Zur genauen Berechnung des Anfangsquerschnittes einer Rohrstreifenzugprobe mit parallelen Schmalseiten / To the exact calculation of the initial cross section of a tube strip tensile specimen with parallel narrow ends / Pour calcul précis d’aire de section initiale par un épprouvette de traction pour tubes avec fins parallèles

1980 ◽  
Vol 22 (11) ◽  
pp. 446-446
Author(s):  
Wolfram Alschner
Keyword(s):  
Cross Section ◽  
Tensile Specimen ◽  
Exact Calculation ◽  
Initial Cross Section

Anisotropic Tensile Deformation of Lotus-Type Porous Copper

2011 ◽  
Vol 695 ◽  
pp. 545-548
Author(s):  
Masakazu Tane ◽  
Rika Okamoto ◽  
Hideo Nakajima
Keyword(s):  
Cross Section ◽  
Tensile Deformation ◽  
Tensile Specimen ◽  
Copper Matrix ◽  
Constant Volume ◽  
Incompressibility Condition ◽  
Orientation Direction ◽  
Porous Copper ◽  
Cylindrical Pores ◽  
The Matrix

The tensile deformation of lotus-type porous copper with cylindrical pores oriented in one direction was investigated. Deformation was occured homogeneously in the copper matrix for loadings parallel to the orientation direction of pores (pore direction), while deformation was localized in the matrix around pores for loadings perpendicular to the pore direction. In the case of parallel loading the decrease in cross section of tensile specimen was smaller than that of nonporous copper, because of the constant-volume law (i.e. incompressibility condition) for deformation was not applicable to the deformation of pores. In the case of perpendicular loading, the deformed regions were disconnected and constant-volume law holds only in the matrix around the pores, and thus, the cross section hardly decreases during the tensile deformation.

Bending Instability of a General Cross Section Thin-Wall Tube for Minimal Radius of Curvature Passage

2014 ◽  
Vol 81 (10) ◽  
Author(s):  
Hadas Ziso ◽  
Moshe Shoham
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Elastic Stability ◽  
Radius Of Curvature ◽  
Thin Wall ◽  
Sharp Corner ◽  
Initial Cross Section ◽  
Pure Bending ◽  
Section Shape ◽  
Minimal Radius

This paper describes an analytical tool for the design of thin-wall tubes for passage through minimal radius of curvature trajectory. The design is based on a model of thin-wall tube buckling under pure bending. An extended analytical solution for general initial cross section is found based on Brazier method by energy theory of elastic stability. The model predicts the critical moment, curvature, flattening, and stress and allows choosing the most suitable cross section shape for a specific purpose. For example, tubes with ocular and rounded-ocular cross sections were found suitable for semiflexible applications such as endoscopy, where they elastically cross a sharp corner.

Initial cross section for photodissociation of phosgene on Ag(111)

1990 ◽  
Vol 92 (2) ◽  
pp. 1504-1508 ◽  
Author(s):  
X.‐L. Zhou ◽  
J. M. White
Keyword(s):  
Cross Section ◽  
Initial Cross Section

Innovative bond strength testing of tin-based alloys for sliding bearings on steel supports

2021 ◽  
Vol 63 (6) ◽  
pp. 501-504
Author(s):  
Kenan Sürül ◽  
Paul Beiss ◽  
Okan Akin
Keyword(s):  
Bond Strength ◽  
Layer Thickness ◽  
Cross Section ◽  
Bonding Strength ◽  
Tensile Specimen ◽  
Specimen Geometry ◽  
Strength Testing ◽  
Sliding Bearings ◽  
The Face ◽  
Alternative Specimen

Abstract Since the bonding strength of Babbit alloys to their steel support cannot be measured with Chalmers specimens according to DIN ISO 4386, part 2, if the layer is too thin, an alternative specimen constellation was developed which enables the measurement of the bonding strength of layers as thin as 0.5 mm. The new specimen geometry consists of two coaxially aligned steel cylinders of equal diameter which leave a gap between opposite faces. After pretreatment in a metallic immersion bath of tin or an alloy of tin with 50 wt.-% zinc, the Babbit alloy is poured into the gap. Then the bonded steel cylinders are tensile tested. The force at fracture is divided by the cylinder cross-section yielding the bonding strength. This configuration is termed the face tensile specimen and was successfully tested on three different Babbit alloys. Up to a layer thickness of 1.5 mm the face tensile specimen delivers bonding strength quite comparable to those achieved with Chalmers specimens. Face tensile specimens require less Babbit alloy and are less costly to manufacture.

CONTRIBUTION OF TRANSVERSE GAUGE BOSONS TO HIGGS PRODUCTION AND THE EQUIVALENT VECTOR BOSON APPROXIMATION

1987 ◽  
Vol 02 (04) ◽  
pp. 1025-1034 ◽  
Author(s):  
R.M. GODBOLE ◽  
F. OLNESS
Keyword(s):  
Total Cross Section ◽  
Cross Section ◽  
Vector Boson ◽  
Higgs Production ◽  
Exact Calculation ◽  
Centre Of Mass ◽  
Gauge Bosons ◽  
Boson Approximation

It is shown that for intermediate Higgs masses, in the range 0.3– 0.6 TeV, the contribution σ T of the transversely polarized gauge bosons (V) to the process qq→qqVV→qqH , in the leading log (LL) Equivalent Vector Boson Approximation (EVBA) is comparable to the contribution σ L of the longitudinal ones. As a result the LL EVBA for σ=σ L +σ T overestimates the exact total cross-section by ~100–200 % at the q 1 q 2 centre of mass energies of interest for SSC; viz. 5–10 TeV. An improved formulation of the EVBA leads to modified vector boson densities. These densities lead to an EVBA estimate, including the transverse contributions, which agrees with the exact calculation, for m H as low as 0.3 TeV, within 20–30 % upto quark energies ~5–10 TeV .

XUV Absorption Spectra of Carbon Ions

1988 ◽  
Vol 102 ◽  
pp. 71-73
Author(s):  
E. Jannitti ◽  
P. Nicolosi ◽  
G. Tondello
Keyword(s):  
Absorption Spectra ◽  
Cross Section ◽  
Theoretical Calculations ◽  
Photoionization Cross Section ◽  
Carbon Ions

AbstractThe photoabsorption spectra of the carbon ions have been obtained by using two laser-produced plasmas. The photoionization cross-section of the CV has been absolutely measured and the value at threshold, σ=(4.7±0.5) × 10−19cm2, as well as its behaviour at higher energies agrees quite well with the theoretical calculations.

Elastic Scattering in Electron Microscopy

1973 ◽  
Vol 31 ◽  
pp. 252-253
Author(s):  
J. Langmore ◽  
M. Isaacson ◽  
J. Wall ◽  
A. V. Crewe
Keyword(s):  
Electron Microscopy ◽  
Elastic Scattering ◽  
Cross Section ◽  
Quantum Noise ◽  
Dark Field ◽  
Elastic Cross Section ◽  
Biological Molecules ◽  
Dark Field Microscopy ◽  
Field Systems ◽  
Effects Of Radiation

High resolution dark field microscopy is becoming an important tool for the investigation of unstained and specifically stained biological molecules. Of primary consideration to the microscopist is the interpretation of image Intensities and the effects of radiation damage to the specimen. Ignoring inelastic scattering, the image intensity is directly related to the collected elastic scattering cross section, σɳ, which is the product of the total elastic cross section, σ and the eficiency of the microscope system at imaging these electrons, η. The number of potentially bond damaging events resulting from the beam exposure required to reduce the effect of quantum noise in the image to a given level is proportional to 1/η. We wish to compare η in three dark field systems.

A New Approach to the Demonstration of Oxidase-Localization Using Tannic Acid Or Catechin

1973 ◽  
Vol 31 ◽  
pp. 698-699
Author(s):  
V. Mizuhira ◽  
Y. Futaesaku
Keyword(s):  
Cross Section ◽  
Tannic Acid ◽  
Elastic Fiber ◽  
The Other ◽  
New Approach ◽  
Tissue Block ◽  
Active Reaction ◽  
The Cross

Previously we reported that tannic acid is a very effective fixative for proteins including polypeptides. Especially, in the cross section of microtubules, thirteen submits in A-tubule and eleven in B-tubule could be observed very clearly. An elastic fiber could be demonstrated very clearly, as an electron opaque, homogeneous fiber. However, tannic acid did not penetrate into the deep portion of the tissue-block. So we tried Catechin. This shows almost the same chemical natures as that of proteins, as tannic acid. Moreover, we thought that catechin should have two active-reaction sites, one is phenol,and the other is catechole. Catechole site should react with osmium, to make Os- black. Phenol-site should react with peroxidase existing perhydroxide.

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