Results 61 to 70 of about 9,747,200 (282)

An adaptive multiscale algorithm for efficient extended waveform inversion

, 2017
Subsurface-offset extended full-waveform inversion (FWI) may converge to kinematically accurate velocity models without the low-frequency data accuracy required for standard data-domain FWI.
Lei Fu, William W. Symes, Symes, William W., Fu, Lei   +3 more
core   +1 more source

Current Status and Challenges in Data Collection for Aerospace Coatings Deposited by Plasma Spraying

Advanced Engineering Materials, EarlyView.
An innovative approach has been integrated into the GRENAT project to optimize plasma spraying and coating performance. Raw materials are accelerated and melted in the plasma generated by torches, creating coatings. Monitoring sensors collect process data which are combined with ex situ characterization data.
Lila Randriamananjara, Vincent Rat, Quentin Dubreuil, Patrice Valorge, Simon Goutier, Alain Denoirjean, Olivier Messe, Céline Ruelle, Jean‐Philippe Poli   +8 more
wiley   +1 more source

Discrepancies Between Micro Versus Macroscale Viscoelastic Properties in a Microplastic‐Tissue Composite Model

Advanced Engineering Materials, EarlyView.
This study explores the discrepancies between bulk mechanics and spatial mapping in a tissue‐mimetic hydrogel model. Microplastic particles create localized stiff mechanical microenvironments that are detectable by cellular‐scale nanoindentation but leave bulk properties unchanged as measured by rheology.
Ahron T. Verschleisser, Baptiste Le Roi, Omri Leshem, Joshua M. Grolman   +3 more
wiley   +1 more source

In situ stress inversion using nonlinear stress boundaries achieved by the bubbling method

Journal of Rock Mechanics and Geotechnical Engineering
Due to the heterogeneity of rock masses and the variability of in situ stress, the traditional linear inversion method is insufficiently accurate to achieve high accuracy of the in situ stress field. To address this challenge, nonlinear stress boundaries
Xige Liu, Chenchun Huang, Wancheng Zhu, Joung Oh, Chengguo Zhang, Guangyao Si   +5 more
doaj   +1 more source

Inversion of Initial In-situ Stress Field of Underground Caverns of Hydropower Station Based on GD-PSO [PDF]

Zhengzhou Daxue xuebao. Gongxue ban
In view of the difficulty of balancing convergence speed and nonlinear regression accuracy of existing inversion methods, a new method combining gradient descent (GD) and particle swarm optimization (PSO) for inversion analysis of initial in-situ ...
BAO Tengfei, CHENG Jianyue, XING Yu, ZHOU Xiwu, CHEN Yuting, ZHAO Xiangyu   +5 more
doaj   +1 more source

Controlling Grain Growth in Powder Bed Fusion of Yttria‐Stabilized Zirconia Using Femtosecond Lasers: Challenges and Methodological Insights

Advanced Engineering Materials, EarlyView.
Binder‐free laser powder bed fusion of 8YSZ with a femtosecond laser is used to map process windows linking scan strategy, heat accumulation, and grain growth. Time‐resolved thermography and simulations reveal thermal regimes that enable continuous, vitrified, and fine‐grained 8YSZ surface layers without absorptive additives and demonstrate ...
Markus Kühn, Sarah Kaden, Andrea Barz, Daniel Störzner, Jens Bliedtner, Andrés Fabián Lasagni   +5 more
wiley   +1 more source

A stress free model for residual stress assessment using thermoelastic stress analysis [PDF]

, 2014
Thermoelastic Stress Analysis (TSA) has been proposed as a method of obtaining residual stresses. The results of a preliminary study demonstrated that when Al-2024 plate containing holes that were plastically deformed by cold expansion process to 2% and ...
Robinson, Andy, Howell, Geoff, Dulieu-Barton, Janice, Achintha, Mithila   +3 more
core   +1 more source

Classification, identification and monitoring methods for static-dynamic stress hazard sources of rock burst in coal mine

Meitan kexue jishu
The prevention and control of rock burst in coal mines should begin from the source, where classification identification and monitoring of static-dynamic stress hazard sources are essential prerequisites for rock burst source control. Based on the theory
Linming DOU, Zhenyu SUN, Anye CAO, Zonglong MU, Siyuan GONG, Wu CAI, Zhifeng MA, Jiazhuo LI, Kunyou ZHOU   +8 more
doaj   +1 more source

Simulation‐Based Analysis of Insert Pull‐Out in Nickel‐Polyurethane Hybrid Foams Using CT‐Derived Geometries

Advanced Engineering Materials, EarlyView.
CT‐based finite element simulations combined with in situ X‐ray computed tomography are used to analyze insert pull‐out in nickel‐coated polymer foams. Despite variations in material parameters, deformation consistently concentrates within a narrow annular region around the insert.
Yannik Bautz, Jonas Fell, Hendrik Jost, Stefan Diebels, Hans‐Georg Herrmann   +4 more
wiley   +1 more source

CHESS-grain-solved-stress-field

, 2018
Grain-resolved stress fields for 316L cast, 316L PM-HIP, Inconel 625 cast and Inconel 625 PM-HIP alloys. The experiment was conducted at the CHESS F2 beamline in Jan-Feb. 2017 using far-field High Energy Diffraction Microscopy.
Donna Guillen (7007801)
core   +1 more source