ME 255 — Strength of Materials I

BSc BSc Mechanical Engineering · Kwame Nkrumah University of Science and Technology

Objectives At the end of this course, students should be able to: Understand the concept of rotational, translational and general motions. Perform 2D kinematic analysis of a rigid body with a moving frame. Determine centre of mass, and moment and product of inertia of a rigid body about an axis. Perform 2D kinetic analysis of a rigid body. Statically and dynamically balance rotating masses. Identify and distinguish between independent motions of a rigid body moving in 2D. Outline the significance of performing 2D kinematic analysis of a rigid body with a moving frame. Outline the significance of determining the centre of mass, moment and product of inertia of a rigid body about an axis. Outline the significance of Performing 2D kinetic analysis of a rigid body. Outline the significance of performing static and dynamic analysis of a planar linkage. Outline the significance of statically and dynamically balancing rotating masses. Content Kinematics of a Particle: Continuous and Erratic Rectilinear Motions, Rotational Motions, Curvilinear Motions including Projectiles, Dependent and Relative Motion Analysis of Two Particles. Kinetics of a Particle: Equation of Motion for a System of Particles. Work and Energy: Work, Energy, Power, Efficiency, principle of Conservation of Energy. Impulse and Momentum: Principle of Linear impulse and momentum, Conservation of linear momentum for system of particles, Impact, Angular momentum, moment of a force and angular moment momentum, principle of angular impulse and momentum. Centre of Gravity and mass moment of inertia: centre of gravity from first principle and composite bodies, mass moment of inertia, radius of gyration, parallel axis theorem, and moment of inertia of composite bodies. Kinetics of a Rigid Body: Planar Kinetic Equations of Motion including Translation, rotation about a fixed axis and general planar motion. Work and Energy for a rigid body: Kinetic energy, work a force and a couple, principle of conservation of energy for rigid bodies. Impulse and Momentum for a rigid body: Linear and angular momentum, principle of impulse and momentum, conservation of momentum, eccentric impact. Rotary balancing: single and multi-planes using graphical and analytical methods. Mode of Delivery The mode of delivery of this course will be blended i.e., in person and online Reading Materials The following STUDY MATERIALS WILL assist the student in this course: Dynamics of Machinery: Theory and Applications | Hans Dresig | Franz Holzweißig (2010) Kinematics, Dynamics, and Design of Machinery | Kenneth J. Waldron | Gary L. Kinzel | Sunil K. Agrawal (2016) Dynamics of Rotating Machines | M. I. Friswell (2010) Theory of Machines: Kinematics and Dynamics | B. V. R. Gupta (2010) Theory of Machines | Rattan (2010)

Credits

3

Level

Year Two

Semester

Semester One

Course details from DETAILED COURSE OUTLINE FOR BSC MECHANICAL ENGINEERING - Department of Mechanical Engineering.