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Enhanced acoustic insulation properties of composite metamaterials having embedded negative stiffness inclusions (2016)
Journal Article
Chronopoulos, D., Antoniadis, I., & Ampatzidis, T. (2017). Enhanced acoustic insulation properties of composite metamaterials having embedded negative stiffness inclusions. Extreme Mechanics Letters, 12, https://doi.org/10.1016/j.eml.2016.10.012

Despite the fact that the concept of incorporating Negative Stiffness (NS) elements within mechanical systems was formulated and validated more than 40 years ago, it has only recently received consistent attention. In this work, the design of a layer... Read More about Enhanced acoustic insulation properties of composite metamaterials having embedded negative stiffness inclusions.

Wave propagation in pressurised composite structures with frequency band gap behaviour (2016)
Conference Proceeding
Ampatzidis, T., & Chronopoulos, D. (2016). Wave propagation in pressurised composite structures with frequency band gap behaviour.

In engineering there are numerous examples of structures, such as train rails and airplane fuselages, that present periodicity in their geometry or mechanical properties. It has been observed that this periodicity leads to banded frequency response a... Read More about Wave propagation in pressurised composite structures with frequency band gap behaviour.

Wave steering effects in anisotropic composite structures: direct calculation of the energy skew angle through a finite element scheme (2016)
Journal Article
Chronopoulos, D. (2017). Wave steering effects in anisotropic composite structures: direct calculation of the energy skew angle through a finite element scheme. Ultrasonics, 73, https://doi.org/10.1016/j.ultras.2016.08.020

A systematic expression quantifying the wave energy skewing phenomenon as a function of the mechanical characteristics of a non-isotropic structure is derived in this study. A structure of arbitrary anisotropy, layering and geometric complexity is mo... Read More about Wave steering effects in anisotropic composite structures: direct calculation of the energy skew angle through a finite element scheme.

Acoustic transmission properties of pressurised and pre-stressed composite structures (2016)
Journal Article
Ampatzidis, T., & Chronopoulos, D. (in press). Acoustic transmission properties of pressurised and pre-stressed composite structures. Composite Structures, https://doi.org/10.1016/j.compstruct.2016.06.027

this work was focused on the examination of the effect of the pre-stress, namely tension and pressure, on the wave propagation and acoustic behaviour of composite laminates. The dispersion characteristics of two dimensional layered and sandwich struc... Read More about Acoustic transmission properties of pressurised and pre-stressed composite structures.

Novel stiffeners exploiting internal pressurisation to enhance buckling behaviour under bending loads (2016)
Journal Article
Polenta, V., Garvey, S. D., Chronopoulos, D., Long, A. C., & Morvan, H. (2016). Novel stiffeners exploiting internal pressurisation to enhance buckling behaviour under bending loads. Thin-Walled Structures, 105, https://doi.org/10.1016/j.tws.2016.04.002

The paper proposes a novel type of stiffener designed to bear bending loads by exploiting internal pressure effects. The stiffener is made of two adjacent thin-walled pipes (r/t?50) jointed with a connecting strip. Such a structure is shown to have h... Read More about Novel stiffeners exploiting internal pressurisation to enhance buckling behaviour under bending loads.