Results 261 to 270 of about 3,263,406 (307)

A Numerical and Experimental Methodology to Characterize the Gaseous Cavitation in Spool Valves With U-Notches

Journal of Fluids Engineering, 2021
Abstract The performance of spool valves can deteriorate and noise can occur due to cavitation. The noise sound levels caused by cavitation are influenced by many parameters, among which the most important is not-optimal geometry of components.
Emma Frosina, Gianluca Marinaro, Amedeo Amoresano, Adolfo Senatore   +3 more
openaire   +2 more sources

The acoustics of cavitation in spool valve with U-notches

Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering, 2011
Spiral cavity produced by the swirling flow is observed in spool valve with U-notches. Individual bubbles with similar grown-up size appear in the wake of the fixed cavity. Consecutive bubble collapse produces frequency peak in the spectra, which decreases with the cavitation number.
L Lu, J Zou, X Fu
openaire   +1 more source

Prediction on fatigue life of U‐notched PMMA plate

Fatigue & Fracture of Engineering Materials & Structures, 2016
AbstractIn this paper, fatigue life prediction of U‐notched polymethyl methacrylate (PMMA) plate is numerically investigated based on the combination of fatigue damage mechanism and fatigue crack propagation mechanism. First, strength and stiffness degeneration criterions during the fatigue process are established on the basis of nonlinear progressive ...
W. Liu, X. Yao, Y. Ma, X. Chen, G. Guo, L. Ma   +5 more
openaire   +1 more source

Failure criteria for linear elastic materials with U-notches

International Journal of Fracture, 2006
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Gómez, F. J., Guinea, G. V., Elices, M.
openaire   +2 more sources

The influence of dielectric constant on bandwidth of U-notch microstrip patch antenna

2010 IEEE International Conference on Ultra-Wideband, 2010
A rectangle patch antenna with U-notch is a practical method to improve the bandwidth of microstrip antennas bandwidth. If special material substrate and add matching network are combined, which not only reduce the quality factor of antenna, but also produce maximum output power for little reflection of load.
Linxi Zhang, Qi Zhang, Chufeng Hu
openaire   +1 more source

Geometry effects on mode I brittle fracture in U‐notched specimens

Fatigue & Fracture of Engineering Materials & Structures, 2020
AbstractThe effects of geometrical constraints on the fracture initiation location and the fracture strength are evaluated in U‐notched specimens using theoretical and experimental analyses. It is proven that high geometrical constraints in pure mode I loading of geometrically symmetric U‐notched specimens can result in occurrence of the maximum ...
Robab Bahadori, Majid R. Ayatollahi, Nima Razavi, Filippo Berto   +3 more
openaire   +1 more source

Elasto-Plastic Finite Element Analysis of Isotropic Plates With U-Notches

Reliability, Stress Analysis, and Failure Prevention Issues in Fastening and Joining, Composite and Smart Structures, Numerical and FEA Methods, and Risk Minimization, 1996
Abstract Elasto-plastic stress analysis of the U-notched isotropic steel plates (SAE 1060) has been carried out using the finite element method (FEM) Isoparametric rectangular elements with four nodes have been employed and the Lagrange polynomial has been used as interpolation function Mechanical properties and yield strength of the U ...
Nurettin Arslan, Aydın Turgut, Erol Sancaktar   +2 more
openaire   +1 more source

Plastic instability in U-notched bend specimens of spheroidized AIS11090 steel

Metallurgical Transactions A, 1982
Studies on U-notched bend specimens of spheroidized AISI 1090 steel revealed that plastic instability initiated as a surface roughening in the notch root. The surface waviness preceded subsurface void formation and appeared at a strain in fair agreement with predictions from plasticity theory.
O. A. Onyewuenyi, J. P. Hirth
openaire   +1 more source