ETL 1110-2-560
30 Jun 01
Table D-2 (Continued)
Weibull
Standard
Index β
Failure Mode
Life
Examples:
Degradation of mineral
3.0
1.5Y
oil-based lubricant
Degradation of coolants
3.0
1.0Y
Elastomer aging
1.0
4.0-16Y
O-Ring deterioration
1.0
2.0-5Y
Aging of metals under
3.0
4.0Y
thermal stress
Corrosion
Exfoliation
3.0
2.0-4.0Y
Fretting corrosion
2.0
3.0Y
General corrosion
2.0
1.0-3.0Y
Intergranular corrosion
2.0
1.0-3.0Y
Pitting corrosion
2.0
1.0-3.0Y
Rusting
2.0
0.5-3.0Y
Staining
2.0
0.5-3.0Y
Examples:
Accessible Components
2.0
2.0-4.0Y
Inaccessible Components
2.0
2.0-4.0Y
Wear
Abrasion
3.0
0.5-3.0Y
3.0
0.5-3.0Y
Corrosive wear
3.0
0.5-3.0Y
Cutting
3.0
0.5-3.0Y
Embedding
3.0
0.5-3.0Y
Erosion
3.0
3.0Y
Fretting
3.0
2.0Y
Galling
3.0
2.0Y
Grooving
3.0
2.0Y
Gouging
3.0
2.0Y
Pitting
3.0
1.0Y
Ploughing
3.0
1.0Y
Rubbing
3.0
3.0Y
Scoring
3.0
3.0Y
Scraping
3.0
0.5-3.0Y
Scratching
3.0
3.0Y
Scuffing
3.0
1.0Y
Smearing
3.0
1.0Y
Spalling
3.0
0.5-16Y
Welding
3.0
0.5-3.0Y
Examples:
Non-lubed relative movement
3.0
1.0Y
Contaminated by lubed sleeve bearings
3.0
3.0M
Spalling of antifriction
3.0
4.0-16Y
1.1
16.0Y
Displacement/seizing/adhesion:
Adhesion
1.0
Inf
Clinging
1.0
Inf
Binding
1.0
Inf
Blocking
1.0
Inf
Cocking
1.0
Inf
Displacement
1.0
Inf
Freezing
1.0
Inf
Jamming
1.0
Inf
Locking
1.0
Inf
(Sheet 2 of 3)
D-6
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