FIELD: measurement technology.
SUBSTANCE: invention relates to methods of evaluating stress-strain state (SSS) and can be used to determine mechanical stresses and deformations of elements of complex structures with the help of a calculation-experimental method. Perform direct measurements of stresses in control points, determine SSS on the basis of finite element calculation results using direct measurement results to correct the design circuit. Perform direct measurements using the acoustoelasticity method which allows to determine not the surface, but averaged in thickness stress walls, and the procedure of determining power boundary conditions acting on every element of a complex structure directly by the results of direct measurement of stresses with further execution of a precision calculation.
EFFECT: improvement of reliability of design evaluation of stress-strain state of elements of complex structures when performing a calculation by finite elements method at the expense of determination of power boundary conditions of an analytical model based on results of instrumental measurements of stresses.
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