CAD Simulation and Analysis Flashcards
6 cards from real CAD practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 CAD Simulation and Analysis flashcards as text
Which type of FEA analysis determines the natural frequencies at which a structure will resonate?
Answer: Modal analysis
Modal analysis calculates the natural frequencies and corresponding mode shapes of a structure to help engineers avoid resonance failures.
What is the difference between linear and nonlinear FEA?
Answer: Linear assumes small deformations and elastic materials; nonlinear accounts for large deformations or plasticity
Linear FEA assumes proportional load-displacement response and small strains, while nonlinear FEA handles geometric or material nonlinearities such as plasticity or large deflections.
In fatigue analysis within CAD simulation, what does the S-N curve represent?
Answer: Stress amplitude vs. number of cycles to failure
The S-N (Wöhler) curve plots stress amplitude against cycles to failure, allowing engineers to predict component life under repeated loading.
Which simulation result metric indicates how much a part deforms under load?
Answer: Resultant displacement
Resultant displacement shows the total distance each node moves from its original position, revealing how much the part bends, stretches, or compresses.
What is the role of contact conditions in FEA assemblies?
Answer: They specify how touching surfaces interact, such as bonded, frictionless, or frictional
Contact conditions tell the FEA solver how surfaces interact—whether they are permanently bonded, can slide frictionlessly, or transfer friction forces.
In CAD-integrated CFD, what does a pressure coefficient (Cp) value greater than 1.0 indicate?
Answer: A stagnation point where velocity is zero
Cp = 1.0 corresponds to the stagnation point where all kinetic energy converts to pressure; values exceeding 1 are theoretically possible only with compressibility effects.