How do you use modeling tools for mechanical testing?

1 Choose a modeling tool

The first step in modeling a mechanical system or component is to choose a tool that meets your needs and objectives. There are many options, such as finite element analysis (FEA) tools, which divide the model into small elements and solve equations of motion, stress, strain, and heat transfer for each element. FEA tools are useful for analyzing structural behavior and deformation under loading conditions. Computational fluid dynamics (CFD) tools model the flow of fluids and gases around or inside the model and are useful for analyzing aerodynamic, thermal, or acoustic performance. Multibody dynamics (MBD) tools model motion and forces of rigid or flexible bodies connected by joints, springs, dampers, or other elements. MBD tools are beneficial for analyzing kinematic and dynamic behavior in complex mechanical systems such as robots, vehicles, or machines.

2 Create or import your model

The next step is to create or import your model into the modeling tool. You can either design your model from scratch using the built-in features and functions of the tool, or import an existing model from another software or source. Depending on the tool and the format of your model, you may need to perform some preprocessing steps, such as meshing, scaling, or simplifying your model to make it suitable for the analysis.

3 Define the testing parameters

The third step is to define the testing parameters for your model. These include the type and magnitude of the forces, loads, or conditions that you want to apply to your model, such as pressure, temperature, displacement, velocity, or torque. You also need to define the boundary conditions, which specify how your model is constrained or supported during the analysis. For example, you may fix some nodes or edges of your model to prevent them from moving, or apply a symmetry condition to reduce the size of your model. Additionally, you need to define the material properties of your model, such as density, elasticity, or conductivity.

4 Run the simulation

The fourth step is to run the simulation and let the modeling tool solve the equations and calculate the results. Depending on the tool and the complexity of your model and testing parameters, this may take from a few seconds to several hours or days. You may need to adjust some settings or parameters to improve the accuracy, stability, or speed of the simulation. For example, you may change the solver type, the mesh size, or the time step.

5 Analyze the results

The final step is to analyze the results of the simulation and evaluate the performance and behavior of your model. The modeling tool will provide you with various output data and visualizations, such as graphs, charts, tables, or animations. You can use these to examine the response of your model to the testing parameters, such as the displacement, stress, strain, temperature, pressure, or velocity of your model. You can also compare the results with the expected or desired outcomes, or with the results of other models or experiments. Based on the analysis, you can identify the strengths, weaknesses, or limitations of your model, and make any necessary changes or improvements to your design.

6 Here’s what else to consider

This is a space to share examples, stories, or insights that don’t fit into any of the previous sections. What else would you like to add?