Suppose that at point P in a fluid the Cartesian stress tensor is

(a) Evaluate the stress vector s at point P for a test surface that is perpendicular to the x axis. Find the stress exerted by the fluid on the +x side.

(b) Repeat part (a) for a test surface perpendicular to the y axis, finding the stress exerted by the fluid on the +y side.

(c) With this stress tensor there is a particular surface orientation for which s = 0. Find the unit normal n for the stress-free surface.

Transcribed Image Text:

4 6 --(:) = 6 0 3 9 . (P6.2-1)