Results 91 to 100 of about 1,739,887 (337)

The Structural Refinement of Commercial‐Purity Copper Processed by Equal Channel Angular Pressing with Low Strain Amplitude

Advanced Engineering Materials, EarlyView.
Equal channel angular pressing of commercial pure copper under low strain amplitude (≈0.48) induces concurrent continuous and localized discontinuous dynamic recrystallization, forming a duplex structure influenced by strain heterogeneity and recovery. Moderate hardening after 4–12 passes results from progressive high‐angle grain boundary formation via
Paula Cibely Alves Flausino, Nayara A. N. da Silva, Bárbara C. de Almeida, Taise M. Manhabosco, Elaine C. S. Corrêa, Maria T. P. Aguilar, Paulo R. Cetlin   +6 more
wiley   +1 more source

A Comprehensive Review of Additive Manufacturing for Space Applications: Materials, Advances, Challenges, and Future Directions

Advanced Engineering Materials, EarlyView.
Additive manufacturing (AM) transforms space hardware by enabling lightweight, high‐performance, and on‐demand production. This review outlines AM processes—powder bed fusion (PBF), directed energy deposition (DED), binder jetting (BJ), sheet lamination (SL), and material extrusion (ME)—applied to propulsion, satellite structures, and thermal devices ...
Stelios K. Georgantzinos, Eleni Papadopoulou, Grigorios Kostopoulos, Stefanos Voulgaris, Alexandra Tseni, Panteleimon Bakalis, Maria Gkara, Chara C. Mitropoulou, Nikos D. Lagaros   +8 more
wiley   +1 more source

Large Area, Cost‐Effective, and Ultra‐Fast Fabrication of Mini‐Coils Toward Noninvasive Magnetic Applications

Advanced Engineering Materials, EarlyView.
A simple, cleanroom‐free method produces flexible mini‐coils using automated blade cutting. The process is fast, low‐cost, and supports diverse materials. The coils show strong durability and performance under repeated bending. Demonstrated use in resistor‐inductor filters and magnetic nanoparticle control proves their adaptability.
Changhao Ge, Bhavani Prasad Yalagala, Tahereh Masalehdan, Mahdieh Shojaei Baghini, Danijela Gregurec, Hadi Heidari   +5 more
wiley   +1 more source

Nonstandard finite difference schemes for differential equations

Sahand Communications in Mathematical Analysis, 2014
In this paper, the reorganization of the denominator of the discrete derivative and nonlocal approximation of nonlinear terms are used in the design of nonstandard finite difference schemes (NSFDs).
Mohammad Mehdizadeh Khalsaraei, Fayyaz Khodadosti   +1 more
doaj  

Deviation of the Error Estimation for Second Order Fredholm-Volterra Integro Differential Equations

Mathematical Modelling and Analysis, 2016
In this paper we study the deviation of the error estimation for the second order Fredholm-Volterra integro-differential equations. We prove that for m degree piecewise polynomial collocation method, our method provides O(hm+1) as the order of the ...
Reza Parvaz, Mohammad Zarebnia, Amir Saboor Bagherzadeh   +2 more
doaj   +1 more source

Toward Maximum Utilization of Heavy Rare Earths in Sintered Nd–Fe–B Magnets by Grain Boundary Diffusion Source and Application Area Optimization

Advanced Engineering Materials, EarlyView.
In this work, the grain boundary diffusion process is optimized to maximize heavy rare earth utilization by strategic magnetic hardening of areas in the magnet such as corners or edges that are highly susceptible to demagnetization, as demonstrated by finite element magnetostatics simulation on an internal permanent magnet, synchronous traction motor ...
Abdullatif Durgun, Dominik Ohmer, Matthias Katter, Andreas Thul, Simon Steentjes, Hossein Sepehri Amin, Oliver Gutfleisch, Imants Dirba   +7 more
wiley   +1 more source

Requirements and Evaluation of Commercial Digital Light Processing 3D Printers for Upscaled Production of Microstructured Tissue Culture Devices

Advanced Engineering Materials, EarlyView.
Commercial light‐based 3D printers increasingly find use for industry‐scale production of microstructured tissue culture devices. How can commercial printer performance be assessed for a given application? This work introduces simplified quantitative metrics based on microstructural fidelity analysis, addressing key manufacturing challenges in scaling ...
Zoltán András Guller, Freja Høier, Rujing Zhang, Sandra Wilson, Niels B. Larsen   +4 more
wiley   +1 more source

Vortical flow of incompressible viscous fluid in finite cylinder

Mathematical Modelling and Analysis, 2008
The effective use of vortex energy in production of strong velocity fields by different devices is one of the modern areas of applications, developed during the last decade.
Harijs Kalis, Ilmārs Kangro
doaj   +1 more source

Programmable Reconfiguration of Hybrid 4D Chiral Metamaterials via Mechanical and Thermal Stimuli

Advanced Engineering Materials, EarlyView.
A class of hybrid chiral mechanical metamaterials is designed to achieve programmable reconfiguration through soft networks, hinges, and bilayer joints integrated with rigid units. Responsive to mechanical and thermal stimuli, these structures exhibit large volume changes, tunable deformation pathways, and both positive and negative thermal expansion ...
Yunyao Jiang, Siyao Liu, Yaning Li
wiley   +1 more source

Finite differences and determinant identities

Linear Algebra and its Applications, 2009
AbstractDeterminants of higher derivatives of composite functions are evaluated as limits of the corresponding ones concerning finite differences. As examples, several interesting identities of Wronskian and Hankel determinants are consequently derived.
openaire   +3 more sources