Definitions for "Internal stress"
Any stress in a member.
Mechanical stress caused by contraction of the cured coating film, due to evaporation of solvents, curing, difference in temperature or aging. This mechanical stress can induce coating defects such as delamination, cracking... . Internal stress can be reduced using plasticizers, optimizing film curing, or lowering film thickness.
Stress in a diamond or gemstone resulting from inclusions or other structural irregularities, visible through the polariscope.