CAD CAD Simulation and Analysis 2

Question 1

What is the safety factor in FEA results, and how is it calculated?

Accepted Answer

Ratio of material yield strength to calculated stress

Answer

Safety factor equals the material's yield strength divided by the peak calculated stress, indicating how much additional load the part can safely handle.

Question 2

In thermal simulation, what property describes a material's ability to conduct heat?

Accepted Answer

Thermal conductivity

Answer

Thermal conductivity (k) quantifies how readily a material transfers heat through conduction, measured in W/(m·K).

Question 3

What does mesh convergence testing verify in FEA?

Accepted Answer

That results stabilize as element size decreases

Answer

Mesh convergence testing confirms that refining the mesh no longer significantly changes the results, ensuring numerical accuracy.

Question 4

Which FEA element type is most commonly used for thin-walled sheet metal parts?

Accepted Answer

Shell elements

Answer

Shell elements efficiently model thin structures by representing thickness as a parameter rather than meshing through the wall, saving computation time.

Question 5

In motion simulation, what term describes the joint that allows rotation about one axis only, like a door hinge?

Accepted Answer

Revolute joint

Answer

A revolute (or hinge) joint constrains all translations and two rotational degrees of freedom, permitting only single-axis rotation.

CAD - Computer-Aided Design Practice Test

CAD - Computer-Aided Design Practice Test

CAD CAD Simulation and Analysis 2