Question

The stress vector is correspondingly defined as ___________

(a) σ=[σy,σz,τyz,σθ]^T

(b) σ=[σy,σz]^T

(c) u=[u, w]^T

(d) T=[Ty,Tz]^T

I had been asked this question during an online exam.

I'd like to ask this question from Axis Symmetric Formulation topic in section Axis Symmetric Solids Subjected to Axis Symmetric Loading of Finite Element Method

Answer 1

Right option is (a) σ=[σy,σz,τyz,σθ]^T

The best I can explain: The stress is expressed by the Cauchy traction vector T defined as the traction force F between adjacent parts of the material across an imaginary separating surface S, divided by the area of S.