Fourth year, Department of Mechanical Sandwich
Engineering
First and second Units Questions.
Answer ALL questions
PART A – (10×2=20 marks)
1. What is meant by
finite element analysis?
2.What is meant by
node or joint
3.Explain the force
method and stiffness method?
4. What are the type
loading acting on the structure?
5. State the
properties of a stiffness matrix?
6. Write general
finite element equation.
7. Write down the
expression of stiffness matrix for a truss element ?
8. Define plane
stress analysis?
9. Write a
displacement function equation for CST element.
10. Write a strain
displacement matrix for CST element.
PART B – (5x16=80 marks)
11.
Consider a taper steel plate of uniform thickness t=25mm as show in fif. The
young’s modulus of the plates, E=2*105N/mm2 and weight
density, ρ=0.82*10-4. In addition to its self weight the plate is
subjected to a point load p=100N at its mid point. Calculate the following by
modeling the plate with two finite element;
(i) Global force vector{F} (ii)
Global stiffness matrix
(iii)Displacement in each element (iv) Stresses in
each element
(v)
Reaction force at the support.
150mm
300mm
600mm pP
PP
75mm
12.
Enumerate the various casting defect and suggest sutable remedies.
13.
(a) What are the pattern allowances? Explain briefly each
(b) Discuss the properties of moulding
sand.
14.
Explain the manual arc welding process with a neat sketch .
15.
(a) Explain Spot welding with neat sketch.
(b) Explain butt welding with neat
sketch.
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