Results 21 to 30 of about 2,632 (215)

Brittle material strength and fracture toughness estimation from four-point bending test [PDF]

open access: yesJournal of Theoretical, Computational and Applied Mechanics, 2021
The failure stress under four-point bending cannot be considered as an intrinsic material property because of the well-known size effect of increasing maximum flexural stress with decreasing specimen size.
Aurélien Doitrand   +2 more
doaj   +1 more source

Numerical Investigation on Fracture Initiation Properties of Interface Crack in Dissimilar Steel Welded Joints

open access: yesChinese Journal of Mechanical Engineering, 2020
Fracture toughness property is of significant importance when evaluating structural safety. The current research of fracture toughness mainly focused on crack in homogeneous material and experimental results.
Longfei Zhao   +4 more
doaj   +1 more source

A Study on Pattern Machining Technology for Germanium Materials Using Grooving Machining Process [PDF]

open access: yes한국정밀공학회지
In the optical systems field, key components such as spectroscopic elements often require the use of optical materials with high-refractive indices to achieve miniaturization and lightweight characteristics.
Joong Kyu Ham   +6 more
doaj   +1 more source

Experimental modelling of a mine working failure under nonuniformly distributed compression [PDF]

open access: yesE3S Web of Conferences, 2020
This paper presents a theoretical and experimental study of the fracture of a quasi-brittle geomedium containing a cylindrical opening and subjected to a nonuniformly distributed compressive load.
Suknev Sergey
doaj   +1 more source

Ductile/Brittle Transition of Brittle Materials in Indentation.

open access: yesJournal of the Society of Materials Science, Japan, 2002
The ductile/brittle transition condition in an indentation of brittle materials is derived to utilize the prediction of the ductile mode abrading conditions. By modeling the action of an abrasive as a semi? spherical indentation, the ductile/brittle transition condition is represented by a critical radius (ac) of a spherical indenter: at a larger ...
TANAKA, Yoshio   +3 more
openaire   +2 more sources

Wear experiment on underwater drilling of P110 steel using superhard abrasive core drill

open access: yesJin'gangshi yu moliao moju gongcheng
P110 steel, renowed for its good comprehensive mechanical properties, is widely used as casing in oil and gas wells. However, it is seriously worn when using cemented carbide tools to drill it underwater.
Tao WU, Hui HUANG
doaj   +1 more source

Continuum Damage-Healing and Super Healing Mechanics in Brittle Materials: A State-of-the-Art Review

open access: yesApplied Sciences, 2018
Over the last several years, self-healing materials have become more and more popular in terms of damage reparation. Moreover, a recent theoretical investigation of super healing materials that aims at repairing and strengthening itself was also ...
Chahmi Oucif, Luthfi Muhammad Mauludin
doaj   +1 more source

Atomistic understanding of the variable nano-hardness of C-plane sapphire considering the crystal anisotropy

open access: yesJournal of Materials Research and Technology
Nanoindentation test method is widely used to measure the material hardness, which is a standard test and the effect of measurement error is limited. However, the measured results of the nano-hardness for the same plane of single crystal materials, such ...
Tian Qiu   +7 more
doaj   +1 more source

Brittle-ductile transition stress of different rock types and its relationship with uniaxial compressive strength and Hoek–Brown material constant (m i )

open access: yesScientific Reports, 2023
Rocks deformed at low confining pressure are brittle, which means that after peak stress, the strength declines to a residual value established by sliding friction. The stress drop is the variation between peak and residual values.
Seyed Morteza Davarpanah   +4 more
doaj   +1 more source

Low‐Temperature Imidization of Polyimides (PI) for Scalable Manufacturing of Flexible Wearable Electronics

open access: yesAdvanced Engineering Materials, EarlyView.
Low‐temperature imidization of PEG‐modified polyimide enables fully screen‐printed, roll‐to‐roll fabrication of flexible electrodes on PET substrates, delivering robust mechanical durability and reliable ECG/EMG signal performance for wearable electronics.
Akib Abdullah Khan, Jong‐Hoon Kim
wiley   +1 more source

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