This course introduces the mechanical properties of materials, focusing on their importance for the design of structures, mechanical systems and manufacturing systems. Small design exercises integrate design throughout the curriculum. The course also includes an introduction to finite element modelling of mechanical structures and manufacturing processes.
Specific topics include: Hooke's law for isotropic materials, true stress/strain and engineering stress/strain; mechanical properties of materials and testing methods, Young's modulus, tensile and compressive strength, fracture and yield strength, hardness and ductility. Operation of the universal testing machine, hardness tester and impact tester; creep testing and measurement of activation energy for creep; analysis of stress and strain in statically determinant structures; beam under simple tension, compression, torsion and pure bending; angle of twist of a circular shaft under torsion; stress distribution in a thin-walled pressure vessel; transformation of stress and strain using Mohr's circle; principal stresses and maximum sheer stresses; mechanisms of fracture and fatigue; energy methods in deformation; buckling. Other concepts developed include 3D stress-strain transformation, column buckling, beam deflection and energy methods.

Problem Sets (20%); Design (20%); Final Exam (60%)

ENGN1221