Principal Residual Stress Measurement Method in Orthotropic Plate when Principal Axes of Elasticity and Residual Stress do not Coincide

Residual Stress Characterization in Orthotropic Plate by Combining Hole-drilling Method and Speckle Interferometry

Novel method for a determination of residual stresses in orthotropic composite plates based on local displacement measurements by electronic speckle-pattern interferometry is developed and verified. The values of hole diameter increments in principal residual stress directions serves as initial experimental deformation. The technique is based on analytical solution of S.G. Lekhnitsky, which des...

Residual Stress, Stress Relief, and Inhomogeneity in Aluminum Plate

Through-thickness residual-stress profiles in rolled 7050-T74 aluminum plate were measured before and after stress relief by stretching (-Tx51). Measurement required adapting the crack compliance method to measure both inplane stress components. Unexpected features in the profiles could be explained by through-thickness yield strength variations caused by crystallographic texture.

Overview Residual stress Part 1 – Measurement techniques

Residual stress is that which remains in a body that is stationary and at equilibrium with its surroundings. It can be very detrimental to the performance of a material or the life of a component. Alternatively, beneficial residual stresses can be introduced deliberately. Residual stresses are more difficult to predict than the in-service stresses on which they superimpose. For this reason, it ...

Measuring of Residual Stress in TIG Welding of the 304 Stainless Steel by Ultrasonic Method

In this research, the effect of different welding parameters on residual stress and microstructure of the weld region, as well as the comparison of two methods of measuring residual stress using critical fracture longitudinal wave method and preformation method have been investigated. For this purpose, the taguchi DOE methodology is used as a statistical method to optimize four parameters of pu...

The Principal Axes Method for Constructive Induction