Designing and Calculation of Extruded Sections of an Inhomogeneous Composition

Abstract

Extruded sections with various versions of reinforcing elements are considered. In particular, a T‑shaped stringer made of an aluminum alloy and reinforced at its base is studied. A sample is reinforced by a wire placed along the stringer length. Wires made of titanium, nickel, and 30KhGSA steel were used a reinforcing material. Wires of two diameters, namely, 4 and 6 mm, are considered for each material. For each case, we performed numerical and analytical estimations of the temperature stresses in the composite stringer, which are caused by cooling from 500 to 0°C. The numerical calculation is conducted by the finite-element method with the Femap and Nastran software packages. The analytical calculation is executed using Hooke’s law with allowance for temperature terms and the Lamé solution. The stringer–core combination, where the core is inserted in the stringer without interference, is analyzed. Equivalent stress distributions in the stringer and the core are obtained for all versions under study. The strengths of all versions of reinforcing are estimated.