C2016-08 – Pressurized Fluid-Submerged, Internal, Close-Range Photogrammetry System For Laboratory Testing

Technology # 16-08 A Technology for 3-D Measurements of Triaxial Soil Samples The triaxial test, a standard test for measuring soil shear strength, is critical to the design of foundations for all structures founded on soil, such as bridges or buildings. Currently, the cross-sectional area of a triaxial soil sample is assumed during testing, which may lead to strength measurement errors of up to 30%. The device overcomes this error by accurately determining the failure plane of the sample. Furthermore, the internal camera system allows for three-dimensional tracking of hundreds of individual targets on the surface of a sample. Targets are located to within 0.01-mm of their actual location in x-y-z coordinates, allowing for accurate characterization of local deformations on the sample surface. Targets are used to reconstruct three-dimensional models of samples, thereby allowing for measurement of total volumetric changes to within +-0.3% of the actual volume of a sample. The invention is available for licensing. For interested parties seeking further information, feel free to contact: Mark Allen Lanoue Technology Manager / Tech Ventures University of Arkansas (479) 575-7243 malanoue@uark.edu Technology Ventures ventures@uark.edu 479-575-7243

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