Reg No.: B.E / B.Tech. DEGREE INTERNAL ASSESSMENT EXAMINATION - I, FEB15Sixth Semester

Aeronautical Engineering

AE2351 FINITE ELEMENT METHOD(Regulation 2008) Time: Three hours

Maximum: 100 marksAnswer ALL questions.PART A (10 X 2 = 20 marks)

1. What is mean by governing equations?

2. What are the types of boundary conditions?

3. Define convergent criteria.

4. What are the properties of stiffness matrix?

5. What is meant by linear and non linear analysis?6. What is meant by elastic and non elastic analysis

7. How many Dof for rod or ,truss & beam.

8. Write the stiffness equation for beam

9. What are advantages & disadvantages of FEM?

10. What are the FEM Software.

PART B (5 X 16 = 80 Marks)

11. A]Explain the procedure of FEM with neat examples .Write the advantages ,disadvantages of Femor

b] Find the deflection of fixed beam with udl load using galerkin ,collocation,

12. A] Find out the deflection & stress of the rod. (take E=2.1e5 N/mm2 )

or

b] Find out the deflection & stress of the rod. (take E=2.1e5 N/ mm2

or

13. A] Find the deflection of beam as shown in fig.

Take EI=7 e6 N- mm2or

B] Find the deflection of beam as shown in fig.

Take EI=5 e6 N- mm214. A] find the deflection of beam as shown in fig.

Take EI=7 e6 N- mm2or

B] Find the deflection of simply supported beam with udl load and point load using ritz method.

15. A] Explain the gauss elimination with example.

or

B] Solve the following equation d2y/dx2+100x=0, 0