Geogrids provide reinforcement for aggregate materials through interlocking between granular particles and geogrid apertures. The reinforcement or stabilization effect of a geogrid can be quite different when used with similar aggregate types but having different particle size distributions. This paper describes recent research efforts at the University of Illinois focused on triaxial compressi...

The difference of sample preparation methods will directly lead to the structure sample, and mechanical response characteristics under external load be different. Based on conventional tests such as particle analysis, specific gravity, critical moisture content, consolidation test undisturbed loess from Xi’an, this paper focuses static triaxial consolidated drained shear undrained remolded loes...

Despite its widespread use as graft material in orthopaedic surgical procedures, morselized cancellous bone has not yet been well characterized from the standpoint of its mechanical properties. To accommodate the noncohesive nature of this loose particulate form of bone, a triaxial compression test apparatus commonly used in engineering soil mechanics was adapted for the testing of fresh-frozen...

The consequences of nuclear black holes for the structure and dynamics of stellar spheroids are reviewed. Slow growth of a black hole in a pre-existing core produces a power-law cusp, ρ ∼ r −γ , with γ ≈ 2, similar to the steep cusps seen in faint elliptical galaxies. The weaker cusps in bright ellipticals, γ ∼ < 1, may result from ejection of stars by a coalescing black-hole binary; there is m...