrumented indentation and atomic force microscopy (AFM) were used to characterize local damage in: (1) fatigued metallic beams subject to non-linear vibration, (2) individual polymer and glass microfibers, and (3) additive manufactured thermoplastics. Indentation studies of the fatigued metallic beams showed a compliance effect of up to 40% in relatively highly stressed regions. An approved fiber mounting technique allowed for indentation of unmodified surfaces of single microfibers, while AFM modulus maps of the fibers reveal local regions of relative compliance. Local mechanical tests of 3-D printed acrylonitrile butadiene styrene specimens revealed a variation in properties between printed beads and bead-bead interfaces. The nano-/micro-scale techniques developed in the present study provide a framework for understanding how damage precursors may affect processing-structure-property relationships in present and future 1structural aerospace materials.

Original languageEnglish
Title of host publicationIntegrated System Design and Implementation; Structural Health Monitoring
PublisherAmerican Society of Mechanical Engineers
Number of pages9
Volume2
ISBN (Electronic)9780791857304
DOIs
Publication statusPublished - 2015
Externally publishedYes
EventASME 2015 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, SMASIS 2015 - Colorado Springs, United States
Duration: 21 Sept 201523 Sept 2015

Conference

ConferenceASME 2015 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, SMASIS 2015
Abbreviated titleSMASIS 2015
Country/TerritoryUnited States
CityColorado Springs
Period21/09/1523/09/15

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