APPLICATION OF MOIRE INTERFEROMETRY TO TECHNOLOGICAL STRESS DISTRIBUTION MEASUREMENT

An experimental study was conducted to measure residual stress distribution around cold-expanded fastener holes and interference stress distribution near interference fit fastener holes. Investigated stresses were relieved by cutting specimens along a radial direction, and additional strain fields created by relieving the stresses were measured using moire interferometry. Relaxation of the residual stress caused by circular loading was investigated experimentally. The results of typical test are presented a...