Foto av Stefanos Athanasopoulos

Stefanos Athanasopoulos

Postdoktor

Personlig profil

Forskning

The general scientific field of my PhD project is Geomechanics and more specifically, the mechanics of granular geomaterials (e.g., sands), which is important in a wide range of civil engineering and infrastructure projects (e.g., foundation, tunneling, hydrocarbon exploitation, underground waste disposal, etc.). The objective of the project is to improve the understanding of the micro-mechanisms that lead to degradation and, eventually, failure of these materials during mechanical loading. With such understanding it will be possible to derive improved material models for better numerical simulations of granular media, in general.

In particular, in my research I am working on the development of a new, multiscale experimental approach for studying granular media under load, enabled by the simultaneous application of Neutron Strain Scanning (NSS) and Digital Image Correlation (DIC), using a specially designed plane-strain apparatus. NSS is a diffraction–based technique that has been successfully used to infer the force/stress distribution in polycrystalline materials under load, by measuring the variations in interplanar distances of crystals (i.e., the crystallographic – or grain – strains), whilst DIC is a technique that has been used extensively over the past few decades to derive the strain field of various materials under load. The aim of my research has been, at first, to develop an appropriate experimental set-up to achieve the envisaged combination of measurements within a single experiment and then, to quantitatively associate the traditional macroscale boundary measurements with the mesoscale DIC-derived strain field and the NSS-inferred microscale stress distribution.

Expertis relaterad till FN:s globala mål

2015 godkände FN:s medlemsstater 17 Globala mål för en hållbar utveckling, för att utrota fattigdomen, skydda planeten och garantera välstånd för alla. Den här personens arbete relaterar till följande Globala mål:

  • SDG 11 – Hållbara städer och samhällen
  • SDG 15 – Ekosystem och biologiskt mångfald

Ämnesklassifikation (UKÄ)

  • Teknik och teknologier

Fingeravtryck

Utforska forskningsämnen där Stefanos Athanasopoulos är aktiv. Dessa ämnesetiketter kommer från personens arbeten. Tillsammans bildar de ett unikt fingeravtryck.
  • 1 Liknande profiler

Samarbeten under de senaste fem åren

Externa samarbeten med länder/områden de senaste 5 åren