society of plastics engineers europe - vemet · society of plastics engineers europe...
TRANSCRIPT
![Page 1: Society of Plastics Engineers Europe - VeMet · Society of Plastics Engineers Europe Tribologie/polymeren. Friction and wear of plastic products Spoormaker Consultancy in Reliability](https://reader031.vdocuments.net/reader031/viewer/2022022612/5b9c477209d3f29b498c6459/html5/thumbnails/1.jpg)
Wrijving en slijtage van kunststofproducten
Jan Spoormaker
Spoormaker-Consultancy in
Reliability and Liability of
Plastic Products
Society of Plastics Engineers Europe
Tribologie/polymeren
![Page 2: Society of Plastics Engineers Europe - VeMet · Society of Plastics Engineers Europe Tribologie/polymeren. Friction and wear of plastic products Spoormaker Consultancy in Reliability](https://reader031.vdocuments.net/reader031/viewer/2022022612/5b9c477209d3f29b498c6459/html5/thumbnails/2.jpg)
Friction and wear of plastic products
Spoormaker Consultancy in Reliability & Liability of Plastic Products
Dictaat Hfdst. 3 tekst
Friction
Friction is a force that resist relative movements between two surfaces in contact.
Wear
Wear is a process in which interaction of surface(s) or bounding face(s) of a solid with
the working environment results in the dimensional loss of the solid, with loss of
material.
Friction and wear are system properties
Tribology
Science about friction, lubrication and wear
Tribotechnology
Engineering application of tribology
![Page 3: Society of Plastics Engineers Europe - VeMet · Society of Plastics Engineers Europe Tribologie/polymeren. Friction and wear of plastic products Spoormaker Consultancy in Reliability](https://reader031.vdocuments.net/reader031/viewer/2022022612/5b9c477209d3f29b498c6459/html5/thumbnails/3.jpg)
Tribological System according to Czichos
Spoormaker Consultancy in Reliability & Liability of Plastic Products
Relative movement
Gliding, rolling
Load Fn
Velocity v
Ambient temperature
Friction force Fw
Friction coefficient f, μ
Wear h
Friction temperature
Noise
Loads &
environment
Loads &
environment
Tribological
quantities
Surface parameters
Roughness
Macro geometry
1. Body
2. Body
3. Substance
4. Environment
Dictaat Hfdst. 3 Fig. 3.1
![Page 4: Society of Plastics Engineers Europe - VeMet · Society of Plastics Engineers Europe Tribologie/polymeren. Friction and wear of plastic products Spoormaker Consultancy in Reliability](https://reader031.vdocuments.net/reader031/viewer/2022022612/5b9c477209d3f29b498c6459/html5/thumbnails/4.jpg)
- polymerisatie
- ketenopbouw en ketenlengte
- fysische eigenschappen
- kristallisatie
Spoormaker Consultancy in Reliability & Liability of Plastic Products
IO-2040-20081201
Polymeren
Plastics are fantastic, they can fail in many
unexpected ways
![Page 5: Society of Plastics Engineers Europe - VeMet · Society of Plastics Engineers Europe Tribologie/polymeren. Friction and wear of plastic products Spoormaker Consultancy in Reliability](https://reader031.vdocuments.net/reader031/viewer/2022022612/5b9c477209d3f29b498c6459/html5/thumbnails/5.jpg)
Polymeriseren en ketenlengte
additiepolymerisatie
Spoormaker Consultancy in Reliability & Liability of Plastic Products
IO-2040-20081201
![Page 6: Society of Plastics Engineers Europe - VeMet · Society of Plastics Engineers Europe Tribologie/polymeren. Friction and wear of plastic products Spoormaker Consultancy in Reliability](https://reader031.vdocuments.net/reader031/viewer/2022022612/5b9c477209d3f29b498c6459/html5/thumbnails/6.jpg)
Polymeriseren van etheen C2H4 PE
Spoormaker Consultancy in Reliability & Liability of Plastic Products
IO2070-20100215
![Page 7: Society of Plastics Engineers Europe - VeMet · Society of Plastics Engineers Europe Tribologie/polymeren. Friction and wear of plastic products Spoormaker Consultancy in Reliability](https://reader031.vdocuments.net/reader031/viewer/2022022612/5b9c477209d3f29b498c6459/html5/thumbnails/7.jpg)
Polymeriseren van etheen C2H4 PE
Spoormaker Consultancy in Reliability & Liability of Plastic Products
IO2070-20100215
onvertakt
vertakt
![Page 8: Society of Plastics Engineers Europe - VeMet · Society of Plastics Engineers Europe Tribologie/polymeren. Friction and wear of plastic products Spoormaker Consultancy in Reliability](https://reader031.vdocuments.net/reader031/viewer/2022022612/5b9c477209d3f29b498c6459/html5/thumbnails/8.jpg)
Ketenlengte
Spoormaker Consultancy in Reliability & Liability of Plastic Products
Dictaat Hfdst. 3 Fig. 3.1
![Page 9: Society of Plastics Engineers Europe - VeMet · Society of Plastics Engineers Europe Tribologie/polymeren. Friction and wear of plastic products Spoormaker Consultancy in Reliability](https://reader031.vdocuments.net/reader031/viewer/2022022612/5b9c477209d3f29b498c6459/html5/thumbnails/9.jpg)
Ketenlengte
Spoormaker Consultancy in Reliability & Liability of Plastic Products
Dictaat Hfdst. 3 Fig. 3.1
![Page 10: Society of Plastics Engineers Europe - VeMet · Society of Plastics Engineers Europe Tribologie/polymeren. Friction and wear of plastic products Spoormaker Consultancy in Reliability](https://reader031.vdocuments.net/reader031/viewer/2022022612/5b9c477209d3f29b498c6459/html5/thumbnails/10.jpg)
Ketenlengte van PE
Paraffine (500 g/mol ) lijmtube (105 g/mol) UHMW-PE (5.106 g/mol)
Spoormaker Consultancy in Reliability & Liability of Plastic Products
IO2070-20100215
![Page 11: Society of Plastics Engineers Europe - VeMet · Society of Plastics Engineers Europe Tribologie/polymeren. Friction and wear of plastic products Spoormaker Consultancy in Reliability](https://reader031.vdocuments.net/reader031/viewer/2022022612/5b9c477209d3f29b498c6459/html5/thumbnails/11.jpg)
Molecuulmassa - sterkte en viscositeit
Spoormaker Consultancy in Reliability & Liability of Plastic Products
IO2070-20100215
![Page 12: Society of Plastics Engineers Europe - VeMet · Society of Plastics Engineers Europe Tribologie/polymeren. Friction and wear of plastic products Spoormaker Consultancy in Reliability](https://reader031.vdocuments.net/reader031/viewer/2022022612/5b9c477209d3f29b498c6459/html5/thumbnails/12.jpg)
Amorf en semi-kristallijn
Spoormaker Consultancy in Reliability & Liability of Plastic Products
IO2070-20100215
tie-molecule
![Page 13: Society of Plastics Engineers Europe - VeMet · Society of Plastics Engineers Europe Tribologie/polymeren. Friction and wear of plastic products Spoormaker Consultancy in Reliability](https://reader031.vdocuments.net/reader031/viewer/2022022612/5b9c477209d3f29b498c6459/html5/thumbnails/13.jpg)
Kristallisatiesnelheid
Spoormaker Consultancy in Reliability & Liability of Plastic Products
IO2070-20100215parison
![Page 14: Society of Plastics Engineers Europe - VeMet · Society of Plastics Engineers Europe Tribologie/polymeren. Friction and wear of plastic products Spoormaker Consultancy in Reliability](https://reader031.vdocuments.net/reader031/viewer/2022022612/5b9c477209d3f29b498c6459/html5/thumbnails/14.jpg)
wrijving
slijtage
contactoppervlak
vervorming
cohesie en adhesie
Spoormaker Consultancy in Reliability & Liability of Plastic Products
IO-2040-20081201
Pwrijving en slijtage bij kunststoffen
![Page 15: Society of Plastics Engineers Europe - VeMet · Society of Plastics Engineers Europe Tribologie/polymeren. Friction and wear of plastic products Spoormaker Consultancy in Reliability](https://reader031.vdocuments.net/reader031/viewer/2022022612/5b9c477209d3f29b498c6459/html5/thumbnails/15.jpg)
Normal force, drag force and friction force
Spoormaker Consultancy in Reliability & Liability of Plastic Products
Material combination μ, f
PA6 - PA6 (no lubrication)
1.20
PA6 – POM (no lubrication)
0.60
PA6 – PTFE (no lubrication)
0.10
POM – POM (no lubrication)
0.55Dictaat Hfdst. 3 Fig. 3.3
![Page 16: Society of Plastics Engineers Europe - VeMet · Society of Plastics Engineers Europe Tribologie/polymeren. Friction and wear of plastic products Spoormaker Consultancy in Reliability](https://reader031.vdocuments.net/reader031/viewer/2022022612/5b9c477209d3f29b498c6459/html5/thumbnails/16.jpg)
Wear
Spoormaker Consultancy in Reliability & Liability of Plastic Products
Material combination wear factor k
POM – steel (Ra = 0.1 μm) 2 10-15 m2/N
POM – steel (Ra = 0.6 μm) 80 10-15 m2/N
h k p v t
Dictaat Hfdst. 3 Fig. 3.4
![Page 17: Society of Plastics Engineers Europe - VeMet · Society of Plastics Engineers Europe Tribologie/polymeren. Friction and wear of plastic products Spoormaker Consultancy in Reliability](https://reader031.vdocuments.net/reader031/viewer/2022022612/5b9c477209d3f29b498c6459/html5/thumbnails/17.jpg)
Micro contact surface
Spoormaker Consultancy in Reliability & Liability of Plastic Products
Dictaat Hfdst. 3 Fig. 3.5
![Page 18: Society of Plastics Engineers Europe - VeMet · Society of Plastics Engineers Europe Tribologie/polymeren. Friction and wear of plastic products Spoormaker Consultancy in Reliability](https://reader031.vdocuments.net/reader031/viewer/2022022612/5b9c477209d3f29b498c6459/html5/thumbnails/18.jpg)
Deformation
Spoormaker Consultancy in Reliability & Liability of Plastic Products
Dictaat Hfdst. 3 Fig. 3.6
![Page 19: Society of Plastics Engineers Europe - VeMet · Society of Plastics Engineers Europe Tribologie/polymeren. Friction and wear of plastic products Spoormaker Consultancy in Reliability](https://reader031.vdocuments.net/reader031/viewer/2022022612/5b9c477209d3f29b498c6459/html5/thumbnails/19.jpg)
Physical processes cohesion and adhesion
Spoormaker Consultancy in Reliability & Liability of Plastic Products
Bonding forces
Cohesion
Adhesion ----------
Dictaat Hfdst. 3 Fig. 3.9
![Page 20: Society of Plastics Engineers Europe - VeMet · Society of Plastics Engineers Europe Tribologie/polymeren. Friction and wear of plastic products Spoormaker Consultancy in Reliability](https://reader031.vdocuments.net/reader031/viewer/2022022612/5b9c477209d3f29b498c6459/html5/thumbnails/20.jpg)
ruwheid
snelheid
stick-slip effect
Spoormaker Consultancy in Reliability & Liability of Plastic Products
IO-2040-20081201
Wrijving bij kunststoffen
![Page 21: Society of Plastics Engineers Europe - VeMet · Society of Plastics Engineers Europe Tribologie/polymeren. Friction and wear of plastic products Spoormaker Consultancy in Reliability](https://reader031.vdocuments.net/reader031/viewer/2022022612/5b9c477209d3f29b498c6459/html5/thumbnails/21.jpg)
Friction coeeficient as a function of roughness
Spoormaker Consultancy in Reliability & Liability of Plastic Products
High yield strength Low yield strength
Surface roughness Surface roughness
Dictaat Hfdst. 3 Fig. 3.10
![Page 22: Society of Plastics Engineers Europe - VeMet · Society of Plastics Engineers Europe Tribologie/polymeren. Friction and wear of plastic products Spoormaker Consultancy in Reliability](https://reader031.vdocuments.net/reader031/viewer/2022022612/5b9c477209d3f29b498c6459/html5/thumbnails/22.jpg)
Friction coefficient as a function of roughness for
POM and HDPE
Spoormaker Consultancy in Reliability & Liability of Plastic Products
Roughness Ra (μm) Roughness Ra (μm)
Dictaat Hfdst. 3 Fig. 3.11
![Page 23: Society of Plastics Engineers Europe - VeMet · Society of Plastics Engineers Europe Tribologie/polymeren. Friction and wear of plastic products Spoormaker Consultancy in Reliability](https://reader031.vdocuments.net/reader031/viewer/2022022612/5b9c477209d3f29b498c6459/html5/thumbnails/23.jpg)
Friction coefficient as a function of speed
Spoormaker Consultancy in Reliability & Liability of Plastic Products
Speed
Dictaat Hfdst. 3 Fig. 3.12
![Page 24: Society of Plastics Engineers Europe - VeMet · Society of Plastics Engineers Europe Tribologie/polymeren. Friction and wear of plastic products Spoormaker Consultancy in Reliability](https://reader031.vdocuments.net/reader031/viewer/2022022612/5b9c477209d3f29b498c6459/html5/thumbnails/24.jpg)
Mass-spring model
Spoormaker Consultancy in Reliability & Liability of Plastic Products
Dictaat Hfdst. 3 Fig. 3.13
![Page 25: Society of Plastics Engineers Europe - VeMet · Society of Plastics Engineers Europe Tribologie/polymeren. Friction and wear of plastic products Spoormaker Consultancy in Reliability](https://reader031.vdocuments.net/reader031/viewer/2022022612/5b9c477209d3f29b498c6459/html5/thumbnails/25.jpg)
Stick-slip effect
Spoormaker Consultancy in Reliability & Liability of Plastic Products
time
Dictaat Hfdst. 3 Fig. 3.14
![Page 26: Society of Plastics Engineers Europe - VeMet · Society of Plastics Engineers Europe Tribologie/polymeren. Friction and wear of plastic products Spoormaker Consultancy in Reliability](https://reader031.vdocuments.net/reader031/viewer/2022022612/5b9c477209d3f29b498c6459/html5/thumbnails/26.jpg)
deformatie
adhesieve slijtage
abrasieve slijtage
pitting
Spoormaker Consultancy in Reliability & Liability of Plastic Products
IO-2040-20081201
slijtage bij kunststoffen
![Page 27: Society of Plastics Engineers Europe - VeMet · Society of Plastics Engineers Europe Tribologie/polymeren. Friction and wear of plastic products Spoormaker Consultancy in Reliability](https://reader031.vdocuments.net/reader031/viewer/2022022612/5b9c477209d3f29b498c6459/html5/thumbnails/27.jpg)
Boundary and deformation zone
Spoormaker Consultancy in Reliability & Liability of Plastic Products
• Boundary zone
• Deformation zone
Hard roughness
asperity top
Dictaat Hfdst. 3 Fig. 3.15
![Page 28: Society of Plastics Engineers Europe - VeMet · Society of Plastics Engineers Europe Tribologie/polymeren. Friction and wear of plastic products Spoormaker Consultancy in Reliability](https://reader031.vdocuments.net/reader031/viewer/2022022612/5b9c477209d3f29b498c6459/html5/thumbnails/28.jpg)
Adhesive wear
Spoormaker Consultancy in Reliability & Liability of Plastic Products
Dictaat Hfdst. 3 Fig. 3.16
![Page 29: Society of Plastics Engineers Europe - VeMet · Society of Plastics Engineers Europe Tribologie/polymeren. Friction and wear of plastic products Spoormaker Consultancy in Reliability](https://reader031.vdocuments.net/reader031/viewer/2022022612/5b9c477209d3f29b498c6459/html5/thumbnails/29.jpg)
Abrasive wear
Spoormaker Consultancy in Reliability & Liability of Plastic Products
Dictaat Hfdst. 3 Fig. 3.17
![Page 30: Society of Plastics Engineers Europe - VeMet · Society of Plastics Engineers Europe Tribologie/polymeren. Friction and wear of plastic products Spoormaker Consultancy in Reliability](https://reader031.vdocuments.net/reader031/viewer/2022022612/5b9c477209d3f29b498c6459/html5/thumbnails/30.jpg)
Shear stress for rolling contact
Spoormaker Consultancy in Reliability & Liability of Plastic Products
Dictaat Hfdst. 3 Fig. 3.18
![Page 31: Society of Plastics Engineers Europe - VeMet · Society of Plastics Engineers Europe Tribologie/polymeren. Friction and wear of plastic products Spoormaker Consultancy in Reliability](https://reader031.vdocuments.net/reader031/viewer/2022022612/5b9c477209d3f29b498c6459/html5/thumbnails/31.jpg)
Pitching as a result of fatigue
Spoormaker Consultancy in Reliability & Liability of Plastic Products
Fatigue cracks Pitting
Dictaat Hfdst. 3 Fig. 3.19
![Page 32: Society of Plastics Engineers Europe - VeMet · Society of Plastics Engineers Europe Tribologie/polymeren. Friction and wear of plastic products Spoormaker Consultancy in Reliability](https://reader031.vdocuments.net/reader031/viewer/2022022612/5b9c477209d3f29b498c6459/html5/thumbnails/32.jpg)
Knieprothese
Spoormaker Consultancy in Reliability & Liability of Plastic Products
![Page 33: Society of Plastics Engineers Europe - VeMet · Society of Plastics Engineers Europe Tribologie/polymeren. Friction and wear of plastic products Spoormaker Consultancy in Reliability](https://reader031.vdocuments.net/reader031/viewer/2022022612/5b9c477209d3f29b498c6459/html5/thumbnails/33.jpg)
Knieprothese
Spoormaker Consultancy in Reliability & Liability of Plastic Products
![Page 34: Society of Plastics Engineers Europe - VeMet · Society of Plastics Engineers Europe Tribologie/polymeren. Friction and wear of plastic products Spoormaker Consultancy in Reliability](https://reader031.vdocuments.net/reader031/viewer/2022022612/5b9c477209d3f29b498c6459/html5/thumbnails/34.jpg)
Putvorming in UHMPE
Spoormaker Consultancy in Reliability & Liability of Plastic Products
![Page 35: Society of Plastics Engineers Europe - VeMet · Society of Plastics Engineers Europe Tribologie/polymeren. Friction and wear of plastic products Spoormaker Consultancy in Reliability](https://reader031.vdocuments.net/reader031/viewer/2022022612/5b9c477209d3f29b498c6459/html5/thumbnails/35.jpg)
slijtage – ruwheid
meten van slijtage
vlaktedruk – pv waarde
warmte-ontwikkeling
PTFE
Hardheid
Spoormaker Consultancy in Reliability & Liability of Plastic Products
IO-2040-20081201
Lagers
![Page 36: Society of Plastics Engineers Europe - VeMet · Society of Plastics Engineers Europe Tribologie/polymeren. Friction and wear of plastic products Spoormaker Consultancy in Reliability](https://reader031.vdocuments.net/reader031/viewer/2022022612/5b9c477209d3f29b498c6459/html5/thumbnails/36.jpg)
Wear as a function of roughness for POM and HDPE
Spoormaker Consultancy in Reliability & Liability of Plastic Products
Dictaat Hfdst. 3 Fig. 3.20
![Page 37: Society of Plastics Engineers Europe - VeMet · Society of Plastics Engineers Europe Tribologie/polymeren. Friction and wear of plastic products Spoormaker Consultancy in Reliability](https://reader031.vdocuments.net/reader031/viewer/2022022612/5b9c477209d3f29b498c6459/html5/thumbnails/37.jpg)
Wear as a function of roughness and pressure for PA6.6
Spoormaker Consultancy in Reliability & Liability of Plastic Products
Dictaat Hfdst. 3 Fig. 3.21
![Page 38: Society of Plastics Engineers Europe - VeMet · Society of Plastics Engineers Europe Tribologie/polymeren. Friction and wear of plastic products Spoormaker Consultancy in Reliability](https://reader031.vdocuments.net/reader031/viewer/2022022612/5b9c477209d3f29b498c6459/html5/thumbnails/38.jpg)
Wear as a function of pressure
Spoormaker Consultancy in Reliability & Liability of Plastic Products
Dictaat Hfdst. 3 Fig. 3.22
![Page 39: Society of Plastics Engineers Europe - VeMet · Society of Plastics Engineers Europe Tribologie/polymeren. Friction and wear of plastic products Spoormaker Consultancy in Reliability](https://reader031.vdocuments.net/reader031/viewer/2022022612/5b9c477209d3f29b498c6459/html5/thumbnails/39.jpg)
Different wear tests
Spoormaker Consultancy in Reliability & Liability of Plastic Products
Dictaat Hfdst. 3 Fig. 3.23
![Page 40: Society of Plastics Engineers Europe - VeMet · Society of Plastics Engineers Europe Tribologie/polymeren. Friction and wear of plastic products Spoormaker Consultancy in Reliability](https://reader031.vdocuments.net/reader031/viewer/2022022612/5b9c477209d3f29b498c6459/html5/thumbnails/40.jpg)
Pin on disk
Spoormaker Consultancy in Reliability & Liability of Plastic Products
Dictaat Hfdst. 3 Fig. 3.24
![Page 41: Society of Plastics Engineers Europe - VeMet · Society of Plastics Engineers Europe Tribologie/polymeren. Friction and wear of plastic products Spoormaker Consultancy in Reliability](https://reader031.vdocuments.net/reader031/viewer/2022022612/5b9c477209d3f29b498c6459/html5/thumbnails/41.jpg)
Calculation of average bearing pressure and wear
Spoormaker Consultancy in Reliability & Liability of Plastic Products
p 43MPa
h k p v t
FT D
p
Extra
![Page 42: Society of Plastics Engineers Europe - VeMet · Society of Plastics Engineers Europe Tribologie/polymeren. Friction and wear of plastic products Spoormaker Consultancy in Reliability](https://reader031.vdocuments.net/reader031/viewer/2022022612/5b9c477209d3f29b498c6459/html5/thumbnails/42.jpg)
Heat flux and Average Bearing Pressure
Spoormaker Consultancy in Reliability & Liability of Plastic Products
2(W/m )h f p v
- heat flux
f – friction coeficient
p – average bearing presure
v - velocity
Dictaat Hfdst. 3 tekst
![Page 43: Society of Plastics Engineers Europe - VeMet · Society of Plastics Engineers Europe Tribologie/polymeren. Friction and wear of plastic products Spoormaker Consultancy in Reliability](https://reader031.vdocuments.net/reader031/viewer/2022022612/5b9c477209d3f29b498c6459/html5/thumbnails/43.jpg)
Critical pv-values
Spoormaker Consultancy in Reliability & Liability of Plastic Products
Dictaat Hfdst. 3 Fig. 3.25
![Page 44: Society of Plastics Engineers Europe - VeMet · Society of Plastics Engineers Europe Tribologie/polymeren. Friction and wear of plastic products Spoormaker Consultancy in Reliability](https://reader031.vdocuments.net/reader031/viewer/2022022612/5b9c477209d3f29b498c6459/html5/thumbnails/44.jpg)
Prediction of wear
Spoormaker Consultancy in Reliability & Liability of Plastic Products
h k p v t
k – wear factor
p – average bearing presure
v – velocity
t - time
Dictaat Hfdst. 3 tekst
![Page 45: Society of Plastics Engineers Europe - VeMet · Society of Plastics Engineers Europe Tribologie/polymeren. Friction and wear of plastic products Spoormaker Consultancy in Reliability](https://reader031.vdocuments.net/reader031/viewer/2022022612/5b9c477209d3f29b498c6459/html5/thumbnails/45.jpg)
Coefficients of friction and wear rates
Spoormaker Consultancy in Reliability & Liability of Plastic Products
1 1h k p v t 2 2h k p v t
Extra
![Page 46: Society of Plastics Engineers Europe - VeMet · Society of Plastics Engineers Europe Tribologie/polymeren. Friction and wear of plastic products Spoormaker Consultancy in Reliability](https://reader031.vdocuments.net/reader031/viewer/2022022612/5b9c477209d3f29b498c6459/html5/thumbnails/46.jpg)
Effect of PTFE content on wear
Spoormaker Consultancy in Reliability & Liability of Plastic Products
Extra
![Page 47: Society of Plastics Engineers Europe - VeMet · Society of Plastics Engineers Europe Tribologie/polymeren. Friction and wear of plastic products Spoormaker Consultancy in Reliability](https://reader031.vdocuments.net/reader031/viewer/2022022612/5b9c477209d3f29b498c6459/html5/thumbnails/47.jpg)
PTFE & silicone to reduce friction and wear
Spoormaker Consultancy in Reliability & Liability of Plastic Products
Extra LNP Lubricomp
![Page 48: Society of Plastics Engineers Europe - VeMet · Society of Plastics Engineers Europe Tribologie/polymeren. Friction and wear of plastic products Spoormaker Consultancy in Reliability](https://reader031.vdocuments.net/reader031/viewer/2022022612/5b9c477209d3f29b498c6459/html5/thumbnails/48.jpg)
Effect of hardness on wear
Spoormaker Consultancy in Reliability & Liability of Plastic Products
Extra LNP Lubricomp
![Page 49: Society of Plastics Engineers Europe - VeMet · Society of Plastics Engineers Europe Tribologie/polymeren. Friction and wear of plastic products Spoormaker Consultancy in Reliability](https://reader031.vdocuments.net/reader031/viewer/2022022612/5b9c477209d3f29b498c6459/html5/thumbnails/49.jpg)
Effect of shaft finish on wear (micro-inches!)
Spoormaker Consultancy in Reliability & Liability of Plastic Products
Extra LNP Lubricomp
![Page 50: Society of Plastics Engineers Europe - VeMet · Society of Plastics Engineers Europe Tribologie/polymeren. Friction and wear of plastic products Spoormaker Consultancy in Reliability](https://reader031.vdocuments.net/reader031/viewer/2022022612/5b9c477209d3f29b498c6459/html5/thumbnails/50.jpg)
warmte-ontwikkeling
vermoeiing
Spoormaker Consultancy in Reliability & Liability of Plastic Products
IO-2040-20081201
Tandwielen
![Page 51: Society of Plastics Engineers Europe - VeMet · Society of Plastics Engineers Europe Tribologie/polymeren. Friction and wear of plastic products Spoormaker Consultancy in Reliability](https://reader031.vdocuments.net/reader031/viewer/2022022612/5b9c477209d3f29b498c6459/html5/thumbnails/51.jpg)
Failure analysis
Spoormaker Consultancy in Reliability & Liability of Plastic Products
Extra
![Page 52: Society of Plastics Engineers Europe - VeMet · Society of Plastics Engineers Europe Tribologie/polymeren. Friction and wear of plastic products Spoormaker Consultancy in Reliability](https://reader031.vdocuments.net/reader031/viewer/2022022612/5b9c477209d3f29b498c6459/html5/thumbnails/52.jpg)
Failure analysis
Spoormaker Consultancy in Reliability & Liability of Plastic Products
Extra
![Page 53: Society of Plastics Engineers Europe - VeMet · Society of Plastics Engineers Europe Tribologie/polymeren. Friction and wear of plastic products Spoormaker Consultancy in Reliability](https://reader031.vdocuments.net/reader031/viewer/2022022612/5b9c477209d3f29b498c6459/html5/thumbnails/53.jpg)
Guidelines for plastic bearings
Spoormaker Consultancy in Reliability & Liability of Plastic Products
• Metal bearing surfaces must be smooth (< 1 μm), hard and corrosion
resistant.
• Wear particles must be collected in grooves.
• Bearing clearance must account for high thermal expansion and absorption
of water (PA)
• The average bearing pressure should preferably be not higher than 1 N/mm2
and at most 5 N/mm2.
• The out-of-roundness of bearings should be as small as possible and film
gates are preferred.
• Bearing plastics with PTFE are preferred especially for applications without
lubrication.
• Boundary lubrication is must better than running dry.
• Grease or oil can affect plastic bearings (swelling & ESC)
Dictaat Hfdst. 3 tekst