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Fatigue crack propagation
| Глоссарий по тестированию |
Progressive fracture of a material that begins at a discontinuity and increases under repeated cycles of stress. the phenomenon leading to fracture under repeated or fluctuating stresses having a maximum value less than the tensile strength of the material. see also ductile crack propagation. compare brittle crack propagation.
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Progressive, английский
A 1 длительный; 2 про- грессивный (ант. regressive) aspect, assimilation, dissimilation
Discontinuity, английский
- Разрывность (течения, кривой)
- Разрыв (непрерывности); нарушение сплошности; перегиб кривой; разрезность {конструкции) о ~
- [stratigraphy] any interruption in sedimentation, whatever its cause or length, usually a manifestation of nondeposition and accompanying erosion; an unconformity. gg part 629 - glossary 629-24 (430-vi-nssh, 2008)
- An interruption in the normal physical structure or configuration of a part such as cracks, laps, seams, inclusions, porosity. a discontinuity may or may not affect the usefulness of a part. see defect.
- Interruption in the physical structure or configuration of a test object. after nondestructive testing, a discontinuity indication may be interpreted to be a defect. compare defect; indication. discontinuity, artificial: reference discontinuity such as hole, indentation, crack, groove, or notch introduced into a reference standard to provide accurately reproducible indications for determining test sensitivity levels.
- Interruption in the physical structure or configuration of a test object. after nondestructive testing, a discontinuity indication can be interpreted to be a defect.4,7 compare defect; indication. discontinuity, artificial: reference discontinuity such as hole, indentation, crack, groove or notch introduced into a reference standard to provide accurately reproducible indications for determining test sensitivity levels.4 discontinuity, inherent: material anomaly originating from solidification of cast metal. pipe and nonmetallic inclusions are the most common inherent discontinuity and can lead to other types of discontinuities in fabrication.2,5 discontinuity, primary processing: discontinuity produced from the hot or cold working of an ingot into forgings, rods, bars and other shapes.2,5 discontinuity, secondary processing: discontinuity produced during machining, grinding, heat treating, plating or other finishing operations.2,5 discontinuity, service induced: discontinuity caused by the intended use of the part.
- Intentional or unintentional interruption in the physical structure or configuration of a part.1,4 after nondestructive testing, unintentional discontinuities interpreted as detrimental in the host object may be called flaws or defects. compare defect, dislocation and indication.1 discontinuity, artificial: reference discontinuities such as holes, indentations, cracks, grooves or notches that are introduced into a reference standard to provide accurately reproducible indications for determining sensitivity levels.1 discontinuity, primary processing: in metals processing, a material anomaly produced from the hot or cold working of an ingot into forgings, rod and bar.1 discontinuity, service induced: material anomaly caused by the intended use of the part.1 display resolution, thermal: precision with which an instrument displays its assigned measurement parameter (temperature), usually expressed in degrees, tenths of degrees, hundredths of degrees and so forth.3
- Interruption in the physical structure or configuration of a test object. after nondestructive testing, a discontinuity indication may be interpreted as a defect. compare anomaly; defect; indication. drift (electronic): change in output reading of an instrument, usually due to temperature change.
- Interruption in the physical structure or configuration of a test object. after nondestructive testing, a discontinuity indication may be interpreted as a defect. compare anomaly; defect; indication. discontinuity, artificial: reference anomaly such as hole, indentation, crack, groove, or notch introduced into a reference standard to provide accurately reproducible indications for determining test sensitivity levels. see also known discontinuity standard. discontinuity, inherent: material anomaly originating from solidification of metal. pipe, banding, and nonmetallic inclusions are the most common inherent discontinuities and can lead to other types of discontinuities in fabrication. discontinuity, primary processing: discontinuity produced from the hot or cold working of an ingot into forgings, rods, bars, and other shapes. glossary d-e 497 discontinuity, secondary processing: discontinuity produced during machining, grinding, heat treating, plating, or other finishing operations. discontinuity, service induced: discontinuity caused by the intended use of the part. see also brittle crack propagation; creep; ductile crack propagation; fatigue crack propagation.
- Interruption in the physical structure or configuration of a test object. after nondestructive testing, a discontinuity indication can be interpreted to be a flaw or a defect.10 compare defect; indication.5,6 discontinuity, artificial: reference discontinuity such as hole, indentation, crack, groove, or notch introduced into a reference standard to provide accurately reproducible indications for determining sensitivity levels.4
- Interruption in the physical structure or configuration of a test object. after nondestructive testing, a discontinuity indication can be interpreted to be a flaw or a defect.10 compare defect; indication.
Phenomenon, английский
- 1. a fact or situation which can be observed 2. someone or something that is considered to be extraordinary and marvellous
- A condition with various possible causes in which the blood supply to the fingers and toes is restricted and they become cold, white and numb. also called dead man’s fingers, vasospasm [described 1862. after maurice raynaud (1834–81), french physician.] rbc rbc abbr red blood cell rcgp rcgp abbr royal college of general practitioners rcn rcn abbr royal college of nursing rcog rcog abbr royal college of obstetricians and gynaecologists rcp rcp abbr royal college of physicians
- In diabetes mellitus, a swing to a high level of glucose in the blood from an extremely low level, usually occurring after an untreated insulin reaction during the night. it is caused by the release of stress hormones to counter low glucose levels.
- Явление; эффект
Fluctuating, английский
Пульсирующий
Propagation, английский
- Прохождение, распространение (напр, радиоволн)
- An act of causing something to spread or multiply
- Распространение; размножение; продвижение; передача
- Распространение
- The process of distributing an index from a content index server to one or more web servers for the purposes of providing search.
- Advancement of a wave through a medium.
- Advancement of energy or a crack through a medium. see also brittle crack propagation; ductile crack propagation; fatigue crack propagation.
- Movement of a wave through a medium.7,21
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Flow measurement, английский
Determining the extent of leakage by measuring the rate of flow of gas into or out of a system or component under test. see also rotameter.
Electrostatic spraying, английский
Technique of applying a uniform surface coating, wherein the material being sprayed is given a high electrical charge (potential) while the test piece is grounded.
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