Constitutive models for cohesive particulate materials

A New Constitutive Model for Alumina Powder Compaction

“…A second order polynomial matches well the data for alumina. Thus : (15) where ah = 5.833 X 10- 6 and bh = 1 X 10-…”

“…However, the experimental evidence suggests that for powders a clear distinction exists between the stress conditions at which the irreversible behavior initiates and those corresponding to failure. Recently, criticalstate models have been applied to describe the yielding of dry cohesive powders (see Tripodi et al [15], Puri et al [11]). These models developed by the Cambridge group (see Roscoe et al [12], Burland and Roscoe [1], Schofield and Wroth [13]) have been originally tailored to describe the behavior of clays and sands in triaxial compression and extension.…”

Constitutive Model for Dry Cohesive Powders with Application to Powder Compaction

“…These attributes were first used as criteria for selecting models for preliminary review. Once a preliminary screening was done, the attributes mentioned were again used to rank the reviewed models in terms of their appropriateness for further testing of dry cohesive powders [20].…”

Sigmoid-based hysteresis modeling and high-speed tracking control of SMA-artificial muscle

“…Existen modelos micro y macroscópicos, donde un modelo microscópico considera cada partícula como una entidad diferente y predicen su respuesta esfuerzo-deformación basándose en la distribución de sus fuerzas interpartículas. A nivel macroscópico tratan la masa como un medio continuo y describen características de esfuerzo-deformación como una sola unidad (Tripodi et al, 1992).…”