dent


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dent

1. a toothlike protuberance, esp the tooth of a sprocket or gearwheel
2. Textiles the space between two wires in a loom through which a warp thread is drawn

compressor blade damage

compressor blade damageclick for a larger image
Various types of damages that compressor blades can sustain. Only one or two may take place simultaneously though these have been combined in this illustration.
The various types of damages to compressor blades and their appearances are as follows:
i. Bend. The blade gives the appearance of ragged edges. Smooth repair of the edges or surface in question can be carried out, but the extent of the damage that can be repaired is limited.
ii. Bow. The main source of this type of damage is a foreign object. The blade is bent at the tips and the edges.
iii. Burning. The damage is caused by overheating. The surface of the blade is discolored. If the overheating is severe, there may be some flow of material as well.
iv. Burr. A ragged or turn-out edge is indicative of this type of damage. This takes place during the grinding or cutting operation of the blade at the manufacturing stage.
v. Corrosion. Oxidants and corrosive agents, especially moisture present in the atmosphere, are the main reasons for the corrosion or pitting of the blades. Normally, regular washing is sufficient to prevent it. The blade gives a pitted appearance, and there is some breakdown of the surface of the blade. Also called pitting.
vi. Cracks. Excessive stress from shocks, overloading, or faulty processing of blades during manufacturing can cause cracks and result in their fracture.
vii. Dent. These can be caused by FOD (foreign-object damage) or strikes by dull objects like those in bird strikes. Minor dents can be repaired.
viii. Gall. This type of damage is from the severe rubbing of blades, in which a transfer of metal from one surface to another takes place.
ix. Gouging. The blade gives the appearance of displacing material from its surface, and a tearing effect is prominently visible. This type of damage is from the presence of a comparatively large cutting material or foreign body between moving parts.
x. Growth. The damage manifests itself in the form of elongation of the blades. Growth type of damage takes place because of continued and/or excessive heat and centrifugal force.
xi. Score. Deep scratches are indicative of scoring, which is caused by the presence of chips between surfaces.
xii. Scratch. Narrow and shallow scratches are caused by sand or fine foreign particles as well as by mishandling the blades.
xiii. Pitting. Pitting takes place because of atmospheric corrosion, especially seawater. The surface of the blade shows signs of pitting.
References in periodicals archive ?
While the diameter of indenter was changed to 80mm to maintain a larger dent depth.
A pipeline dent becomes an immediate concern if the dent is severe or sharp enough to induce cracking.
Mr Dent moved onto the events of October 17, the day before Pickering had a birthday party.
Finally:"Police said Dent refused to put his hands behind his back.
Il faut que la tete de la brosse a dent soit petite pour que l'enfant puisse brosser jusqu'au fond de sa bouche sans difficultes.
What other places might Dent stop through on his way there?
Once they were into the scuffle he did not look for an opportunity to bite Mr Dent.
A scuffle broke out and during the fight Mr Dent put his hand in the defendant's mouth.
CARDIFF-BASED Boyes Rees Architects has secured a contract to design a new Waitrose supermarket and the relocation of the existing Dents glove factory in Warminster.
Dent, originally from North Yorkshire and based near Middleham, has been in and around racing stables for much of his life and all his working career, which has taken him to Newmarket and back to the north, most recently as head groom to Howard Johnson and Karl Burke.
Figure 7 is a photograph of a typical dent where the elliptical affected area and circular flattened area are marked for clarity.
Dent also had to come from a set down to beat Andrey Golubev, of Kazakhstan, 4-6 6-3 7-6.