Standard Methods for Aerospace Stress Analysis

13Interior Monuments Analysis and Testing

13.1 Introduction to Interior Monuments

Every aircraft interior layout contains the utility monument and seats. In each location of interior location based on the floor stiffness of the aircraft and the upper secondary structure stiffness, a monument may exert different inertia loading on the primary structure of the aircraft. The procedure is in order to certify this monument, a FEA analysis along with a validation testing procedure, has to be carried out to account for the maximum loads to the primary structure from the monument at flight and emergency landing inertia loading conditions. Here, in this chapter, the essential details of such substantiation efforts are discussed (Figure 13.1).

13.2 Analysis Methods

The monuments are modeled via FEA modeling to simulate the loads on the panels of the monuments and perform stress analysis of the structural panels. Also, to determine the interface loads that are going to be transferred to the aircraft's primary structure at the floor and upper attachment locations.

The panel’s mechanical properties and the stress limits (strength values) are needed to build up the FEA model of the monuments. In Chapter 11, the test procedures for determining the mechanical properties and the stress limits were discussed per ASTM standards. Figure 13.2 illustrates a complete mesh of an interior monument used for simulations and FEA. Notice the upper attachment tie rods and all panel details are in the ...