Substructure

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substructure

[¦səb′strək·chər]
(civil engineering)
The part of a structure which is below ground.

Substructure

The foundation and footings as opposed to the superstructure.

Substructure

 

(or subboundary structure), in metals, the internal structure of grains characterized by the type, number, and arrangement of lattice defects.

In undeformed metal, the grains consist of blocks (subgrains) that are misoriented relative to one another by angles of the order of minutes of arc; the blocks are separated by subboundaries. The shape, size, and angular misorientation of the subgrains, as well as the length of the subboundaries, are important characteristics of metal substructure. The subgrains contain dislocations, which form arrays or are in a disordered arrangement. The arrangement of dislocations depends on the nature of the material and the “history” of the sample; for example, for small degrees of deformation, dislocations are concentrated in slip planes.

With increasing deformation in such metals as aluminum or iron, the dislocations form complex spatial networks. The type, structure, and arrangement of the dislocation arrays and the density of dislocations are also characteristic of metal substructure.

V. IU. NOVIKOV

substructure

The foundation or understructure of a building; supports the superstructure.
References in periodicals archive ?
and explaining the substructural, underlying forces that influence and
As with the discussion for eye irritation (above), the DSS is mainly a rule-based approach, the rules being developed based not only on substructural molecular features but also on physicochemical properties such as molecular weight, aqueous solubility, and log [K.sub.ow].
The assessment will be conducted in three stages from piling works through substructural works to superstructural works.
foreign based" dimension is central to the analysis of substructural autonomy, and that the degree and pattern of centralisation in multi-national firms is likely to differ from that in multi-plant organisations which only operate within national boundaries.
The observed failure mode transition may likely be related to several factors such as stress-dependent creep deformation mechanism transition, different propensity of individual weld regions for creep deformation localization, and strain-enhanced substructural coarsening and alloying elements redistribution between BM and WM indicated by performed microstructural and fracture path observations.
Li, "Application of improved hybrid interface substructural component modal synthesis method in vibration characteristics of mistuned blisk," Chinese Journal of Mechanical Engineering, vol.
Dynamic modeling methods that are able to take into account the housing compliance include finite element method (FEM) [6-8], static substructure synthesis method (often referred to as simply substructure synthesis method) [9,10], multibody dynamic modeling method [11], substructural modal synthesis method (often referred to as dynamic substructural synthesis method) [12], and substructural mobility synthesis method [13,14].
AIM Aerospace is an independent supplier of composite ducting, substructural and interiors parts for the commercial aerospace industry, focused on the highest value Boeing platforms, including the 737, 777 and 787.
Laser tooth preparation must be carried out bearing in mind the possible effects of a series of variables: fluence, power density, pulse length, laser beam angle, focused mode, and air-water jet intensity are all factors that can cause substructural damage to the dentine.
* Exactly two distinctive prototypical substructural types in a hybrid structure identifiable as either (a) hierarchy or (b) cycle.
101 500 m2, 3 new substructural constructions, noise barrier wall approx.
Li and Law [20] presented a substructural damage identification approach under moving vehicular loads based on a dynamic response reconstruction technique.