This subject equips the student with a fundamental understanding of mechanical problems. It will provide the student with the analytical and practical skills for solving problems in this field. This forms the basis for further study in their final year.
Section 1: Basic Stress and Strain; Elastic Constitutes/Material behaviour
Basic Stress and Strain; Shear and hydrostatic stress; direct shear strain; Shearing operations such as guillotine, punch press. Stress-strain relations, Hooke’s law. Mechanical Springs; Four elastic constants (Poisson’s ratio, bulk modulus, Young’s modulus and shear modulus).Tensile test; ductile and brittle materials. Safe working stress.Stress Concentrations.
Section 2: Simple and Compound Bars including Thermal Stress & Strain.
Review of statically determinate structures. Simple and Compound barsSimple and compound bars subjected to external loads. Temperature stress and strain; compound bars subjected to temperature change. Compound bars subjected to loads & temperature change.
Section 3: Shear force & Bending moments
Sign convention of shear force and bending moment; shear force and bending moment diagrams. Problems with concentrated, distributed and combined loads. Points of conflexture.
Section 4: Bending of Beams
Simple Bending Theory; Neutral axis, section modulus; 2nd moment of area; Bending stress of beams; Shear stresses due to bending; Limitations of simple bending theory.
Section 5: Torsion & Shear stress
Simple Theory of Torsion; polar second moment of area. Shear stress and shear strain in shafts. Torsional rigidity; torsion of hollow shafts. Composite shafts – parallel, series
| Module Content & Assessment | |
|---|---|
| Assessment Breakdown | % |
| Formal Examination | 70 |
| Other Assessment(s) | 30 |