Table of friction coefficients: Difference between revisions

Latest revision as of 20:49, 29 May 2010

First surface	Second surface	Condition	$\mu _{s}$	$\mu _{k}$	$\tan ^{-1}(\mu _{s})$ (radians)	$\tan ^{-1}(\mu _{s})$ (degrees)	$\tan ^{-1}(\mu _{k})$ (radians)	$\tan ^{-1}(\mu _{k})$ (degrees)
Aluminimum	Mild steel	Dry and clean	$0.61$	$0.47$	$0.55$	$31$	$0.44$	$25$
Aluminimum	Aluminimum	Dry and clean	$1.05-1.35$	$1.4$	$0.81-0.93$	$46-53$	$0.95$	$54$
Copper	Steel	Dry and clean	$0.53$	$0.36$	$0.49$	$28$	$0.35$	$20$
Copper	Copper	Dry and clean	$1.0$	?	$0.79$	$45$	?	?
Wood	Concrete	Dry and clean	$0.62$	?	$0.55$	$32$	?	?
Wood	Metal	Dry and clean	$0.2-0.6$	?	$0.2-0.54$	$11.3-31$	?	?
Wood	Metal	Wet	$0.2$	?	$0.2$	$11.3$
Wood	Wood	Dry and clean	$0.25-0.5$	?	$0.24-0.46$	$14-26$	?	?
Wood	Wood	Wet	$0.2$	?	$0.2$	$11$	?	?
Mild steel	Mild steel	Dry and clean	$0.74$	$0.57$	$0.64$	$37$	$0.52$	$30$
Hard steel	Hard steel	Dry and clean	$0.78$	$0.42$	$0.66$	$38$	$0.40$	$23$

@@ Line 11: / Line 11: @@
 |-
 | Copper || Copper || Dry and clean|| <math>1.0</math> || ? || <math>0.79</math> || <math>45</math> || ? || ?
+|-
+| Wood || Concrete || Dry and clean || <math>0.62</math> || ? || <math>0.55</math> || <math>32</math> || ? || ?
+|-
+| Wood || Metal || Dry and clean || <math>0.2 - 0.6</math> || ? || <math>0.2 - 0.54</math> || <math>11.3 - 31</math> || ? || ?
+|-
+| Wood || Metal || Wet || <math>0.2</math> || ? || <math>0.2</math> || <math>11.3</math>
 |-
 | Wood || Wood || Dry and clean || <math>0.25 - 0.5</math> || ? || <math>0.24 - 0.46</math> || <math>14 - 26</math> || ? || ?
@@ Line 18: / Line 24: @@
 | Mild steel || Mild steel || Dry and clean || <math>0.74</math> || <math>0.57</math> || <math>0.64</math> || <math>37</math> || <math>0.52</math> || <math>30</math>
 |-
-| Hard steel || Hard steel || Dry and clean || <math>0.78</math> || <math>0.42</math> || <math>0.66</math> || <math>38</math> || <math>0.40</math> || 23</math>
+| Hard steel || Hard steel || Dry and clean || <math>0.78</math> || <math>0.42</math> || <math>0.66</math> || <math>38</math> || <math>0.40</math> || <math>23</math>
 |}
 For more, see [http://www.engineershandbook.com/Tables/frictioncoefficients.htm The Engineer's Handbook] and [http://www.engineeringtoolbox.com/friction-coefficients-d_778.html Engineering Toolbox].
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