منابع مشابه
Experimental study of strain fields during shearing of medium and high strength steel sheet
Background: There is a shortage of experimentally determined strains during sheet metal shearing. These kinds of data are a requisite to validate shearing models and to simulate the shearing process. Methods: In this work, strain fields were continuously measured during shearing of a medium and a high strength steel sheet, using digital image correlation. Preliminary studies based on finite ele...
متن کاملExperimental study of forces and energies during shearing of steel sheet with angled tools
Background: Shearing is a fast and inexpensive method to cut sheet metal that has been used since the beginning of the industrialism. Consequently, published experimental studies of shearing can be found from over a century back in time. Recent studies, however, are due to the availability of low-cost digital computation power, mostly based on finite element simulations that guarantees quick re...
متن کاملNonaxisymmetric stability in the shearing sheet approximation
Aims. To quantify the transient growth of nonaxisymmetric perturbations in unstratified magnetized and stratified non-magnetized rotating linear shear flows in the shearing sheet approximation of accretion disc flows. Methods. The Rayleigh quotient in modal approaches for the linearized equations (with time-dependent wavenumber) and the amplitudes from direct shearing sheet simulations using a ...
متن کاملDensity waves in the shearing sheet III. Disc heating
The problem of dynamical heating of galactic discs by spiral density waves is discussed using the shearing sheet model. The secular evolution of the disc is described quantitatively by a diffusion equation for the distribution function of stars in the space spanned by integrals of motion of the stars, in particular the radial action integral and an integral related to the angular momentum. Spec...
متن کاملDensity waves in the shearing sheet I. Swing amplification
The shearing sheet model of a galactic disk is studied anew. The theoretical description of its dynamics is based on three building blocks: Stellar orbits, which are described here in epicyclic approximation, the collisionless Boltzmann equation determining the distribution function of stars in phase space, and the Poisson equation in order to take account of the self–gravity of the disk. Using...
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ژورنال
عنوان ژورنال: Journal of the Japan Society of Precision Engineering
سال: 1954
ISSN: 0374-3543
DOI: 10.2493/jjspe1933.20.291