Article: Park, JS; Ray, AK; Dawson, PR; Lienert, U; Miller, MP; (2016) “Determination of Residual Stress in a Microtextured Alpha Titanium Component using High-energy Synchrotron X-rays”, Journal of Strain Analysis for Engineering Design, 51 (5): 358-374
Abstract: A shrink-fit sample is manufactured with a Ti-8Al-1Mo-1V alloy to introduce a multiaxial residual stress field in the disk of the sample.
A set of strain and orientation pole figures are measured at various locations across the disk using synchrotron high-energy X-ray diffraction. Two approaches-the traditional sin(2) Psi method and the bi-scale optimization method-are taken to determine the stresses in the disk based on the measured strain and orientation pole figures, to explore the range of solutions that are possible for the stress field within the disk. While the stress components computed using the sin(2) Psi method and the bi-scale optimization method have similar trends, their magnitudes are significantly different. It is suspected that the local texture variation in the material is the cause of this discrepancy.
Funding Acknowledgement: U.S. Air Force Office of Scientific Research Multi-Scale Structural Mechanics Program [FA9550-09-1-0642]
Funding Text: The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This work was supported by the U.S. Air Force Office of Scientific Research Multi-Scale Structural Mechanics Program (contract number FA9550-09-1-0642).