45.2 MB (45.0 MB compressed)
4869 x 3245 pixels
41.1 x 27.4 cm ⏐ 16.2 x 10.8 in (300dpi)
SHEILA TERRY / SCIENCE PHOTO LIBRARY SHEILA TERRY / SCIENCE PHOTO LIBRARY
Coloured light interference patterns on a plastic ruler & shallow dish (manufactured by an injection moulding process), used to illustrate the principal of photo-elasticity as applied to stress distribution in objects under complex systems of loading. The object is photographed using cross polarised white light; the pattern of colours provides an isochromatic contour map of stress conditions throughout the object (isochromatic areas have the same colour & indicate similar conditions of stress). Transparent plastic models with stress loads proportional to real objects are made to determine stress distributions.
Model release not required. Property release not required.