Abstract: The purpose of this project was to evaluate mechanical properties of St. Peter sandstone by in situ testing, and to compare the field data with laboratory results. Direct shear tests were conducted to evaluate the ...

Abstract: Application of stress or changes in environmental conditions can cause a material such as concrete or rock to become damaged, thereby affecting the performance of the structure. Because damage processes produce microseismic ...

Abstract: Field observations indicate that failure in soft rock is often associated with a slip surface or shear band, where deformation is concentrated in a narrow zone; displacements occur with decreasing stress within the shear ...

Abstract: The stress field in a pile-supported 3.9-m-high embankment was interpreted through three-dimensional finite-element modeling, and evaluated by field measurements involving strain gauges on the piles and earth pressure cells ...

Abstract: The development of a localized damage zone or shear band in rock was studied through numerical and physical experiments. A laboratory biaxial (plane strain) compression test was conducted on a prismatic specimen of Berea ...

Abstract: A study of the process zone in Charcoal and Rockville granites, average grain sizes of 1 and 10 mm, is conducted using the double‐cantilever‐beam and double‐edge‐notched geometries. The fracture process for mode I (tensile) ...

Abstract: The problem of interaction among cracks, including the effects of process zones, is studied. The Dugdale‐type cohesive‐zone model is extended to mixed‐modes of loading and is then used to evaluate the size of process zones. ...