Categories

Draft set of categories for materials ontology (3/22/2017)

Portion of Solid Material

  Pure Substance
    element
    compound
  Mixture (decomposed via physical change)
    homogeneous mixture
    heterogeneous mixture

Material property (BFO quality)

    compare with QUDT quantity kind 
    color 
    hardness
    ultimate tensile strength (qudt:quantityKind qudt-quantity:Stress)
    dynamic viscosity (qudt:quantityKind qudt-quantity:DynamicViscosity)
    glass-transition temperature

Composition (what and how much)

    mass fraction of an alloy (BFO quality)
    volume fraction of carbon fibers for a composite (BFO quality)
    repeating unit for a polymer chain (composition and structure)

Form

    plate
    sheet 
    forged alloy
    laminated composite
    woven composite

Structure

    alloy grain size (BFO quality)
    linear, branched, cross-linked, and networked polymer chain
    grain orientation

State

    stress state:  uni-axial, bi-axial, multi-axial, complex
    damage state:  crack, corrosion, burn
    thermal state

Environment

    chemical 
    mechanical load 
    thermal load
    radiation

Scale

    micro
    meso
    macro