An overhanging beam method for measuring internal stress in coatings

  1. (PDF, 905 KB)
  2. Get@NRC: An overhanging beam method for measuring internal stress in coatings (Opens in a new window)
AuthorSearch for:
Journal titleJournal of the Oil & Colour Chemists' Association
Pages271275; # of pages: 5
Subjectinternal stress distribution; paints; metallic coatings; residual stresses; overhanging beam balance; stress; shrinkage; clear coating; lacquer; methacrylate resin; polystyrene resin; toluene; Buildings; etat mecanique interne; peinture; revetement metallise; contrainte residuelle
AbstractThe internal stress in polystyrene and polyisobutyl methacrylate lacquers was measured by coating a thin steel substrate on one side and measuring its bending as the coating dried. The substrate was supported simply at two points, so calculated that the deflection at the centre of its span was independant of weight changes in the coating, where the bending displacement was due only to stress in the coating. Internal stress proved to be large and independent of dried coating thickness and initial solution concentration and the results obtained agreed well with internal strain data obtained previously. The simply supported overhanging bean configuration used here seems to be more accurate than a cantilever arrangement, where the constraints imposed by the end clamp result in values for internal stress that are too low.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number18634
NPARC number20374820
Export citationExport as RIS
Report a correctionReport a correction
Record identifier6b5d51c9-895a-4629-aea0-ea069ee3ae20
Record created2012-07-23
Record modified2016-05-09
Bookmark and share
  • Share this page with Facebook (Opens in a new window)
  • Share this page with Twitter (Opens in a new window)
  • Share this page with Google+ (Opens in a new window)
  • Share this page with Delicious (Opens in a new window)
Date modified: