Photoelastic stress analysis. A perforated plastic sheet undergoing stress analysis by photopolari- metry. The plastic sheet is stretched under weight
Photoelastic stress analysis. A perforated plastic sheet undergoing stress analysis by photopolari- metry. The plastic sheet is stretched under weight, and the stress effects are detected as birefringence patterns in the plastic (seen as colours). A round filter (blue) polarises the light in order to visualise these stress patterns. The instrument used is a polarimeter. This phenomenon, called photoelasticity, is used in stress calculations in engineering design by building plastic scale models of a subject (a bridge, for example) and examining the stress pattern produced through polarised light.
Size: 4877px × 3278px
Photo credit: © ALEX BARTEL/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: -destructive, analysis, birefringence, effect, film, pattern, photoelastic, photoelasticity, photopolarimetry, plastic, polarimetry, polymer, stress, technology, test, testing
