What does CAE actually simulate?
CAE covers several distinct analysis types. Structural (FEA) analysis predicts stress, deflection and failure under load. Thermal analysis predicts temperature distribution and expansion. Flow analysis — Moldflow for injection moulding, CFD for fluids — predicts how material or air moves through and around geometry. Modal and fatigue analysis predict vibration response and life under cyclic load.
Each answers a different question. The skill is choosing the right one for the failure mode you are actually worried about, rather than running everything and drowning in output.
Why run it before tooling instead of after the first sample?
Because after tooling, every fix is made in steel. Changing a rib thickness in CAD costs an afternoon. Changing it in a hardened mould cavity costs weeks of lead time and a re-validation cycle, and it usually lands directly on your launch date.
Simulation moves the discovery of a failure from the most expensive point in the programme to one of the cheapest.
How accurate is simulation really?
Accurate enough to make decisions with, as long as the inputs are honest. Material data, boundary conditions and load cases drive the result more than the solver does. A well-set-up FEA model on a metal bracket will typically predict stress within a usable margin; a badly-set-up one will confidently tell you something false.
That is the real argument for having engineers rather than software run your analysis.
CAE Services
Simulate before you build. Catch failures in software, not on the shop floor.
See how we do it