Open Access
Table 3
Values of bulk and contact stiffness for a local contact load of 
= 75N. Note that kR is large because it is the equivalent roller (8 rollers in parallel).
| Bulk stiffness | Contact stiffness |
|---|---|
| kN = 7.74 × 1010 N m−1 | kNR = 2.95 × 106 N m−1 at  = 75 N |
| kS = 5.34 × 1010 N m−1 | kSR = 2.65 × 106 N m−1 at  = 75 N |
| kR = 9.50 × 1010 N m−1 |
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