shrinkage

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shrinkage

Commerce the loss of merchandise in a retail store through theft or damage

Shrinkage

A decrease in dimensions occurring when a material experiences temperature changes.

Shrinkage

 

reduction in the linear dimensions and volume of materials caused by loss of moisture, contraction, hardening, and other processes. The shrinkage of ceramics and concrete is of considerable importance. Molded clay products are subject to shrinkage during drying and firing. The shrinkage of concrete occurs during air hardening and is due to the evaporation of water from the capillaries in cement rock. The shrinkage of metals and metal alloys during crystallization is due to the reduction in volume on transition from the liquid state to the solid, the additional reduction in volume on cooling from the solidification point to room temperature, and the penetration of molten metal into the inner part of the congealing mass and all the cavities and cracks formed during molding of the ingot or shaped casting.

Reduction over time in the vertical dimensions of structural components, such as stone and wood walls and heat-insulating fill, is often called settling.

shrinkage

[′shriŋ·kij]
(engineering)
Contraction of a molded material, such as metal or resin, upon cooling.
Contraction of a plastics casting upon polymerizing.
(geology)
The decrease in volume of soil, sediment, fill, or excavated earth due to the reduction of voids by mechanical compaction, superimposed loads, natural consolidation, or drying.

shrinkage

1. The reduction in dimensions of a piece of wood during drying; reduction is very slight along the grain, but a reduction of 5 to 6% in width is common for dry flat-sawn boards.
2. The volume decrease of concrete caused by drying and chemical changes.
3. The proportionate decrease in dimensions or volume of a material, usually as a result of a change in temperature.
References in periodicals archive ?
The device was successfully used to measure wood shrinkage stresses along the radial direction under high-temperature drying (Cheng et al.
From the measured dimensions of the specimens and the nominal dimensions of the cavity--measured at room temperature--the linear shrinkages were determined according to (1):
A comprehensive investigation into accuracy of shrinkage and creep prediction models was performed by Meyerson et al.
Flow shrinkage was compared with transverse-to-flow shrinkage, and, similarly, near-gate shrinkage was compared with away-from-gate shrinkage, using the plaque mold.
Both companies estimated shrinkage using similar methodologies, generally multiplying a shrinkage rate based on experience by the amount of sales for the period between the physical inventory and year-end.
Finally, Moldflow's MF/Warp was used to compute the part shrinkage and warpage.
When compared at similar shrinkage, 1X40 DSP fiber has 50% higher LASE than 1W70 but still has lower LASE than dry rayon.
Figure 11 plots the final shrinkages from four lateral motion models together with the experimental data at the reference-processing condition.
As such, lumber sawn from frozen logs has a reduced amount of bound water at the time of sawing and thus will experience less shrinkage to its in-service condition and less warp due to associated differential shrinkage.
Local shrinkage variations introduce a bending moment to the geometry and thus cause warpage -- or, if the part is constrained, introduce residual stresses that can substantially reduce component life, and whose structural effects are very difficult to predict using conventional analytical tools.
Summary Through a minimal amount of experimentation, the major factors causing undesirable volume swell, volume shrinkage and weight change in printing rolls have been determined;
Generally, there are three stages in shrinkage of an injection molded part: in-mold shrinkage (shrinkage during cooling stage), as-mold shrinkage (shrinkage just after mold opening), and postshrinkage (shrinkage caused by physical aging, recrystallization.