Results 21 to 30 of about 6,236,215 (252)

Statistical Characterization of Damage of Different Surface P-Wave Velocity Sets under Dynamic Load and Study on Overall Radon Detection Consistency

open access: yesLithosphere, 2021
On the basis of reviewing the existing research status of cumulative damage of the rock mass and summarizing the existing engineering application fields of radon, this paper attempts to apply radon detection technology to the research field of rock ...
Shuai Zhang   +5 more
doaj   +1 more source

A study of composite material damage induced by laser shock waves [PDF]

open access: yes, 2013
A laser shock wave technique has been used to study the damage tolerance of T800/M21 CFRP (Carbon Fiber Reinforced Polymer) composite material with different lay_ups.
BERTHE, Laurent   +7 more
core   +5 more sources

Cell aging preserves cellular immortality in the presence of lethal levels of damage. [PDF]

open access: yes, 2019
Cellular aging, a progressive functional decline driven by damage accumulation, often culminates in the mortality of a cell lineage. Certain lineages, however, are able to sustain long-lasting immortality, as prominently exemplified by stem cells.
Chao, Lin   +4 more
core   +3 more sources

Characterization of Low-Velocity Impact Damage in Asymmetric Composite Shells [PDF]

open access: yesJournal of Applied and Computational Mechanics
Based on numerical modelling, this study investigates asymmetric semicylindrical composite laminate shells' damage characteristics under low-velocity impact loads.
Luis Ferreira, Carlos Coelho, Paulo Reis
doaj   +1 more source

Modelling aeronautical composite laminates behaviour under impact using a saturation damage and delamination continuous material model [PDF]

open access: yes, 2010
We show that the behavior of T700/M21s and T800/M21s composite panels are affected by the influence of strain rates together with local shear and crush punch or global flexural strengths of the structure.
Espinosa, Christine   +4 more
core   +4 more sources

Monitoring of jute/hemp fiber hybrid laminates by nondestructive testing techniques

open access: yesScience and Engineering of Composite Materials, 2016
Damage following static indentation of jute/hemp (50 wt.% total fiber content) hybrid laminates was detected by a number of nondestructive testing (NDT) techniques, in particular, near (NIR) and short-wave (SWIR) infrared reflectography and ...
Sfarra Stefano   +4 more
doaj   +1 more source

Comparative study on damage characterization and damage evolution of rock under uniaxial compression

open access: yesYantu gongcheng xuebao, 2019
The evolution of stress-strain data, acoustic emission (AE) and ultrasonic characteristics of granite under uniaxial compression are synchronously tested by using the ultrasonic wave and AE synchronous monitoring devices.
ZHANG Guo-kai 1,2, LI Hai-bo 2, WANG Ming-yang 1,3, LI Jie 3, DENG Shu-xin 1
doaj   +1 more source

Optically Pumped Magnetometer Measuring Fatigue-Induced Damage in Steel

open access: yesApplied Sciences, 2022
Uniaxial fatigue testing of micro-mechanical metallic specimens can provide valuable insight into damage formation. Magnetic and piezomagnetic testing are commonly used for qualitative characterization of damage in ferromagnetic specimens.
Peter A. Koss   +8 more
doaj   +1 more source

Fabrication and characterizations of proton-exchanged LiNbO3 waveguides fabricated by inductively coupled plasma technique [PDF]

open access: yes, 2006
This Letter reports the use of an inductively coupled plasma technique for fabrication of proton-exchanged (PE) LiNbO3 (LN) waveguides. Planar and stripe waveguides have been formed in Y-cut LN which are difficult to obtain with the conventional molten ...
Hallam, K. R.   +6 more
core   +1 more source

Disaggregation and discretization methods for formation damage estimation in oil and gas fields: an overview

open access: yesDyna, 2020
Formation damage could potentially impede production and injection operations. Hence, characterization and discretization processes of formation damage should be connected to quantification and disaggregation techniques, relying on characterization ...
Oscar E Medina   +6 more
doaj   +1 more source

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