The principal strain rates will be in the proportions of

Question

A metal piece under the stress state of three principal stresses 30, 10  and  5 kg/mm² is undergoing plastic deformation. The principal strain rates will be in the proportions of                            

(a) 15, -5 and – 10             

(b) -15, 5 and -10

(c) 15, 5 and 10         

(d) 16 MPa