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.

中文翻译：

---

使用新型 3D 立体显微镜设备对埋入式动脉瘤类似物进行零应变分析

摘要：为了测量生理浸没微动脉瘤的膨胀-延伸测试过程中出现的不均匀 3D 应变场，开发了一种立体数字图像相关 (StereoDIC) 显微镜系统，该系统将 15° 立体角相机围绕中央安装的目标旋转。使用浸没点图案进行校准，并使用散斑图案、微动脉瘤替代物的刚体运动的应变和变形分析来验证系统精度。格林-拉格朗日应变张量和3D位移场方面，120分钟后结果仍然稳定，所有分量的应变偏差和应变标准差最大值均小于2E-03，微米级位移标准差。