Measurement of localized deformation of shape memory alloy under fast tensile loading

Ping Feng; Qing-Ping Sun; Tong-Xi Yu

doi:10.1117/12.839389

25 August 2009 Measurement of localized deformation of shape memory alloy under fast tensile loading

Ping Feng, Qing-Ping Sun, Tong-Xi Yu

Proceedings Volume 7375, ICEM 2008: International Conference on Experimental Mechanics 2008; 73756Q (2009) https://doi.org/10.1117/12.839389
Event: International Conference on Experimental Mechanics 2008 and Seventh Asian Conference on Experimental Mechanics, 2008, Nanjing, China

Abstract

The deformation of NiTi shape memory alloy strips and microtubes subjected to uniaxial tensile loading involves formation and growth of high-strain martensite domain(s) of various shapes due to autocatalytic stress-induced phase transformation. Under fast tensile loading with strain rates of 10^-3~10⁰/s, the number of the domains will increase with the strain rate and the domain morphology becomes very complicated. Measurement of this kind of highly inhomogeneous and localized deformation is a challenging problem. This paper reports the results of our recent experimental advances in solving such problem. It includes: (1) the determination of domain front by direct characterization method, block tracking method, and speckle tracking method; (2) non-contact measurement of global and local strains by flexible video extensometer method. The above methods used in the measurements have been proved to be reliable and suitable for the localized deformation under fast tensile loading conditions.

Citation Download Citation

Ping Feng, Qing-Ping Sun, and Tong-Xi Yu "Measurement of localized deformation of shape memory alloy under fast tensile loading", Proc. SPIE 7375, ICEM 2008: International Conference on Experimental Mechanics 2008, 73756Q (25 August 2009); https://doi.org/10.1117/12.839389

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available