Results 41 to 50 of about 33,876 (253)

Mechanical and Acoustic Emission Characteristics of Sandstone through Triaxial Unloading Test after Cyclic Freezing-Thawing Treatment

open access: yesAdvances in Civil Engineering, 2020
The dynamic failure behaviour of tunneling rock in the cold region where freezing-thawing frequently occurs is unclear. This study aimed to test and understand the damage characteristics of tunneling sandstone samples in the cold region via triaxial ...
Xiaohui Ni, Xiaomei Shen, Zhende Zhu
doaj   +1 more source

Engineering properties of basalt aggregates in terms of use in granular layers of flexible pavements

open access: yesCase Studies in Construction Materials, 2022
In this study, it is aimed to increase the level of knowledge about the physical and mechanical properties of basalt aggregates which is produced as crushed-stone in quarries. For this purpose, an experimental study was carried out on aggregates and test
Altan Yılmaz
doaj   +1 more source

Apparatus to Determine Static and Dynamic Elastic Moduli [PDF]

open access: yes, 1984
Conclusions 1. The apparatus makes it possible to concurrently measure ES and ED of cylindrical rock specimens under triaxial conditions in the NX Hoek cell. 2. Accuracy of the apparatus is comparable to usual dynamic modulus testing. 3. Preliminary test
Howarth, D. F.
core   +1 more source

DYNAMIC PROPERTIES OF RIGID POLYURETHANE FOAM IN CYCLIC TRIAXIAL TESTS

open access: yesInternational Journal of GEOMATE, 2021
The aim of this study is to clarify the dynamic properties of rigid polyurethane foam. A method for renovating a deteriorated bridge as a lightweight embankment was proposed. The space underneath a bridge is filled with polyurethane to support the upper structure.
openaire   +1 more source

Self‐Powered Flexible Triboelectric‐Gated Ion‐Gel Transistor for Neuromorphic Tactile Sensing and Human Activity Recognition

open access: yesAdvanced Materials, EarlyView.
A fully flexible ion‐gel‐gated graphene‐channel transistor driven by a triboelectric nanogenerator enables self‐powered tactile sensing and synaptic learning. Mimicking spike‐rate‐dependent plasticity, the device exhibits frequency‐selective potentiation and depression, supporting rate‐coded neuromorphic computation even under flex.
Hanseong Cho   +3 more
wiley   +1 more source

Interaction between collisionless galactic discs and nonaxissymmetric dark matter haloes

open access: yes, 2013
Using $N$-body simulations ($N\sim 10^6 - 10^7$), we examine how a non-axisymmetric dark halo affects the dynamical evolution of the structure in collisionless (stellar) discs.
Bizyaev, D. V.   +4 more
core   +1 more source

Application of wavelet analysis in tool wear evaluation using image processing method [PDF]

open access: yes, 2018
Tool wear plays a significant role for proper planning and control of machining parameters to maintain the product quality. However, existing tool wear monitoring methods using sensor signals still have limitations.
Lee, Woon Kiow   +5 more
core   +1 more source

Recent Advances in Electrospun Nanofibers for Triboelectric Nanogenerators: Performance Enhancement Strategies and Emerging Applications

open access: yesAdvanced Materials, EarlyView.
This review highlights recent advances in electrospun nanofiber‐based triboelectric nanogenerators, emphasizing how material design, fiber architecture, and interface engineering collectively enhance output performance and mechanical durability. Key developments in porous, aligned, core‐shell, and hierarchical nanofibers are discussed alongside ...
MD Fajla Rabbi   +3 more
wiley   +1 more source

Correction of dynamic Brazilian disc tensile strength of rocks under preloading conditions considering the overload phenomenon and invoking the Griffith criterion

open access: yesJournal of Rock Mechanics and Geotechnical Engineering, 2023
Dynamic tensile failure is a common phenomenon in deep rock practices, and thus accurately evaluating the dynamic tensile responses of rocks under triaxial pressures is of great significance.
Kaiwen Xia   +3 more
doaj   +1 more source

Development of a Computer Vision-Based Three-Dimensional Reconstruction Method for Volume-Change Measurement of Unsaturated Soils during Triaxial Testing [PDF]

open access: yes, 2019
Problems associated with unsaturated soils are ubiquitous in the U.S., where expansive and collapsible soils are some of the most widely distributed and costly geologic hazards.
Xia, Xiaolong, Zhang, Xiong
core  

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