Results 51 to 60 of about 779 (213)

In Situ Micromechanical Study of Bimodal γ′–γ″ Precipitate Assemblies in Ni–Cr–Al–Nb Superalloy

Advanced Engineering Materials, EarlyView.
A Ni–Cr–Al–Nb superalloy with a bimodal γ′–γ″ precipitate distribution is developed. Composite precipitate assemblies form through heterogeneous nucleation, effectively impeding dislocation motion. Micropillar compression reveals high strength at room and elevated temperatures, governed by precipitate shearing, with coupled faulting mechanisms ...
Ujjval Bansal, Tae‐Hyeok Kang, Pyuck‐Pa Choi, Subin Lee, Christoph Kirchlechner   +4 more
wiley   +1 more source

Evaluation of elastic property changes in Karamay oil sand reservoir during thermal stimulation

Energy Science & Engineering, 2019
To obtain a good evaluation of oil sand reservoir deformation and its induced ground subsidence during thermal simulation, elastic property changes with reservoir temperature are desired.
Huiwen Pang, Yan Jin, Yanfang Gao
doaj   +1 more source

Molecular Dynamics Studies of Shape Memory Polymers: From Bead–Spring Models to Atomistic Simulations

Advanced Engineering Materials, EarlyView.
Coarse‐grained (left) and atomistic (right) models of the shape memory polymer ESTANE ETE 75DT3 are shown schematically. The two representations bridge molecular detail and mesoscopic description. Both models capture shape memory behavior, linking segmental mobility and conformational relaxation of anisotropic chains to macroscopic recovery, and ...
Fathollah Varnik
wiley   +1 more source

Nonlinear vibration of functionally graded material sandwich doubly curved shallow shells reinforced by FGM stiffeners. Part 2: Numerical results and discussion

Vietnam Journal of Mechanics, 2017
In part 1, the governing nonlinear dynamic equations of FGM sandwich doubly curved shallow shells reinforced by FGM stiffeners on elastic foundation subjected to mechanical and thermal loading are established based on the first order shear deformation ...
Dang Thuy Dong, Dao Van Dung
doaj   +1 more source

Experimental Characterization and Constitutive Modeling of the Effect of Prior Inelastic Strain on the Viscoplastic Behavior of AD730 at 700 °C

Advanced Engineering Materials, EarlyView.
This study shows that superalloys used in aircraft engine disks become much more prone to deformation at high temperatures if they have been strained during manufacturing. This effect increases with the level of prior strain but eventually reaches a limit.
Fabio Machado Alves da Fonseca, Patrick Villechaise, Malik Durand, Arnaud Longuet, Florent Coudon, Loïc Signor, Julien De Jaeger, Dominique Eyidi, Nathalie Bozzolo, Jonathan Cormier   +9 more
wiley   +1 more source

Effect of Bearing Elastic Deformation on the Turbulent Thermohydrodynamic Lubrication of Misaligned Plain Journal Bearings

مجلة النهرين للعلوم الهندسية, 2014
This paper investigates the effect of bearing shell elastic deformation on the steady state behavior of misaligned journal bearings. Performance trends of elastic and rigid bearings with different degree of misalignment (Dm) have been compared.
Basim Ajeel Abass, Sudad Nori Ghani
doaj  

Predicting Welding Distortion in a Panel Structure with Longitudinal Stiffeners Using Inherent Deformations Obtained by Inverse Analysis Method

The Scientific World Journal, 2014
Welding-induced deformation not only negatively affects dimension accuracy but also degrades the performance of product. If welding deformation can be accurately predicted beforehand, the predictions will be helpful for finding effective methods to ...
Wei Liang, Hidekazu Murakawa
doaj   +1 more source

Modeling Dislocation Cutting of γ′ Precipitates in Ni‐Base Superalloys: Linking Atomistic and Dislocation Dynamics Simulations

Advanced Engineering Materials, EarlyView.
Dislocation cutting of γ′ precipitates in Ni‐based superalloys is investigated by linking atomistic simulations with discrete dislocation dynamics. The critical cutting stress is shown to be governed by the antiphase boundary energy, while line tension effects promote edge‐preferred cutting.
Frédéric Houllé, Siwen Gao, Marc Fivel, Anxin Ma, Daria Smirnova, Sriram Anand, Arun Prakash, Julien Guénolé, Alexander Hartmaier, Erik Bitzek   +9 more
wiley   +1 more source

Elastic and elastic-plastic analysis of multilayer thin films filled with heterogeneous materials

AIP Advances, 2018
Due to the mismatch between the coefficients of thermal expansion (CTE) of two adjacent films, the residual stress was growing up during thermal cycling.
Jiangbo Luo, Yunna Sun, Bo Wang, Zhiyu Jin, Shenyong Yang, Yan Wang, Guifu Ding   +6 more
doaj   +1 more source

INFLUENCE OF ELEVATED TEMPERATURES ON MECHANICAL PROPERTIES OF CONCRETE

International Journal for Computational Civil and Structural Engineering, 2018
he paper considers the influence of elevated temperatures in the range from 20°C to 800°C in the mechanical properties of the concrete the thermal expansion, elastic modulus, shear deformation coefficient, strength.
Vladimir I. Andreev, Lyudmila S. Polyakova   +1 more
doaj   +1 more source