A dual-imaging framework for multi-scale measurements of fatigue crack evolution in metallic materials

Susheel Dharmadhikari, Eric Keller, Asok Ray, Amrita Basak

Research output: Contribution to journalArticle

Abstract

This paper presents a dual-imaging methodology to investigate fatigue crack initiation & propagation along the lateral and transverse directions in Al7075 flat specimens having a one-sided V-notch. The framework consists of a confocal and a digital microscope. The confocal microscope can detect the short crack initiation at a length-scale of 3 µm while the digital microscope has the capability of reliably measuring cracks at a scale of 0.5 mm. The apparatus provides a unique advantage of characterizing the multi-scale fatigue crack evolution without any significant restrictions on maximum specimen size and maximum loading or frequency.

Original languageEnglish (US)
Article number105922
JournalInternational Journal of Fatigue
Volume142
DOIs
StatePublished - Jan 2021

All Science Journal Classification (ASJC) codes

  • Modeling and Simulation
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

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