Computer-Aided Design (CAD) & Simulation Flashcards
7 cards from real DMD practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Computer-Aided Design (CAD) & Simulation flashcards as text
Which tolerance analysis method guarantees assembly by assuming all individual part tolerances simultaneously reach their extreme limits?
Answer: Worst-Case Tolerance Analysis
Worst-case tolerance analysis ensures assemblability under all possible combinations by assuming every part is at its tolerance extreme simultaneously.
In CAD-based motion simulation, what is a 'degree of freedom' (DOF)?
Answer: An independent way a rigid body can move or rotate in space
Degrees of freedom describe the possible movements (translation or rotation) a body can make; a rigid body in 3D space has up to 6 DOF.
What is the primary advantage of using a digital twin during product development and operation?
Answer: Enables real-time monitoring and simulation of a product's physical behavior
A digital twin mirrors a physical asset to simulate, predict, and optimize performance using real-time data from sensors on the physical counterpart.
In simulation mesh generation, what does increasing 'mesh density' directly affect?
Answer: Both solution accuracy and computational time required
A finer mesh improves solution accuracy in critical regions but also significantly increases the computational resources and time needed to solve the analysis.
Which CAD feature allows multiple design variants (e.g., different sizes or options) to coexist within a single CAD file?
Answer: Design configurations
Configurations allow multiple design variants with different dimensions, suppressed features, or material assignments within one CAD file.
What is the purpose of a 'tolerance stack-up analysis' in assembly design?
Answer: Determining whether accumulated dimensional variations will allow proper assembly function
Tolerance stack-up analysis evaluates how individual part tolerances combine to affect critical assembly dimensions and whether the assembly will function properly.
In structural simulation, which boundary condition type defines how a model is physically supported or attached to its surroundings?
Answer: Constraints and fixtures
Constraints/fixtures define where and how the model is held in place, preventing rigid body motion and simulating real-world attachment conditions.