METHOD DETERMINING RESIDUAL STRESSES Russian patent published in 1998 - IPC

FIELD: measurement technology. SUBSTANCE: two samples of specified dimensions are cut out of article by two mutually perpendicular directions, flexural and torsional deformations are measured after cutting and after reduction of thickness of samples by removal of stressed layers of material. Obtained data are used to determine residual stresses in material of article. Dimensions of both samples are found before cutting from condition that derivative of flexural deformation and derivative of torsional deformation over thickness of removed layer are equal provided that equality of corresponding normal and tangential stresses is achieved. EFFECT: enhanced precision of measurements. 10 dwg