Results 101 to 110 of about 164,309 (313)
International Journal of Adaptive Control and Signal Processing, EarlyView.This article proposes a convergent adaptive observer for a damped wave PDE and an infinite‐dimensional ODE coupled in cascade using sampled‐in‐space ODE state measurements. The proposed observer estimates the distributed states of the PDE and ODE along with unknown PDE parameters and spatial input.
Zehor Belkhatir +2 more
wiley +1 more source
Discrete Element Modelling of Drag Finishing
Procedia CIRP, 2015 Drag finishing is a machining process that is used to improve the surface topology of workpieces. Workpieces are moved through a bulk of differently shaped abrasives, the so called media. Material removal is caused by the relative motion between workpiece and media.
Uhlmann, Eckart +2 more
openaire +1 more source
An adaptive finite element approximation of a variational model of brittle fracture [PDF]
, 2010 The energy of the Francfort–Marigo model of brittle fracture can be approximated, in the sense of Gamma-convergence, by the Ambrosio–Tortorelli functional.
Christoph Ortner +8 more
core +1 more source
Advanced Engineering Materials, EarlyView.Predicting extreme defects in additive manufacturing remains a key challenge limiting its structural reliability. This study proposes a statistical framework that integrates Extreme Value Theory with advanced process indicators to explore defect–process relationships and improve the estimation of critical defect sizes. The approach provides a basis for
Muhammad Muteeb Butt +8 more
wiley +1 more source
Laser Powder Bed Fusion of Alumina: Effects of Scanning Strategies on External and Internal Defects
Advanced Engineering Materials, EarlyView.This study investigates how scanning strategies affect pure alumina in laser powder bed fusion. Linear 45° scanning yields uniform surfaces but high porosity, while the island‐concentric strategy provides higher density with through‐holes favorable for infiltration. Findings highlight pathways toward optimizing defect‐free alumina parts.
Mohamed Abdelmoula +7 more
wiley +1 more source
Track ballast modelling by discrete element method
Građevinar, 2019 An increase in axle load and travel speed causes faster degradation of track structure and, hence, of the ballast prism. Crushing of stone grains in ballast due to excessive contact forces among these grains causes degradation in the form of filling of ...
doaj +1 more source
Investigation of parameters influencing erosive wear using DEM
Friction, 2019 The effects of several parameters on the erosive wear were studied using the discrete element method (DEM). The Finnie model was implemented using an open-source code.
Akbar Jafari, Reza Abbasi Hattani
doaj +1 more source
Discrete element modelling of vibrating screens
Minerals Engineering, 2018 Abstract Screening is one of the most widely used unit operations in mineral processing plants. In crushing circuits, the proper selection and sizing, optimization and their operation as efficient as possible are essential in terms of the performance and profitability of the crushing circuit and the whole plant.
Harzanagh, Ahad Aghlmandi +2 more
openaire +2 more sources
3D coupling approach between discrete and continuum models for dynamic simulations (DEM–CNEM) [PDF]
, 2013 The coupling between two dissimilar numerical methods presents a major challenge, especially in case of discrete–continuum coupling. The Arlequin approach provides a flexible framework and presents several advantages in comparison to alternative ...
CHARLES, Jean-Luc +5 more
core +1 more source
A Workflow to Accelerate Microstructure‐Sensitive Fatigue Life Predictions
Advanced Engineering Materials, EarlyView.This study introduces a workflow to accelerate predictions of microstructure‐sensitive fatigue life. Results from frameworks with varying levels of simplification are benchmarked against published reference results. The analysis reveals a trade‐off between accuracy and model complexity, offering researchers a practical guide for selecting the optimal ...
Luca Loiodice +2 more
wiley +1 more source