A recent paper [l] is generalized to a case where the spatial region is taken in @. The region is assumed to be a thin body, such as a panel on the wing or fuselage of an aerospace vehicle. The traditional has well as hp-finite element methods are applied to the surface defined in the z y variables, while, through the thickness, the technique of the p-element is employed. Time and spatial discr...

The fatigue growth of multiple cracks, of arbitrary lengths, emanating from a row of fastener holes in a bonded, riveted, lap joint in a pressurized aircraft fuselage is studied. The effects of residual stresses due to a rivet misfit, and of plastic deformation near the hole, are included. A Schwartz Neumann alternating method which uses the analytical solution for a row of multiple colinear cr...

W ing rock is an oscillatory ro lling motion which arises at high angles of attack in aircraft with highly-swept wings. In the present paper, a method to suppress wing rock through sliding mode control is proposed. Sliding mode control is designed to min imize together roll angle error and command input through a cost function. The procedure is performed on a wing-only analytical model, the con...

Abstract. This article describes the methodology adopted to implement an ILAF control system on a three surface aeroelastic demonstrator with the aim of shaping fuselage modal dynamics. General concepts used, hypotheses formulated and numerical results are provided to show that a numerical simulation involving reduced order models for aeroelastic models is suitable, even at a very early design ...

It is different to detect defect in multilayer structure of an aging aircraft fuselage, pulsed eddy current (PEC) technique has been demonstrated to be capable of quantifying this defect. Based on theoretical analysis of PEC technique, the array probe is designed and the array PEC imaging technique has been supposed to detect corrosion in the multilayer structure. By selecting peak amplitude an...

Over the past two decades, aircraft crashworthiness has seen major developments, mainly with modern computing systems and commercial finite element (FE) codes. The structure material have been designed to absorb more kinetic energy ensure enough safety during a controlled crash condition. However, fuselage section an onboard auxiliary fuel tank requires special arrangements, since inclined stru...