Publications de Konstantinos Karapiperis

Publications associées (6)

Nonlinear two-scale beam simulations accelerated by thermodynamics-informed neural networks

We introduce an efficient computational framework for the simulation of complex beam networks and architected materials. At its core stands a thermodynamics-informed neural network, which serves as a surrogate material model for the cross-sectional respons ...

2024

t-PiNet: A thermodynamics-informed hierarchical learning for discovering constitutive relations of geomaterials

Konstantinos Karapiperis

More attention has been paid to integrating existing knowledge with data to understand the complex mechanical behaviour of geomaterials, but it incurs scepticism and criticism on its generalizability and robustness. Moreover, a common mistake in current da ...

2025

Enhanced Deformability Through Distributed Buckling in Stiff Quasicrystalline Architected Materials

Konstantinos Karapiperis

Architected materials achieve unique mechanical properties through precisely engineered microstructures that minimize material usage. However, a key challenge of low-density materials is balancing high stiffness with stable deformability up to large strain ...

2025

Deciphering necking in granular materials: Micromechanical insights into sand behavior during cycles of triaxial compression and extension

Edward Carlo Giorgio Andò, Konstantinos Karapiperis

This study elucidates the fundamental governing mechanisms behind necking instability in granular materials, a phenomenon extensively documented in the literature yet lacking a clear explanation of its underlying causes. Our findings suggest that the pheno ...

2025

A conforming frictional beam contact model

Konstantinos Karapiperis

We develop a model for predicting the mechanical behavior of a system of slender one-dimensional bodies (fibers or beams) interacting via frictional contact. Relying on an integral penalty-based formulation, it can robustly capture the behavior in the case ...

2024

Sand Behavior upon Alternating Triaxial Compression and Extension: A Multiscale Analysis Using LS-DEM

Konstantinos Karapiperis

This study investigates the underlying mechanisms causing necking instability in granular materials. Using a digital twin created with the level-set discrete element method (LS-DEM), we simulate triaxial compression and extension cycles on a Hostun sand sp ...

IOP Publishing2025