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INITIAL TENSION [8 records]

Record 1 2023-01-04

English

Subject field(s)
  • Chemistry
  • Atmospheric Physics
CONT

In cloud physics, it is... of the utmost importance that surface tension should increase the equilibrium pressure with a decreasing-drop radius, while hygroscopic action should reduce it. Thus, only hygroscopie nuclei make the initial condensation phase in air possible.

French

Domaine(s)
  • Chimie
  • Physique de l'atmosphère
DEF

Pression qui permet à deux phases d'une même substance de rester en équilibre.

Spanish

Campo(s) temático(s)
  • Química
  • Física de la atmósfera
Save record 1

Record 2 2015-11-02

English

Subject field(s)
  • Springs (Mechanical Components)
DEF

[A] helically wound wire that contains pitch [and] initial tension to exert energy when a spring is deflected or extended.

CONT

The number of coils on a compression spring are divided into two categories, active and inactive. The active coils do all the work and handle all of the stresses. Use the active coils when doing any calculations for stresses or loads.

French

Domaine(s)
  • Ressorts (Composants mécaniques)
DEF

Spire d'un ressort hélicoïdal qui présente une inclinaison et une tension, ce qui produit de l'énergie lorsque le ressort est comprimé ou étiré.

CONT

Il existe dans un ressort [hélicoïdal] des spires «actives» appelées à se déformer et des «spires inactives» utilisées pour les appuis, avec un passage graduel des unes aux autres par variation de l'angle d'hélice.

Spanish

Save record 2

Record 3 2011-05-24

English

Subject field(s)
  • Properties of Paper
DEF

The resistant property of a sheet to pull or stress produced by tension. It is measured with special jaws, at an apparent initial span of zero. It indicates the strength of the material comprising the fibers.

CONT

The Z-Span 2000 is an automated and computer controlled bench top zero and short span tensile tester. This tester measures 24 peak load zero and/or short span tensile strengths after placing two 4" X 2 1/2"/10 cm 6 cm strips from machine made paper and/or handsheets into feed tray.

French

Domaine(s)
  • Propriétés des papiers
OBS

L'essai de traction définit un ensemble de caractéristiques dont les principales sont : la résistance à la traction R : charge unitaire maximum atteinte au cours de l'essai, exprimée en kilogramme par millimètre carré de la section initiale de l'éprouvette, l'allongement après rupture, la limite d'élasticité dite de proportionnalité, la limite conventionnelle d'élasticité.

Spanish

Save record 3

Record 4 2006-11-09

English

Subject field(s)
  • Thread Spinning (Textiles)
DEF

The lengthening of a crimped fibre or of a textured yarn after development of crimp when it is straightened under specified tension expressed as a percentage of its initial length.

French

Domaine(s)
  • Filature (Textiles)

Spanish

Save record 4

Record 5 2002-11-05

English

Subject field(s)
  • Spacecraft
CONT

Early telemetry from the spin-stabilized IMAGE spacecraft indicated that the vehicle's initial nutation was not decaying. This behavior was especially puzzling because the spacecraft's passive nutation damper behaved as expected while IMAGE was attached to the spinning upper stage.... In a partially-filled ring damper, the excess kinetic energy associated with nutation is dissipated by fluid viscosity when inertial forces cause the liquid to move through the tube. However, post-launch analysis indicated that the IMAGE damper liquid was immobilized by surface tension. This was an unanticipated consequence of the vehicle's low spin rate.

French

Domaine(s)
  • Engins spatiaux

Spanish

Save record 5

Record 6 1996-10-11

English

Subject field(s)
  • Chemistry
CONT

If adsorption equilibrium and mutual saturation of the phases is not achieved instantly, it is possible to distinguish the initial spreading tension.. from the final spreading tension... when equilibrium has been reached. In the case in which... [the initial spreading tension] is positive, while... [the final spreading tension] is negative, the system is said to exhibit autophobicity.

French

Domaine(s)
  • Chimie
CONT

Si l'équilibre d'adsorption et la saturation mutuelle des phases n'est pas atteint instantanément, il est possible de distinguer entre la tension initiale de mouillage, [...] et la tension finale de mouillage [...] atteinte à l'équilibre. Dans les cas où la valeur [...] [de la tension initiale de mouillage] est positive alors que [...] [la valeur de la tension finale de mouillage] est négative, on dit que le système présente de l'autophobicité.

Spanish

Save record 6

Record 7 1988-12-22

English

Subject field(s)
  • Joining Elements (Mechanical Components)
CONT

Unified and American National screw thread standards for screws, bolts, nuts, and other threaded parts consist of six series of threads [UNC or NC; UNF or NF; UNEF or NEF; 8UN or 8N; 12UN or 12N; 16UN or 16N] and a selection of special threads that cover nonstandard combinations of diameter and pitch... The 8-thread series(8N) with 8 threads/in. for all diameters is used on bolts for high-pressure flanges, cylinder-head studs, and other fasteners against pressure, where it is required that an initial tension be set up so that the joint will not open when steam or other pressure is applied. This series has come into general use for many types of engineering work. It is sometimes used as a substitute for the coarse thread series for diameters greater then 1 in.

OBS

"8N": for the American National thread. "8UN": for the Unified National thread.

French

Domaine(s)
  • Éléments d'assemblage (Composants mécaniques)
CONT

[...] un filetage Unified National à filets gros de 1 po de diamètre et de 8 filets au po, se cote : 1-8 UNC [...]

CONT

L'utilisation type des diverses séries est la suivante : [...]. Série à 8 filets. Boulons de serrage pour brides de canalisations sous pression élevée. Goujons pour culasses de moteurs [...]. Cette série remplace la série à filets gros sur les pièces de visserie de plus grandes dimensions.

OBS

Abréviation "8 N" pour le filetage American National et "8 UN" pour le filetage Unified National.

Spanish

Save record 7

Record 8 1975-03-11

English

Subject field(s)
  • Springs (Mechanical Components)
CONT

Springs are often made with an initial tension which causes the coils to be drawn tightly together.

French

Domaine(s)
  • Ressorts (Composants mécaniques)
CONT

La tension initiale obtenue entre les spires adjacentes d'un ressort de traction peut atteindre jusqu'à 25% de la charge de sécurité.

Spanish

Save record 8

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