Example 1 (Trusses)
Course Lecturer: Eng. J Mwanangombe
Mechanics of Materials 3211
Introduction to the Analysis of Planar Trusses
(Stiffness Method)
For the truss shown, L1 = L2 = L3 = 2.1 m,
E1 = E2 = E3 = 70 GPa ,
A1 = A2 = 600 mm2 and A3 = 900 mm2.
Determine
(a) Horizontal and vertical displacements if the truss is subjected to a
horizontal force of P = 60 kN at joint A
(b) The axial forces in the members
Introduction to the Analysis of Planar Trusses
(Stiffness Method)
Introduction to the Analysis of Planar Trusses
(Stiffness Method)
Introduction to the Analysis of Planar Trusses
(Stiffness Method)
Introduction to the Analysis of Planar Trusses
(Stiffness Method)
Introduction to the Analysis of Planar Trusses
(Stiffness Method)
Introduction to the Analysis of Planar Trusses
(Stiffness Method)
Introduction to the Analysis of Planar Trusses
(Stiffness Method)
Example 2
Elastic Plastic Material Behaviour
Course Lecturer: Eng. J Mwanangombe
Mechanics of Materials 3211
Elastic Plastic Material Behaviour
Elastic Plastic Material Behaviour
Elastic Plastic Material Behaviour
Elastic Plastic Material Behaviour
Elastic Plastic Material Behaviour
Elastic Plastic Material Behaviour
Elastic Plastic Material Behaviour
Elastic Plastic Material Behaviour
Elastic Plastic Material Behaviour
Elastic Plastic Material Behaviour
Note: The assumption here is that after member 1 has yielded,
member 1 approaches its ultimate/plastic load when member 2 has
yielded.