Results 31 to 40 of about 1,153,519 (387)

Electrochemical Characterization and Inhibiting Mechanism on Calcium Leaching of Graphene Oxide Reinforced Cement Composites

open access: yesNanomaterials, 2019
Calcium leaching is a degradation progress inside hardened cement composites, where Ca2+ ions in cement pore solution can migrate into the aggressive solution.
Wu-Jian Long   +3 more
doaj   +1 more source

Numerical Approach to Optimize the Dynamic Behaviour of Structures Considering Structural Durability

open access: yesVibration, 2023
In the design of lightweight structures, both the dynamics and durability must be taken into account. In this paper, a methodology for the combined optimization of structural dynamics, lightweight design, and lifetime with discrete vibration engineering ...
William Kaal   +3 more
doaj   +1 more source

Theoretical backgrounds of durability analysis by normalized equivalent stress functionals [PDF]

open access: yes, 2003
Generalized durability diagrams and their properties are considered for a material under a multiaxial loading given by an arbitrary function of time. Material strength and durability under such loading are described in terms of durability, safety factor ...
Bolotin, V. V.   +13 more
core   +1 more source

Vibration reduction on circular saw blades with vibroacoustic metamaterials [PDF]

open access: yesBulletin of the Polish Academy of Sciences: Technical Sciences, 2023
The presented work focuses on the experimental investigation of a vibroacoustic metamaterial integrated into a spinning circular saw blade. Vibroacoustic metamaterials are a novel technology for broadband vibration reduction. Built from an array of local
Sebastian Rieß   +2 more
doaj   +1 more source

Carbonation and Chloride Ions’ Penetration of Alkali-Activated Materials: A Review

open access: yesMolecules, 2020
Alkali-activated materials (AAMs) are widely recognized as potential alternatives to ordinary Portland cement (OPC) due to their lower carbon footprint.
Xuanhan Zhang   +4 more
doaj   +1 more source

Output-Only Damage Detection of Shear Building Structures Using an Autoregressive Model-Enhanced Optimal Subpattern Assignment Metric

open access: yesSensors, 2020
This paper proposes a novel output-only structural damage indicator by incorporating the pole-based optimal subpattern assignment distance with autoregressive models to localize and relatively assess the severity of damages for sheared structures ...
Liu Mei   +5 more
doaj   +1 more source

Design of a Random Decrement Method Based Structural Health Monitoring System

open access: yesShock and Vibration, 2012
Structural Health Monitoring (SHM) has reached a high importance in numerous fields of civil and mechanical engineering. Promising damage detection approaches like the Damage Index Method, Gapped Smoothing Technique and Modal Strain Energy Method require
H. Buff   +4 more
doaj   +1 more source

Seismic Performance of LRS-FRP–Concrete–Steel Tubular Double Coupling Beam

open access: yesApplied Sciences, 2021
To improve the ductility and seismic performance of a double coupling beam, the authors applied a polyethylene terephthalate (PET) sheet and steel tube to form fiber-reinforced polymer (FRP)–concrete–steel double-skin tubular (DST) composite coupling ...
Lili Sui   +5 more
doaj   +1 more source

Research and Analysis on Present Situation of Desert Sand Concrete [PDF]

open access: yesE3S Web of Conferences, 2021
Due to the rapid development of civil engineering industry, natural medium and coarse sand resources are increasingly scarce. If desert sand is studied and applied in the field of civil engineering, the shortage of sand resources and high unit price can ...
Yanjun Ji, Chuang Liu, Zhichao Ding
doaj   +1 more source

Durability of geopolymers and geopolymer concretes: A review

open access: yes, 2021
Geopolymers are green materials with three-dimensional silicon and aluminum tetrahedral structures that can be serving as environmentally friendly construction materials and therefore have the potential to contribute to sustainable development.
Tian Lingyu   +3 more
semanticscholar   +1 more source

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