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- Title
Characterisation of Indentation-Induced Pattern Using Full-Field Strain Measurement.
- Authors
Kuo, J.-C.; Tung, S.-H.; Shih, M.-H.; Lu, Y.-Y.
- Abstract
In this study, digital image correlation (DIC)-based strain analysis software was successfully developed. Its strain resolution lies in the order of 2.3 × 10−4–3.1 × 10−4. Full-strain field measurement was used to study indentation-induced plastic patterns around the spherical indenter for a polycrystal and a single crystal of pure aluminium. During indentation, the pure aluminium specimen of the single crystal revealed a symmetric indentation pattern of von Mises strain. The piling-up around the residual impression was successfully and directly characterised by examining the sign of strain ℇ X and ℇ Y in the X and Y directions. However, the inward, out-of-plane movement results in an error in calculating in-plane strain referred to as a ‘distortion strain’ using two-dimensional DIC.
- Subjects
ANISOTROPY; INDENTATION (Materials science); ALUMINUM silicates; INTERFEROMETRY; PHOTOELASTICITY; DIGITAL image processing
- Publication
Strain, 2010, Vol 46, Issue 3, p277
- ISSN
0039-2103
- Publication type
Article
- DOI
10.1111/j.1475-1305.2008.00576.x