Results 11 to 20 of about 514 (145)

Triggered Ferroelectricity in HfO₂ From Hybrid Phonons and Higher-Order Dynamical Charges. [PDF]

Adv Mater
We combine first‐principles calculations, LGD theory and group theory to demonstrate the mechanism of hybrid‐triggered ferroelectricity in HfO2${\rm HfO}_2$, enabled by trilinear and quadlinear couplings between stable polar and nonpolar modes. HfO2${\rm HfO}_2$ hosts unconventional interplay between structure modes where substantial contribution to ...
Jung S, Birol T.
europepmc   +2 more sources

Identification and Calibration of Advanced Hysteresis Models for Recycled Rubber–Fiber-Reinforced Bearings

Buildings, 2022
Several studies have investigated the feasibility of reducing the implementation cost of base isolation. In this optic, recycled rubber–fiber-reinforced bearings (RR–FRBs) represent a suitable solution for structures in developing countries. Such devices
Amedeo Flora, Andrea Calabrese, Donatello Cardone   +2 more
doaj   +1 more source

Critical Steady-State Response of Single-Degree-of-Freedom Bilinear Hysteretic System under Multi Impulse as Substitute of Long-Duration Ground Motion

Frontiers in Built Environment, 2017
A set of multiple impulses is introduced as a substitute of many-cycle harmonic waves which represent the long-duration earthquake ground motion. A closed-form expression is derived of the elastic–plastic response of a single-degree-of-freedom structure ...
Kotaro Kojima, Izuru Takewaki
doaj   +1 more source

Experimental and Theoretical Investigation of Rotational Behavior of Straight Mortise-Tenon Joints Considering Local Compression Perpendicular to Grain

Buildings, 2023
This paper comprehensively investigates the moment-rotation relationship of straight mortise-tenon joints commonly used in Chinese antique timber buildings, focusing on analyzing the local compression mechanism at the tenon end-mortise and the tenon neck-
Xingxing Liu, Weidong Lu, Kaifeng Liu, Fengyan Xu, Zhibin Ling, Kong Yue   +5 more
doaj   +1 more source

Nonlinear Dynamics of a Vibratory Cone Crusher with Hysteretic Force and Clearances

Shock and Vibration, 2011
Based on the analysis on crushing process and hysteresis of material layers, a hysteretic model with symmetrical clearances is presented. The mechanical model of two-degree of freedom with bilinear hysteresis and its dynamical equations of system are ...
Jing Jiang, Qing-Kai Han, Chao-Feng Li, Hong-Liang Yao, Shu-Ying Liu   +4 more
doaj   +1 more source

Critical Response of Nonlinear Base-Isolated Building Considering Soil-Structure Interaction Under Double Impulse as Substitute for Near-Fault Ground Motion

Frontiers in Built Environment, 2018
The critical nonlinear response considering soil-structure interaction is investigated for a base-isolated building under a double impulse as a substitute for near-fault earthquake ground motions.
Hiroki Akehashi, Kotaro Kojima, Kohei Fujita, Izuru Takewaki   +3 more
doaj   +1 more source

Behaviour Investigation of SMA-Equipped Bar Hysteretic Dampers Using Machine Learning Techniques

Applied Sciences, 2021
Most isolators have numerous displacements due to their low stiffness and damping properties. Accordingly, the supplementary damping systems have vital roles in damping enhancement and lower the isolation system displacement. Nevertheless, in many cases,
Visar Farhangi, Hashem Jahangir, Danial Rezazadeh Eidgahee, Arash Karimipour, Seyed Alireza Nedaei Javan, Hamed Hasani, Nazanin Fasihihour, Moses Karakouzian   +7 more
doaj   +1 more source

Computational modeling of yielding octagonal connection for concentrically braced frames [PDF]

Инженерно-строительный журнал, 2020
Ductility is a feature which allows a structure to undergo large plastic deformations without any strength loss. Yield dampers are energy dissipation devices which increase the ductility and control the vibration of structures by absorbing earthquake ...
F. Nejati, M. Zhian, F. Safar Mashaie, S.A. Edalatpanah   +3 more
doaj   +1 more source

Collapse-Limit Input Level of Critical Double Impulse for Damped Bilinear Hysteretic SDOF System With Negative Post-yield Stiffness

Frontiers in Built Environment, 2019
The collapse-limit input velocity level of the critical double impulse simulating the principal part of near-fault ground motions is derived for an elastic-plastic structure with viscous damping and P-delta effect.
Yoshito Saotome, Kotaro Kojima, Izuru Takewaki   +2 more
doaj   +1 more source

Helical single-walled carbon nanotubes under mechanical and electrostatic loading

Carbon Trends, 2022
Here, we characterize the axial response of helical single-walled carbon nanotubes (HSWCNTs) to mechanical and electrostatic loads, separately. The study considers low-pitch (closed) and high-pitch (open) HSWCNTs of different number of turns in their ...
Aningi Mokhalingam, Shakti S. Gupta
doaj   +1 more source