European aircraft industry demands for reduced development and operating costs, by 20% and 50% in the short and long term, respectively. Contributions to this aim are provided by the completed project POSICOSS and the running follow-up project COCOMAT, both supported by the European Commission. As an important contribution to cost reduction a decrease in structural weight can be reached by expl...

A hybrid Trefftz finite element (HT FE) model fl~r postbuckling analysis of thin plates is presented, based on a modified variational principle. With the aid of incremental form of equilibrium equations, all non-linear terms may be viewed as pseudo-loads, and then the in-plane and out-of-plane equations can be unoccupied. As a consequence, the solution procedure for the postbuekling plate becom...

the aim of this investigation was to prepare, characterize and optimize the aceclofenac proniosomes using central composite design and carry out stability studies. three independent variables selected were molar ratio of drug to lipid (x1), surfactant loading (x2) and volume of hydration (x3). based on central composite design, 16 batches of proniosomes were prepared by slurry method and evalua...

Delaminations in composite laminates resulting from impact events may be accompanied by minimal indication of damage at the surface. As such, inspection techniques are required to ensure defects are within allowable limits. Conventional ultrasonic scanning techniques have been shown to effectively characterize the size and depth of delaminations but require physical contact with the structure. ...

Abstract Typical thin‐walled structures are found in applications like aircraft, spacecraft and marine vessels. For this type of structure, stability behaviour is crucial. The better understood, the full lightweight potential can be exploited. composite especially, new fast analysis tools for preliminary design required to address issue. Therefore, local postbuckling omega‐stringer‐stiffened pa...

During these few years, several different topics about the microand macromechanics of composite materials and structures have been studied in my research group. They include: defects in composite materials and structures; contact problems; buckling, vibration and control of the composite laminated constructions; aeroservoelasticity of composite wing structures; a novel formalism for the bending...