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

Susheel Dharmadhikari; Eric Keller; Asok Ray; Amrita Basak

doi:10.1016/j.ijfatigue.2020.105922

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

Susheel Dharmadhikari, Eric Keller, Asok Ray, Amrita Basak

Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

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 language	English (US)
Article number	105922
Journal	International Journal of Fatigue
Volume	142
DOIs	https://doi.org/10.1016/j.ijfatigue.2020.105922
State	Published - Jan 2021

All Science Journal Classification (ASJC) codes

Modeling and Simulation
General Materials Science
Mechanics of Materials
Mechanical Engineering
Industrial and Manufacturing Engineering

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10.1016/j.ijfatigue.2020.105922

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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.",

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AB - 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.

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

Abstract

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