DE4302 – Mechanics

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Module code
DE4302
Module title
Mechanics
Prescription
To develop a sound understanding of the principles of mechanics
Programmes
  • EN1603
  • SC1101
NZQA Level
Level 4
NZQA Credits
15
Delivery method
  • Web-Enhanced
Learning hours
Directed hours
90
Self directed hours
60
Total learning hours
150
Resources required
Learning Outcomes
On successful completion of this course, the student should be able to:
1.Demonstrate the correct use of analysing forces and moments in mechanical systems.
2.Calculate indirect stresses (bending and torsion) in mechanical components and select appropriate sections from standard tables.
3.Demonstrate an understanding of energy in mechanical system, including the Conservation of energy theory.
4.Demonstrate an understanding of the forces, moments and torques resulting from linear acceleration, rotational acceleration, and centripetal acceleration.
Content
FBD for beams with point and UD loads
Shear Force and Bending Moment diagrams. Points of contra flexure
Equivalent single force to multiple forces
Equivalent force and moment
FDB for non-concurrent force systems.
Pin-jointed frameworks by graphical and analytical techniques. Bow's notation.
Second moments of area, parallel axis theorem, section modulus.
Bending stresses. Selection of sections from Steel Property Tables.
Combined bending and direct normal stress applications
Torsional shear stresses and angular displacements in solid and hollow shafts. Polar second moments of area.
Work and Power, Efficiency
Conservation of energy; Potential, Kinetic and strain energy, Linear and rotational.
Inertia forces, Dynamic FBD (blocks on slope with friction and acceleration)
Centripetal and centrifugal forces and applications, bodies cornering.
Moments of inertia, radius of gyration and applications e.g. flywheels.
Assessment Criteria
Assignments, Tests 20
Laboratory (Practical) 30
Examination 50