A plastic material, such as clay, also possess some degree of rigidity. However, the critical shear stress at which it yields is relatively small, and once this stress is exceeded the material deforms continuously and irreversibly, and does not recover its original shape when the stress is relieved.By definition, a fluid material possesses no rigidity at all.In other words, a small fluid element is unable to withstand any tendency of an applied shear stress to change its shape. Incidentally, this does not preclude the possibility that such an element may offer resistance to shear stress. Fluids are isotropic media: i.e. , there is no preferred direction in a fluid. 2  Fluids are Newtonian: i.e. , there is a linear relationship between the local shear stress and the local rate of strain, as first postulated by Newton.
Katherine Kelly Lang. Katherine Kelly Lang originated the role of âBrooke Logan,â the showâs quintessential heroine, at THE BOLD AND BEAUTIFULâs inception on March 23, 1987. Lang is one of three children in a show business family.
Measurements: 36C-22-34. Brooke Burke is a sensationally beautiful American television personality and model, known for her work on television programs including Dancing with the Stars, Rock Star and Wild On! Email This BlogThis! Share to Twitter Share to Facebook.