Aims
This course aims to:
• introduce you to the six types of simple machines and their uses
• learn how to produce and read technical drawings
• explain how to identify potential causes of failure in machines
Content
During the course we will discuss the basic concepts of mechanical engineering and how the 6 simple machines are used to create complex systems. You will look at the properties of commonly used materials in engineering and explore how to select the most appropriate material given the system’s environmental and working conditions. You will also examine common reasons that mechanical systems fail and how to reduce the likelihood of failure. In many cases failure can be predicted by calculating the stress and strain components are under when working. During the course you will learn how to calculate the probability of failure due to these factors.
Technical drawings are an essential tool in mechanical engineering and you will be shown how to draw in isometric, orthographic, first projection and third projection view, create your own technical drawings and interpret drawings of mechanical components.
Presentation of the course
Information will be presented using slide decks and video. During the course you will have the opportunity to work in small groups to discuss your ideas and solutions. There will be a small practical element to some sessions.
Course sessions
1. Simple machines
We will discuss the definition of mechanical engineering and look at the different types of ‘simple machine’, how they work and are used, and the concept of ‘mechanical advantage’. Using basic maths you will calculate how much the machines are able to amplify force thus making a task easier to perform.
2. Technical drawing
You will be introduced to some of the different views used in technical drawing: isometric, orthographic, first projection and third projection view, and will create drawings of selected components. We will also look at interpreting technical drawings to extract information about dimensions and shape.
3. Material properties and selection
You will investigate the different types of materials commonly used in mechanical design. By examining their properties, you will assess how they will perform in a variety of situations.
4. Calculations
In this session we will simplify systems into free body diagrams and look at calculating stress, Young’s Modulus, stiffness and ultimate tensile strength.
5. Causes of failure
We will examine case studies to identify the causes of mechanical failure and develop solutions to prevent similar instances occurring in future designs.
Learning outcomes
You are expected to gain from this series of classroom sessions a greater understanding of the subject and of the core issues and arguments central to the course.
The learning outcomes for this course are:
• identify the 6 types of simple machines and their uses
• to be able to create and interpret technical drawings of simple components
• understand how material properties relate to the performance and failure of machines
