Important RGPV Question

ME-603 (B), Computer Aided Engineering

VI Sem, ME

Unit 1: Introduction to Computer Engineering

Q.1 Explain the differences between analytical, numerical, and experimental methods for solving engineering problems, highlighting their merits and limitations.
Q.2 Describe the role of discretization in Computer Aided Engineering (CAE) and discuss how element size and shape affect solution accuracy.
Q.3 What is the significance of meshing in Finite Element Analysis (FEA)? Discuss its impact on computational accuracy and efficiency.
Q.4 Differentiate between chain-bumping-stages and concurrent-collaborative design cycles in the context of CAE.
Q.5 How does the computer enable concurrent design in engineering? Provide examples of its application in mechanical systems.
Q.6 Define degrees of freedom (DOF) in the context of mechanical systems and explain their relevance in FEA.
Q.7 Derive the stiffness constant ( K ) for tensile loading in a mechanical system and explain its significance in FEA.
Q.8 Discuss the practical applications of FEA in new design development, optimization, and failure analysis.
Q.9 Explain how boundary conditions influence the results of FEA simulations. Provide an example.
Q.10 Describe the role of mass, damper, and spring in modeling mechanical systems for FEA.

Unit 2: Types of Analysis

Q.1 List and explain the different types of analysis performed in CAE (e.g., static, dynamic, thermal, etc.).
Q.2 Differentiate between linear and non-linear static analysis in CAE with suitable examples.
Q.3 Explain the concept of normal, shear, and torsion stresses and their representation in FEA.
Q.4 Describe the process of meshing for 1D, 2D, and 3D elements, including the significance of element length.
Q.5 Derive the force, stiffness, and displacement matrix for a single rod element using the Finite Element Method.
Q.6 Solve a two-rod assembly problem using the Finite Element Method and compare the results with an analytical solution.
Q.7 Explain the Rayleigh-Ritz method in FEM and its application in solving engineering problems.
Q.8 Discuss the Galerkin method in FEM and its advantages over other methods for solving differential equations.
Q.9 What are tri-axial stresses, and how are they analyzed in CAE simulations?
Q.10 Explain the significance of moment of inertia in the context of structural analysis in CAE.

Unit 3: 2D-Meshing

Q.1 What is 2D meshing, and why is it critical for analyzing sheet work and thin shells in CAE?
Q.2 Discuss the effect of mesh density on the accuracy of FEA results in 2D meshing.
Q.3 Explain the concept of mesh biasing in critical regions and its impact on simulation results.
Q.4 Compare the advantages and disadvantages of triangular (tria) and quadrilateral (quad) elements in 2D meshing.
Q.5 What are the key quality checks performed in 2D meshing? Explain the role of the Jacobian in these checks.
Q.6 Describe the significance of distortion and stretch in evaluating the quality of 2D meshes.
Q.7 What is meant by “free edge” in 2D meshing, and how does it affect simulation accuracy?
Q.8 Explain the concept of duplicate nodes in 2D meshing and how to identify and resolve them.
Q.9 Discuss the importance of shell normal in 2D meshing and its impact on FEA results.
Q.10 Provide a step-by-step procedure for performing quality checks on a 2D mesh before running an FEA simulation.

Unit 4: 3D-Meshing

Q.1 Explain the process of 3D meshing and its significance in CAE simulations with only 3 degrees of freedom.
Q.2 Describe the algorithm for converting triangular (tria) elements to tetrahedral (tetra) elements in 3D meshing.
Q.3 Differentiate between floating and fixed trias in 3D meshing and their applications.
Q.4 List the quality checks performed for tetrahedral meshing and explain their importance.
Q.5 Discuss the process of brick meshing and the quality checks associated with it in 3D FEA.
Q.6 Explain the role of special elements like weld, bolt, and bearing in 3D meshing simulations.
Q.7 Describe the shrink fit simulation technique in CAE and its practical applications.
Q.8 How are CAE simulation results correlated with test data? Explain the process of validation.
Q.9 Discuss the post-processing techniques used in 3D FEA simulations to interpret results.
Q.10 Explain the challenges in meshing complex 3D geometries and how they can be addressed.

Unit 5: Optimization

Q.1 What is linear optimization, and how is it applied in the context of CAE?
Q.2 Differentiate between process optimization and product optimization in engineering design.
Q.3 Explain the concept of Design for Manufacturing (DFM) and its role in product development.
Q.4 Discuss the use of morphing techniques in FEA for optimizing designs.
Q.5 What is the difference between classical design for infinite life and design for warranty life?
Q.6 Explain the role of warranty yard meetings in product development and their functional significance.
Q.7 How do climatic conditions affect the design process in CAE? Provide examples.
Q.8 Discuss the concept of design abuses and their consideration in CAE simulations.
Q.9 Analyze a case study where FEA was used to optimize a mechanical component for cost-cutting.
Q.10 Explain how CAE can be used to balance performance and durability in product design.

— Best of Luck for Exam —