SCATTERED-LIGHT OPTICAL ISODYNES - BASIS FOR 3-DIMENSIONAL ISODYNE STRESS-ANALYSIS

The paper presents the principles, theory, basic techniques, reliabili ty and efficacy of the three-dimensional, non-destructive isodyne stre ss analysis. Analytical isodynes constitute the analytical component o f the theoretical basis of two-dimensional and three-dimensional isody ne analysis of stresses in plates and some bulky bodies. The analytica l isodynes can be obtained experimentally by means of optical isodynes which can be produced by scattered radiation under specified conditio ns. Theoretical bases of optical isodynes are discussed with regard to their theoretical admissibility, technical feasibility, and compatibi lity with the present state of knowledge. Included is discussion of th e accepted mathematical models of the major physical phenomena, and di scussion of the related reliability and efficacy of the isodynes. With in such a framework, isodyne stress analysis is compared with some rel ated, typical procedures of stress analysis. Examples characterize the reliability and efficiency of the isodyne stress analysis in determin ation of components of actual three-dimensional stress stares in plate s, local effects including contact problems, fracture mechanics, and c omposite structures. Conclusions are based on the recognition that det ermination of the actual three-dimensional stresses in structures is o f importance to the progress in modern design procedures, and is intel lectually challenging.