What is a finite element?

Finite Element Analysis (FEA) is a computer method for solving complex problems. It simplifies issues by breaking them into a finite number of simpler parts. Continuous structures have countless simple problems. FEA estimates their behavior by analyzing a limited set.

Breaking Down The Problem

Each element in FEA represents one of these simpler parts. In a finite element model, every element has fixed points, called nodes. These nodes show limits for different loads and conditions. This includes force, temperature, pressure, and acceleration. A finer mesh gives a better shape estimate. It also improves stress and strain calculations.

Virtually Limitless Possibilities

FEA can solve various issues. These include structural stress, heat transfer, thermal stress, and flow simulations. It can even tackle unusual cases like electromagnetic field simulations. You can model a wide range of environments.

More Elements, More Accuracy, Longer Solution Time

But, there’s a tradeoff: a finer mesh needs more computing power. Balancing mesh size can cut an analyst’s time without sacrificing accuracy. Experienced analysts focus on finer meshes in high-stress areas. This speeds up solutions that would otherwise take longer.

I often run simulations with over 10 million elements. The industry record now exceeds 1 billion elements.

Test Without Physical Prototypes

The results confirm design integrity without building the part or assembly. Analysts use their design, testing, and manufacturing skills to improve designs before tests.

Norman T.  Neher, P.E.
Analytical Engineering Services, Inc.
Elko New Market, MN
www.aesmn.org