4 papers
Modeling Fatigue-Induced Anisotropic Quasi-Brittle Damage Based on the Endurance Surface Concept
Klas Feike, Patrick Kurzeja, Kai Langenfeld +1
This work proposes a novel continuum damage framework for fatigue based on the endurance-surface concept and uses the energy-release rate as the driving force. Damage evolution is…
Modeling isotropic polyconvex hyperelasticity by neural networks -- sufficient and necessary criteria for compressible and incompressible materials
Gian-Luca Geuken, Patrick Kurzeja, David Wiedemann +3
This work investigates different sufficient and necessary criteria for hyperelastic, isotropic polyconvex material models, focusing on neural network implementations for compressib…
Input convex neural networks: universal approximation theorem and implementation for isotropic polyconvex hyperelastic energies
Gian-Luca Geuken, Patrick Kurzeja, David Wiedemann +1
This paper presents a novel framework of neural networks for isotropic hyperelasticity that enforces necessary physical and mathematical constraints while simultaneously satisfying…
Limits of isotropic damage models for complex load paths -- beyond stress triaxiality and Lode angle parameter
K. Feike, P. Kurzeja, J. Mosler +1
The stress triaxiality and the Lode angle parameter are two well established stress invariants for the characterization of damage evolution. This work assesses the limits of this t…