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HOOP STRESS [8 records]

Record 1 2019-02-08

English

Subject field(s)
  • Metal Processing
  • Ballistics
CONT

The reduction of compressive yield strength within the yielded zone of an autofrettaged tube is of importance, as on removal of the autofrettage pressure, the region near the bore experiences high values of compressive hoop stress, approaching the magnitude of the tensile yield strength of the material if the unloading is totally elastic.

French

Domaine(s)
  • Transformation des métaux
  • Balistique
CONT

La balistique intérieure permet de déterminer la loi de développement de la pression dans l'âme, et donc de calculer la résistance exigée de la bouche à feu. Cela entraîne généralement le choix d'un tube autofretté, quoiqu'il soit possible d'utiliser aujourd'hui des aciers à haute limite élastique.

Spanish

Save record 1

Record 2 2001-05-17

English

Subject field(s)
  • Launchers (Astronautics)
CONT

The Ausroc 3(A3) launch vehicle has a liquid fuelled motor that burns JA-1 kerosene with liquid oxygen, and uses regenerative cooling. The motor produces 35 kN at sea level and has a burn time of 80 seconds. The motor is gimballed to facilitate pitch and yaw control. The wall of the combustion chamber, throat and expansion nozzle consists of 102 stainless steel tubes stacked side by side running parallel to the motor axis. The tubes will be brazed together and the assembly wrapped in a carbon fibre composite. The composite wrapping is used to relieve to tubes of the hoop stress generated by the combustion pressure(2 MPa), whilst the tubes contain the combustion heat(3500 K). The top end of the motor has a kerosene inlet manifolt, oxygen dome and injector block. The kerosene inlet manifold delivers kerosene to every second motor tube, where it travels down to the arse end of the motor. Here it enters the lower kerosene manifold which is a simple plenum ring. This allows the kerosene to flow into the other alternate tubes which deliver it back up to the inlet manifold. The inlet manifold then directs the kerosene to the injector block, which sprays it and the liquid oxygen into the combustion chamber.

French

Domaine(s)
  • Lanceurs (Astronautique)
CONT

La fusée possède des moteurs à ergols liquides.

Spanish

Save record 2

Record 3 2001-02-27

English

Subject field(s)
  • Vessels (Medicine)
DEF

The force per unit area in the wall of the pipe in the circumferential orientation due to internal hydrostatic pressure.

CONT

Several studies showed that the appearance of the atherosclerosis could be related to the biomechanical and hemodynamic characteristics of the arterial system. The objective of this project is to study this assumption by determining the interactions between the blood flow and the arterial wall from a macroscopic and microscopic point of view. During a pulsated flow of a non-Newtonian liquid in a viscoelastic tube, these interactions appear mainly by a shear stress on the internal face of the wall and by a circumferential constraint in the thickness of the wall.

French

Domaine(s)
  • Vaisseaux (Médecine)
CONT

Plusieurs études ont montré que l'apparition de l'athérosclérose pourrait être liée aux caractéristiques biomécaniques et hémodynamiques du système artériel. L'objectif de ce projet est d'étudier cette hypothèse en déterminant les interactions entre l'écoulement sanguin et la paroi artérielle d'un point de vue macroscopique et microscopique. Lors d'un écoulement pulsé d'un liquide non newtonien dans un tube visco-élastique, ces interactions se manifestent principalement par une contrainte de cisaillement sur la face interne de la paroi et par une contrainte circonférentielle dans l'épaisseur de la paroi.

Spanish

Save record 3

Record 4 1988-11-29

English

Subject field(s)
  • Long-Distance Pipelines
  • Fluid Mechanics and Hydraulics (Physics)

French

Domaine(s)
  • Canalisations à grande distance
  • Mécanique des fluides et hydraulique (Physique)

Spanish

Save record 4

Record 5 1985-04-29

English

Subject field(s)
  • Water Transport

French

Domaine(s)
  • Transport par eau
OBS

radeau de sauvetage.

Spanish

Save record 5

Record 6 1980-09-01

English

Subject field(s)
  • Long-Distance Pipelines

French

Domaine(s)
  • Canalisations à grande distance

Spanish

Save record 6

Record 7 1976-06-19

English

Subject field(s)
  • General Vocabulary
CONT

... f is the hoop stress due to pressure...

French

Domaine(s)
  • Vocabulaire général
OBS

[...] f est la contrainte transversale due à la pression [...]

Spanish

Save record 7

Record 8 1976-06-19

English

Subject field(s)
  • Mechanical Components

French

Domaine(s)
  • Composants mécaniques
OBS

frettage : Action de fretter. Ensemble des frettes entourant une pièce.

Spanish

Save record 8

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