Null strain analysis of submerged aneurysm analogues using a novel 3D stereomicroscopy device. Issue 8 (10th June 2020)

• Record Type: Journal Article
• Authors: Lane, Brooks A.; Lessner, Susan M.; Vyavahare, Narendra R.; Sutton, Michael A.; Eberth, John F.
• Is Part Of: Computer methods in biomechanics and biomedical engineering. Volume 23:Issue 8(2020)
• Page Start: 332
• Page End: 344
• Publication Date: 2020-06-10
• Subjects: Stereo DIC -- aortic aneurysm -- cerebral aneurysms; Biomechanics -- Data processing -- Periodicals; Biomedical engineering -- Periodicals; Biomechanics -- Periodicals; Biomedical Engineering -- methods -- Periodicals; Computing Methodologies -- Periodicals; 612.7
• DOI: 10.1080/10255842.2020.1724974
• Languages: English
• ISSNs: 1025-5842

Abstract

Abstract: To measure the inhomogeneous 3D-strain fields present during inflation-extension testing of physiologically submerged micro-aneurysms, a Stereo Digital Image Correlation (StereoDIC) microscopy system is developed that revolves 15 ° stereo-angle cameras around a centrally-mounted target. Calibration is performed using submerged dot patterns and system accuracy verified using strain and deformation analyses for rigid body motions of speckle-patterned, micro-aneurysmal surrogates. In terms of the Green-Lagrange strain tensor and the 3D displacement fields, the results are stable even after 120 minutes, with maxima in both strain bias and strain standard deviation less than 2E-03 for all components, and micron-level displacement standard deviation.