Stress-strain state of rod with heterogeneous structure (Novosibirsk)

Abstract

Heterogeneous structures have a number of significant advantages over classical homogeneous. Their stress-strain state control allows to more effectively adapt the system to given thermal conditions and, as a result, additionally save weight and cost of the structure. The practical use of elements with heterogeneous structure, requires the creation of engineering calculation approaches with acceptable labor intensity, accuracy and versatility.Purpose: The improvement of design methods implying physical relations in problems of thermal power deformation of rods with heterogeneous structure.Design/methodology: The Timoshenko rod model design involves the approximation of transverse shear functions and membrane analogy of shear deformation in torsion. A threedimensional prismatic rod having a rectangular cross-section, is obtained from quasi-homogeneous parts (phases) made of various structural materials.Research findings: Theoretical calculations are obtained for thermal power spatial bending with tension, transverse shear and torsion. These equations contain stiffness characteristics of zero, first- and second-order tensile bending, shear and torsional stiffnesses of the section.Practical implication: These equations can be used to compactly formulate physical relations and the boundary value problem of spatial deformation of rods with heterogeneous structure.