Results 91 to 100 of about 210,578 (312)

Evaluation of frictional suspension system performance in three-piece bogie by the multi-body-system approach [PDF]

arXiv, 2019
The nonlinear damping characteristics of friction wedges in the secondary suspension of a freight bogie are investigated considering unidirectional contact and non-smooth frictional forces. In the proposed MultiBody System model, each wedge has six Degrees of Freedom with corresponding inertial properties. The geometry of wedge, as well as, wedge angle,
arxiv  

Wedge cells for refractometry: materials and parameters selection criteria

Revista Elektrón, 2020
This work presents the materials and parameters selection criteria of wedge cells for refractometry in the visible range. These cells consist of two right angle prisms facing each other, defining a wedge-shaped cavity where the sample is placed.
Patricia María Elena Vázquez, Eduardo Victor Oreglia, Ligia Ciocci Brazzano, Fracisco Ezequiel Veiras, Claudia Leda Matteo, Patricio Anibal Sorichetti   +5 more
doaj   +1 more source

Wedge geometry, frictional properties and interseismic coupling of the Java megathrust

Tectonophysics, 2018
Abstract The mechanical interaction between rocks at fault zones is a key element for understanding how earthquakes nucleate and propagate. Therefore, estimating frictional properties along fault planes allows us to infer the degree of elastic strain accumulation throughout the seismic cycle. The Java subduction zone is an active plate boundary where
Achraf Koulali, Simon McClusky, Phil Cummins, Paul Tregoning   +3 more
openaire   +3 more sources

Numerical Studies of Influencing Factors on the Homogeneity of the Powder Mixture during the Powder Spreading Process of Powder Bed Fusion–Laser Beam/Metal

Advanced Engineering Materials, EarlyView.
AISI 304L stainless steel powder is mixed with silicon nitride (Si3N4) powder and processed by PBF‐LB/M, allowing partial retention of Si3N4. The numerical approach effectively predicts the Si3N4 powder homogeneity and N content distribution on the powder bed. Recent studies have focused on the alloying of nitrogen (N) in high‐alloy stainless steels by
Yuanbin Deng, Ziping Sang, Jiali Zhang, Felix Radtke, Louis Becker, Simone Herzog, Sebastian Weber, Christoph Broeckmann   +7 more
wiley   +1 more source

Development and Validation of a One‐Dimensional Finite Difference Simulation Scheme for Polymer Laser Powder Bed Fusion with Application to the Effect of the Inter Layer Time

Advanced Engineering Materials, EarlyView.
The study presents an efficient simulation approach for the polymer laser powder bed fusion process polymers process, validated with polyamide 12, polyamide 6, and polyetherketoneketone. It shows that inter layer time affects part density, with 90s yielding dense parts.
Claas Bierwisch, Bastien Dietemann, Moritz Grünewald, Christian Schlör, Johannes Rudloff   +4 more
wiley   +1 more source

Ignition criteria and the effect of boundary layers on wedge-stabilized oblique detonation waves [PDF]

arXiv, 2020
Simulations of a supersonic, premixed, reacting flow over a wedge were performed to investigate the effect of a boundary layer on the wedge surface on ignition and stability of oblique detonation waves (ODWs). Two computational domains were used: one containing a wedge of a single angle with a straight after-body, and the other containing a double ...
arxiv  

Development of Ternary Magnesium Alloys for Laser Powder Bed Fusion: Optimizing Oxide Layer Thickness

Advanced Engineering Materials, EarlyView.
Additive manufacturing of magnesium alloys by laser is difficult because the melting point of the oxide layer is much higher than the evaporation temperature of the metal underneath. Making the oxide layer thinner can solve this problem. Alloying magnesium with strontium makes the oxide layer thinner, especially at 0.5 wt%.
Elmar Jonas Breitbach, Stefan Julmi, Sabine Behrens, Tatiana Blank, Arvid Abel, Nicole Emminghaus, Ludger Overmeyer, Christian Klose, Hans Jürgen Maier   +8 more
wiley   +1 more source

Antartic/Scotia plate convergence off southernmost Chile

Geologica Acta, 2007
The southern tip of South America off Chile has suffered a long phase of ocean-continent convergence which has shaped the continental margin through different phases of accretion and tectonic erosion.
A. Polonia, L. Torelli
doaj   +1 more source

Maillard Type Reaction for Electroless Copper Plating onto Ceramic Nanoparticles

Advanced Engineering Materials, EarlyView.
This work presents the manufacturing of copper‐plated ceramic nanoparticles in an environmentally friendly way. Supported by organic functionalizations with pectin an electroless plating step can be performed. Sustainable reagents like xylose, and several amino acids are used for the reduction process.
Lukas Mielewczyk, Julia Grothe, Stefan Kaskel, Heinrich von Lintel, Katja Eichmann, Katrin Jahns, Avinash Hariharan, Abdelrahman Elsayed, Ulrich Krupp   +8 more
wiley   +1 more source

Icephobic Gradient Polymer Coatings Coupled with Electromechanical De‐icing Systems: A Promising Ice Repellent Hybrid System

Advanced Engineering Materials, EarlyView.
A hybrid system for de‐icing made of gradient polymer coatings, deposited on aluminum coupled with an electromechanical system, is demonstrated as an effective and durable strategy for reducing drastically ice adhesion. The system is capable of detaching ice blocks over the coating in less than 1 s, regardless of the ice type and covered area ...
Gabriel Hernández Rodríguez, Giulia Gastaldo, Luca Stendardo, Younes Rafik, Jason Pothin, Marc Budinger, Carlo Antonini, Valérie Pommier‐Budinger, Anna Maria Coclite   +8 more
wiley   +1 more source