ABSTRACT
Here, τn=nTτ and un=nTu are the normal components of the traction and displacement vectors. Since the only traction to consider is the normal traction (to the contactor surface), the transverse components of ∆u are not needed (do not result from work). Also, k(g) is a nonlinear stiffness function given in terms of the gap by, for example,
(17.32)
As in Chapter 15, when g is positive, the gap is open and k approaches kL, which should be chosen as a small number, theoretically zero. When g becomes negative, the gap is closed and k approaches kH, which should be chosen as a large number, theoretically infinity to prevent penetration of the rigid body).
