Photoelasticity Laboratory

Head of the Laboratory: Dr. Kh. Naderan Tahan

Ext. No: 5667

Photoelastic stress analysis is an experimental method for determination of stress distribution especially when it is hard to obtain an accurate solution from mathematical methods. Photoelasticity experiment is widely used for evaluating stress concentration in irregular geometries. The physical theory behind the photoelasticity includes the double refraction of polarized light passing through translucent material under stress. In the following photos, the polariscope device, an instrument for studying the interactions of polarized light with translucent specimens, and stress distribution in some specimens under loading are shown.  

Translucent Specimens

Polariscope

U-shaped Specimen Under loading in front of Yellow Light

Crane Hook Specimen Under Stress in front of Yellow light

U-shaped Specimen Under loading  in front of Yellow Light

Crane Hook Specimen Under Stress in front of White light

Stress Distribution in wrench specimen under loading