Instrumentation, Techniques, and Measurement

Residual stress measurement via digital image correlation and sharp indentation testing

[+] Author Affiliations
Jinlong Chen, Jihua Liu, Cuiru Sun

Tianjin University, School of Mechanical Engineering, Department of Mechanics, Yaguan Road 135, Jinnan District, Tianjin 300354, China

Tianjin University, Tianjin Key Laboratory of Modern Engineering Mechanics, Yaguan Road 135, Jinnan District, Tianjin 300354, China

Opt. Eng. 55(12), 124102 (Dec 15, 2016). doi:10.1117/1.OE.55.12.124102
History: Received September 24, 2016; Accepted November 21, 2016
Text Size: A A A

Abstract.  An optical and semidestructive method to determine surface residual stress, which combines digital image correlation (DIC) with sharp indentation testing, is proposed. Based on the expanding cavity model, when a semi-infinite body is subjected to uniform equi-biaxial residual or applied stresses, the surface displacement around the indentation satisfies radial profiles. Therefore, the relation between the radial displacement and the residual or applied stresses on the surface of a semi-infinite body can be determined. The described relation was tested using indentation experiments for different applied stress states in aluminum. These states were generated using a stress-generating setup with two independent orthogonal loading axes. DIC was used to measure the displacement. The magnitude of the residual stress was obtained using nonlinear curve fitting based on theoretical analysis, as well as linear curve fitting since the experimental data almost had a linear relationship. The calculations are in good agreement with the values of applied stresses.

Figures in this Article
© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Jinlong Chen ; Jihua Liu and Cuiru Sun
"Residual stress measurement via digital image correlation and sharp indentation testing", Opt. Eng. 55(12), 124102 (Dec 15, 2016). ; http://dx.doi.org/10.1117/1.OE.55.12.124102


Access This Article
Sign in or Create a personal account to Buy this article ($20 for members, $25 for non-members).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging & repositioning the boxes below.

Related Book Chapters

Topic Collections

PubMed Articles
Advertisement
  • Don't have an account?
  • Subscribe to the SPIE Digital Library
  • Create a FREE account to sign up for Digital Library content alerts and gain access to institutional subscriptions remotely.
Access This Article
Sign in or Create a personal account to Buy this article ($20 for members, $25 for non-members).
Access This Proceeding
Sign in or Create a personal account to Buy this article ($15 for members, $18 for non-members).
Access This Chapter

Access to SPIE eBooks is limited to subscribing institutions and is not available as part of a personal subscription. Print or electronic versions of individual SPIE books may be purchased via SPIE.org.