Author(s): Larry J. Weber; Wilfrid A. Nixon
Linked Author(s): Larry J. Weber
Keywords: No Keywords
Abstract: To aid in the analysis of the controlling failure processes around a crack tip in ice, replicas of fracture surfaces were viewed in a scanning electron microscope. Fracture surfaces were obtained by loading beam specimens of granular polycrystalline and S2 columnar ice in four-point-bending. The loading was monotonically increased until failure for specimens with either no previous loading or for specimens subjected to a cyclic (fatigue) loading history. The scanning electron micrographs exhibit signs of elastic and plastic behavior. Evidence of slip, cross-slip, and fatigue crack striations near the crack tip will be presented and discussed.
Year: 1992