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CYCLIC TEST [5 records]

Record 1 1999-07-21

English

Subject field(s)
  • Psychometry and Psychotechnology
  • Examinations and Competitions (Education)

French

Domaine(s)
  • Psychométrie et psychotechnique
  • Docimologie
DEF

Test d'ensembles récurrents d'items de difficulté croissante.

Spanish

Save record 1

Record 2 1995-03-16

English

Subject field(s)
  • Electronic Systems
  • Electronics

French

Domaine(s)
  • Ensembles électroniques
  • Électronique

Spanish

Save record 2

Record 3 1990-09-28

English

Subject field(s)
  • Strength of Materials
  • Engineering Tests and Reliability
  • Plastics Industry
OBS

Resistance to Temperature. ASTM Recommended Practice D 794 describes high-temperature testing for plastics. Only the procedure for heat exposure is specified, the test method being governed by the potential end use. Heat is applied using an oven with controlled air flow and with substantial fresh air intake. Two types of tests are described: continuous heat and cyclic heat. In the former, heat is gradually increased until failure occurs. Failure is defined as a change in appearance, weight, dimension, or other property that alters the material to a degree that it is no longer serviceable for the purpose in question. The test may take minutes to weeks, depending on the rate of temperature increase. The cyclic heat test repeatedly applies heat of a constant value until failure.

French

Domaine(s)
  • Résistance des matériaux
  • Fiabilité, contrôle et essais (Ingénierie)
  • Industrie des plastiques
OBS

Les méthodes d'essai d'endurance thermique sont destinées à déterminer les changements survenus dans les propriétés des matériaux par suite d'une longue exposition à une température élevée.

OBS

Températures et durées d'exposition. Les éprouvettes doivent être soumises à un minimum de trois températures réparties sur une gamme suffisamment étendue pour permettre l'établissement de la relation entre la température et la durée jusqu'à détérioration et pour déterminer le profil d'endurance thermique ou l'indice de température. [On distingue le] vieillissement par cycles [et le] vieillissement continu.

OBS

Essai cyclique. Essai composite dans lequel les mêmes expositions se répètent de façon cyclique [...]

Spanish

Save record 3

Record 4 1982-01-07

English

Subject field(s)
  • Aeroindustry
CONT

Severe cyclic tests, using the most damaging cycles, are being carried out, and problem areas have been found and identified, mostly problems of wear, which, the company told Interavia, could have provided unpleasant surprises in the future had they not been identified in time.

French

Domaine(s)
  • Constructions aéronautiques
CONT

Les essais cycliques les plus sévères sont effectués; ils ont permis de déceler certains problèmes, surtout des phénomènes d'usure, lesquels, aux dires de la société, auraient pu réserver de désagréables surprises s'ils n'avaient été dépistés à temps.

Spanish

Save record 4

Record 5 1976-06-19

English

Subject field(s)
  • Aeroindustry

French

Domaine(s)
  • Constructions aéronautiques
OBS

(soufflante)

Spanish

Save record 5

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