How to do multiple variable integration

[Steven Lord]

That image, as displayed in the regular Answers view, is rather small. Here it is using the LaTeX button. [It wasn't quite clear, opening the image in a new tab, whether the subscript on G was rel or ref.]

So how many dimensions does \tau have and what do representative G_{\re*} and E' functions look like? Simple polynomials, delta functions, complex trigonometric or special functions, etc.?

[Siva nanda Reddy]

tau has only one dimension

G(rel) is the linear shear stress relaxtion modulus

E is linear tensile stress relaxtion modulus