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Mechanical Properties [PDF]

open access: yes, 2018
This chapter report the most recent experimental results on mechanical behaviour at high temperature of high-performance concretes. After a short introduction, Sect. 5.2 describes the main testing methods that were used in the analysed studies. Section 5.3 collects and compares the temperature-dependency of the compressive strength and modulus of ...
Pimienta, Pierre   +9 more
  +7 more sources

Numerical Investigation of the Influence of Roof-Cutting Parameters on the Stability of Top Coal Gob-Side Entry Retaining by Roof Pre-Fracturing in Ultra-Thick Coal Seam

open access: yesEnergies, 2023
Gob-side entry retaining by roof cutting, a pillarless mining technique, plays a critical role in maintaining continuous production, rapid connection, and enhancing the coal recovery rate in fully mechanized top coal caving working faces.
Yongkang Yang   +3 more
doaj   +1 more source

Development of an Impact Energy Absorption Structure by an Arc Shape Stroke Origami Type Hydraulic Damper

open access: yesShock and Vibration, 2023
Cylindrical hydraulic dampers used to reduce impacts and vibrations typically have linear strokes. In this study, a new arc-shaped stroke-type origami hydraulic damper with a nonlinear damping performance was proposed.
Jingchao Guan   +4 more
doaj   +1 more source

Timely and atomic-resolved high-temperature mechanical investigation of ductile fracture and atomistic mechanisms of tungsten

open access: yesNature Communications, 2021
High-temperature deformation of materials is challenging to evaluate. Here the authors develop a novel device that allows atomic resolved in situ high temperature mechanical tests inside a transmission electron microscope and reveal ductile fracture of a
Jianfei Zhang   +13 more
doaj   +1 more source

Measurement Uncertainty and Representation of Tensile Mechanical Properties in Metals

open access: yesMetals, 2021
The International Organization for Standardization Technical Committee for Metallic Materials—Tensile Testing stated in 2011 that temperature and strain rate variations would induce a change in the results of tensile tests, termed as the measurement ...
Tingdong Xu, Kai Wang, Shenhua Song
doaj   +1 more source

Aerogels for Thermal Protection and Their Application in Aerospace

open access: yesGels, 2023
With the continuous development of the world’s aerospace industry, countries have put forward higher requirements for thermal protection materials for aerospace vehicles.
Runze Jin   +8 more
doaj   +1 more source

A comparative study of rafting mechanisms of Ni-based single crystal superalloys

open access: yesMaterials & Design, 2020
It is known that Ni-based superalloys experience microstructural rafting during high temperature straining. This paper presents a comparative study of the different rafting models by means of finite element modeling and experimentation investigation.
Haibo Long   +11 more
doaj   +1 more source

Mechanical Spark Electrostatic Property Testing Method

open access: yesManagement Systems in Production Engineering, 2023
The article describes an attempt to assess the electrostatic properties of mechanical friction-induced sparking. Such sparks are the cause of numerous accidents in hard coal mines.
Kędzierski Przemysław
doaj   +1 more source

Atomistic mechanism of phase transformation between topologically close-packed complex intermetallics

open access: yesNature Communications, 2022
It is challenging to study how topologically close-packed phases (TCPs) transform between one phase to another. Here the authors use atomic-resolved tools to look at the transformation between μ and P phases, revealing an intrinsic link between seemingly
Huixin Jin   +12 more
doaj   +1 more source

Misfit strain-induced mechanical cracking aggravating surface degradation of LiCoO2

open access: yesMaterials Research Letters, 2023
Cycling-induced cathode interfacial degradations are usually attributed to chemical process, while the physical effect is overlooked to a large extent. Herein, we investigate the failure mechanism of LiCoO2 cathode and reveal that misfit strain plays a ...
Yuyuan Jiang   +9 more
doaj   +1 more source

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