| Sure do. In structural mechanics, which is more on the theoretical end of civil/structural engineering, we use a lot of multi-variable calculus, and even take it a step further and learn tensor calculus, which is the calculus of MATRICES... (Nearly died when I realized I was going to have to learn a whole other dimension of calculus, but it's not awful at all.)
Structural mechanics is the basic building block that structurals use to derive finite element analysis... And working backwards from finite element analysis, you can see that mechs and aeros use vector calc and tensor calc, too, since they're way into the applicability of the FEM. It's a really useful and incredibly versatile tool, and it works in so many settings. It's on the order of usefulness as, like, the INTEGRAL, but the theory and math and crunchy proofs and such that you need in order to understand how to get there are definitely a mental workout. Struct mech is known around UIUC's structural grad program as the "really hard course". I'm reeeeeally glad that I'm done with that class! |