Results 1 to 10 of about 332,176 (120)

Effect of Crack and Cutout on Vibration Characteristics of A Laminated Composite Plates Using Nonlinear Finite Element Analysis [PDF]

open access: yesEngineering and Technology Journal, 2011
A nonlinear finite element model for geometrically large amplitude free vibration analysis of composite laminated plate using high order shear deformation theory used in this work. The aim of the study is to analyze the effect of the stationary crack and
Nabil Hassan Hadi, Kayser Aziz Ameen
doaj   +1 more source

Self-Organized Nanostructures Generated on Metal Surfaces under Electron Irradiation

open access: yesQuantum Beam Science, 2021
Irradiation of high-energy electrons can produce surface vacancies on the exit surface of thin foils by the sputtering of atoms. Although the sputtering randomly occurs in the area irradiated with an intense electron beam of several hundred nanometers in
Keisuke Niwase
doaj   +1 more source

Theoretical studies on the nature and conditions of interaction of heel and peripheral nose cones of offset roller cone bits with a bottom hole

open access: yesГорные науки и технологии, 2022
An offset of roller cone rotation centerlines is used to increase the mechanical penetration rate while drilling in soft rocks. This enables increasing the area of a cutting structure teeth contact with a bottom hole.
D. A. Boreiko   +2 more
doaj   +1 more source

A comparative study of hole and electron inversion layer quantization in MOS structures [PDF]

open access: yesSerbian Journal of Electrical Engineering, 2010
In this paper, an analytical model has been developed to study inversion layer quantization in nanoscale Metal Oxide Semiconductor Field Effect Oxide p-(MOSFET). n-MOSFETs have been studied using the variation approach and the p-MOSFETs have been studied
Chaudhry Amit, Roy Nath Jatinder
doaj   +1 more source

Structural Optimization of Self-Supporting Rectangular Converging-Diverging Tube Heat Exchanger

open access: yesEnergies, 2022
A three-dimensional numerical investigation of turbulent heat transfer and fluid flow characteristics of the new heat exchanger and self-support of a rectangular converging-diverging (SS-RCD) tube bundle heat exchanger with different inserts was ...
Feng Jiao   +3 more
doaj   +1 more source

Quantitative identification of failure behaviors of 3D printed rock-like specimen containing a single hole and double cracks

open access: yesRock and Soil Mechanics, 2021
In order to investigate the mechanical properties and failure mechanisms of the rock containing a single hole and double cracks, we used the 3D sand printing technique to prepare the rock-like specimens.
LIU Xiang-hua   +4 more
doaj   +1 more source

Collective Excitations of 14N and 10B Nuclei [PDF]

open access: yesKirkuk Journal of Science, 2016
The nuclear structure of 14N and 10B nuclei are studied in framework two collective excitation approximations. The first approximation is hole-hole Tamm-Dancoff Approximation (hh TDA) and the second is hole-hole Random Phase Approximation (hh RPA).
Abdullah H. Ibrahim, Ali H. Taqi
doaj   +1 more source

Shear buckling of ship plates with different holes

open access: yesMechanics & Industry, 2022
Based on the first-order shear deformation theory, numerical methods and mechanical experiments, the shear buckling characteristics of hull plates with different holes are investigated.
Zhu Zhaoyi   +3 more
doaj   +1 more source

Simple Modification of a Commercial Laser Triangulation Sensor for Distance Measurement of Slot and Bore Side Surfaces

open access: yesSensors, 2021
The aim of the research is to analyze the possibility of the development and realization of a common laser triangulation sensor arrangement-based probe for the measurement of slots and bore sides with the help of a mirror attachment.
Jan Hošek, Petr Linduška
doaj   +1 more source

Numerical Analysis of Perforated Symmetric Fissures on Mechanical Properties of Hole-Containing Sandstone

open access: yesApplied Sciences, 2023
The symmetrical fissures located within the surrounding rock of the roadway (borehole) in tunnel engineering activities can easily induce damage and instability of the surrounding rock. Therefore, studying the impact of perforated symmetrical fissures on
Hong Gou   +5 more
doaj   +1 more source

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