Abstract A novel methodology is presented for the reliability-based manufacturing cost optimisation of composite aircraft structures. comprehensive bottom-up costing approach employed, enabling precise estimation in terms material, machine, labour, tooling, and indirect costs. This splits process into many individual activities, which can be combined different ways, allowing proposed to applied...

We study the thermal buckling behavior of cylindrical shells reinforced with Functionally Graded (FG) wavy Carbon NanoTubes (CNTs), stiffened by stringers and rings, and subjected to a thermal loading. The equilibrium equations of the problem are built according to the Third-order Shear Deformation Theory (TSDT), whereas the stiffeners are modeled as Euler Bernoulli beams. Different types of FG...

Conducting damage diagnostics on stiffened panels is commonly performed using a single SHM technique. However, each technique has both its strengths and limitations. Rather than straining the expansion of techniques going beyond their intrinsic capacities, these limitations should instead be considered in application. In this work, we propose novel fusion-based methodology between data from two...

The Layerwise Shell Theory is used to model discretely stiffened laminated composite plates and cylindrical shells for stress, vibration, pre-buckling and post-buckling analyses. The layerwise theory reduces a 3-D problem to a 2-D problem by expanding the 3-D displacement field as a function of a surface-wise 2-D displacement field and a 1-D interpolation polynomial through the shell thickness....

The investigation aims at: (i) constructing a modified higher-order shear deformation theory in which Kirchhoff's hypotheses are relaxed, to allow for shear deformations; (ii) validating the present 5-parameter-smeared-laminate theory by comparing the results with exact solutions; and (iii) applying the theory to a specific problem of the postbuckling behavior of a flat stiffened fiber-reinforc...

This research presents a new beam finite element capable of predicting static and dynamic behavior structures with bending-torsion coupling. The model here derived establishes relation between the bending torsional nodal degree freedom two node element. equilibrium equations are neglecting non-linear terms while stiffness mass matrices Galerkin’s method. shape functions obtained considering Tim...

In this paper, a novel multi-fidelity modelling-based optimisation framework is developed for the robust design of composite structures. The proposed provides significant savings on computation time compared to both conventional and high-fidelity modelling methods while maintaining an acceptable level accuracy. Artificial neural networks (ANNs) multi-level approach are incorporated into formula...

Mechanical vibrations induced in flexible structures such as beams and plates have been researched through various optimization functions and control theories to optimize transient response dynamic characteristics. Piezoelectric materials sensors/actuators have been used to reduce and control these vibrations. However, stiffened plate has not been investigated and it is a main and important par...