Results 81 to 90 of about 5,478,842 (309)

On the gravity flow of granular materials

International Journal of Mechanical Sciences, 1982
Abstract The governing equations for flow of an incompressible and cohesionless material are solved approximately by a new procedure. In this procedure the equilibrium equations and the yield criterion are satisfied identically through invocation of the Airy stress function and the Sokolovski functions. The problem analysed pertains to radial flow in
MERIC, RA, TABARROK, B
openaire   +2 more sources

Thermomechanical Fatigue and Creep–Fatigue Interaction of Inconel 718 Additively Manufactured by Laser Beam Powder Bed Fusion

Advanced Engineering Materials, EarlyView.
Thermomechanical fatigue tests of laser beam powder bed fusion (PBF‐LB) Inconel 718 show that the additively manufactured material reaches almost the lifetimes of conventionally‐rolled material under no‐dwell conditions. Introducing dwell times at the maximum temperature markedly reduces the lifetimes due to pronounced grain boundary sliding associated
Stefan Guth, Tomáš Babinský, Jan Lars Riedel, Wen Hao Kan, Aijun Huang, Martin Heilmaier, Ivo Šulák   +6 more
wiley   +1 more source

Experimental study of granular bed erosion and sedimentation subjugated to the secondary flow structures in curved ducts

Advances in Mechanical Engineering, 2019
This article presents an experimental study on the dynamic behaviour of granular material that forms the bed of a curved fluid flow passage. The secondary vortex structures induced by the passage curvature profoundly influence the stability of the ...
Claudio Faria Duarte, Nima Nadim, Tilak T Chandratilleke   +2 more
doaj   +1 more source

Combined Process‐ and Phase‐Field‐Simulation to Predict the Microstructure of Single‐Crystal Ni‐Based Superalloys

Advanced Engineering Materials, EarlyView.
A combined finite element and phase‐field approach predicts the evolution of microstructure during the directional solidification of Ni‐based superalloys. The model reveals how withdrawal rate, temperature gradient, and wall thickness control the dendrite spacing, highlighting the strong effect of surface regions in thin sections where dendrite growth ...
Sean Böhm, André B. Baldissera, Rainer Völkl, Uwe Glatzel   +3 more
wiley   +1 more source

Granular heaps [PDF]

EPJ Web of Conferences
A granular heap is formed when grains are continuously poured on a surface. The characteristics of such a heap can vary significantly depending on the pouring protocol. In the present work, we show that the velocity at the base of a granular heap, during
Khan Aqib, Sanyogita, Nott Prabhu R.
doaj   +1 more source

The flow properties of granular magnesia

Journal of Pharmacy and Pharmacology, 1966
Abstract Measurements have been made of the flow of granular magnesium oxide through circular orifices and the equation has been derived. This is a particular form of a more general equation which can be shown to apply to a wide range of materials, A and 1/n being functions of particle size and shape.
T M, Jones, N, Pilpel
openaire   +2 more sources

Pyramidal Structures on Yttria‐Stabilized Zirconia after High Temperature Exposure at 1500°C: New Features on an Old Material

Advanced Engineering Materials, EarlyView.
New features on yttria‐stabilized zirconia after exposure at 1500°C: Newly discovered pyramidal structures on an old material. After exposure at 1550°C on the cross section of YSZ new features, namely pyramidal structures are discovered. These structures grow with time, increase in numbers, appear as singularities, are often arranged in strings, and ...
Doris Sebold, Dylan Jennings, Robert Vaßen   +2 more
wiley   +1 more source

Discrete element analysis on granular material of flow mobility characteristics under the extraterrestrial environment: insight from column collapse test

Yantu gongcheng xuebao
With the increasing interest of countries in deep space exploration, investigating the effect of extraterrestrial environment on the flow mobility and failure mode of granular column collapse, has a vital guiding significance for in-situ resource ...
SHI Anning 1, 2, JIANG Mingjing 3, YANG Gengchao 4, KWOK Chungyee 5, WANG Siyuan 1, LIN Jiayu 1
doaj   +1 more source

Homogenization and dispersion in granular flows [PDF]

EPJ Web of Conferences
Granular mixing in continuous flow conditions remains poorly understood. We investigate mixing in a 2D bidisperse granular system stirred by a rod in a chaotic flow; by tracking individual particles, we characterize exponential stretching, a hallmark of ...
Andrade Klebbert, Jop Pierre, Kolb Evelyne, Deboeuf Stéphanie   +3 more
doaj   +1 more source

Field Report from Collaborative Research Center 1625: Heterogeneous Research Data Management Using Ontology Representations

Advanced Engineering Materials, EarlyView.
A unified research data management framework for heterogeneous materials data is presented. The system integrates multimodal datasets using ontologies and knowledge graphs, enabling interoperability and FAIR (findable, accessible, interoperable, reusable) data principles. By linking data across scales and workflows, it supports reproducible, Artifitial
Doaa Mohamed, Samuel García Vázquez, Behnam Mardani, Victor Dudarev, Alfred Ludwig, Maribel Acosta, Markus Stricker   +6 more
wiley   +1 more source