Measurement of Principal Residual Stresses in Orthotropic Plate When Their Directions are Unk

The authors proposed in this paper the methods for measurement of two principal residual stresses in an orthotropic plate when their directions are unknown. The experimental technique is as follows : A pair of test pieces intersecting at right angles with each other are cut out from a plate in an arbitrary direction, then unknown directions and values of the principal residual stresses are ..