文档介绍：Analysis of a Casted Control Surface using Bi-Linear
Kinematic Hardening
Abdul Manan
Haroon A. Baluch
AERO, Box 91, Wah Cantt. 47040
Pakistan
Abstract
Control Surfaces or Fins are very essential parts of any aircraft structures for its dynamic stability and
controls. In this case an investigation is carried out for stress analysis on an aluminum fin, manufactured
through sand casting. Pressure due to aerodynamic loads is applied at one face of the fin. It is known from
the experimental tests that permanent deformation occurs in the fin, after unloading. A Bi-Linear Kinematic
material model is taken, to account the material non-linearity in the analysis. Time varying load is applied
over certain period of time. To check the results accuracy two different integration methods, . full and
reduced, are taken into account with tetra elements. After the solution, residual stresses and strains are
plotted, growth and evolution of plastic strains is determined. Experimental tests are conducted on more
than five samples, with same loading conditions. Results pared with experimental test. These two
analyses, experimental and FEM, finally leads to the acceptance criteria for quality check of sand casting.
Introduction
Control surfaces are used for horizontal and lateral stability of any aerospace vehicle. Aerodynamic
loadings are constantly