Name of the College : Noorul Islam College of Engineering
University : Anna University
Degree : B.E
Department : Aeronautical Engineering
Subject Code/Name : AE 1401 – Finite Element Materials
Year : 4th
Semester : 7th
Document Type : Question Bank
Website : niceindia.com
Download Model/Sample Question Paper :https://www.pdfquestion.in/uploads/niceindia.com/3062-ME_1401_-_FINITE_ELEMENT_ANALYSIS.pdf
Finite Element Materials Question Paper
1) What is meant by finite element analysis? :
Finite element method is a numerical method for solving problems of engineering mathematical physics. In the finite element method, instead of solving the problem for the entire body in one operation, we formulate the equations for each finite element and combine them to obtain the solution of the whole body.
Related : Noorul Islam College of Engineering AE1009 Aero Engine Maintenance & Repair B.E Question Bank : www.pdfquestion.in/3057.html
2) What is meant by finite element? :
A small unit having definite shape of geometry and nodes is called finite element.
3) State the methods of engineering analysis.
There are three methods of engineering analysis. They are :
1. Experimental methods.
2. Analytical methods.
3. Numerical methods or approximate methods.
4) Give examples for the finite element. :
1. One dimensional elements : (a) Truss element (b) Bar, Beam element
2. Two dimensional elements (a) Triangular element (b) Rectangular elements
3. Three dimensional elements (a) Tetrahedral elements. (b) Hexahedral elements.
5) What is meant by node or Joint? :
Each kind of finite element has a specific structural shape and is interconnected with the adjacent elements by nodal points or nodes. At the nodes, degrees of freedom are located. The forces will act only at nodes and not at any other place in the element.
6) What do you mean by discretization? :
Discretization is the basis of finite element method. The art of subdividing a structure into a convenient number of smaller components is known as discretization.
7) What are the types of boundary conditions? :
There are two types of boundary conditions, they are
Primary boundary condition.
Secondary boundary condition.
8) What are the three phases of finite element method. :
The three phases are 1. Preprocessing
2. Analysis
3.Postprocessing
9) What is structural and non-structural problem? :
Structural problem :
In structural problems, displacement at each nodal point is obtained. By using these displacement solutions, stress and strain in each element can be calculated.
Non Structural problem :
In non structural problem,temperatures or fluid pressure at each nodal point is obtained. By using these values, Properties such as heat flow, fluid flow, etcfor each element can be calculated.
10) What are the methods are generally associated with the finite element analysis? :
The following two methods are generally associated with the finite element analysis. They are
1. Force method.
2. Displacement or stiffness method
11) Explain force method and stiffness method? :
In force method, internal forces are considered as the unknowns of the problem. In displacement or stiffness metho, displacement of the node are considered as the of the problem. Among them two approaches,dislplacement method is desirable.
12) What is polynomial type of interpolation functions are mostly used in FEM? :
The polynomial type of interpolation functions are mostly used due to the following reasons :
1. It is easy to formulate and computerize the finite element equations.
2. It is easy to perform differentiation or integration.
3. The accuracy of the results can be improved by increasing the order of the polynomial .
13) Name the variational methods. :
1.Ritz method.
2. Rayleigh – Ritz method
14) Name the weighted residual methods. :
1.Point collocation method.
2. subdomain collocation method.
3. Least square method
4. galerkin’s method
15) What is meant by post processing? :
Analysis and evaluation of the solution results is referred to as post processing. Post processor computer programs help the user to interpret the results by displaying them in graphical form.
16) What is Rayleigh ritz method? :
Rayleigh ritz method is a integral approach method which is useful for solving complex structural problems, encountered in finite element analysis. This method is possible only if a suitable functional is available.
17) What does assemblage mean? :
The art of subdividing a structure into a convenient number of smaller components is known as discretization. These smaller components are then put together. The process of uniting the various elements together is called assemblage.
18) What is meant by DOF? :
When the force or reaction acts at nodal point, node is subjected to deformation. The deformation includes displacement, rotations, and/or strains. These are collectively known as degrees of freedom (DOF).
19) What is aspect ratio? :
Aspect ratio is defined as the ratio of the largest dimension of the element to the smallest dimension. In many cases, as the aspect ratio increases, the inaccuracy of the solution increases. The conclusion of many researches is that the aspect ratio should be close to unity as possible.
20) What is truss element? :
The truss elements are the part of a truss structure linked together by point joints, which transmit only axial force to the element.