A separate-bottom Couette cell is used to carry out ring-shear tests on sand and hydrate, the evolution of shear bands recognized using tracer method. Based experimental verification, a numerical simulation method applied study band variation law with height strength sample. Analyzing distribution stress strain gives dimensionless number (c+ρgH·tgφ)H/αGL that affects characteristics band, which...

Abstract Strain localization during plastic deformation drastically reduces the shear band stability in metallic glasses, ultimately leading to catastrophic failure. Therefore, improving plasticity of glasses has been a long-standing goal for several decades. In this regard, nanoglass, novel type glass, proposed exhibit differences short and medium range order at interfacial regions, which coul...

Boron carbide is super-strong and has many important engineering applications such as body armor cutting tools. However, the extended of boron have been limited by its low fracture toughness arising from anomalous brittle failure when subjected to hypervelocity impact or under high pressure. This abnormal directly related formation a tiny amorphous shear band 2–3 nm in width several hundred len...