Table 5 The plan of experiment based on rotatable central composite design.

From: Wear behaviour and statistical assessment of organomodified nanoclay reinforced glass fiber epoxy nanocomposites

Independent variables

Symbol

Levels of coded variables

-α

Low

Medium

High

+α

-1.682

-1

0

+ 1

+ 1.682

Applied load (AL), N

A1

8.18

15

25

35

41.81

Sliding velocity (SV), m/s

B2

0.25

0.7

1.35

2

2.44

Sliding distance (SD), m

C3

318.30

695

1247.5

1800

2176.69

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