In this module, we will pay attention to the most important thing in aviation and space: safety. We will highlight why having an open safety culture is important and how the different parties involved in safety in aerospace work together.

Furthermore, we will go into detail on the different safety design philosophies that exist in aerospace and what each entail.

This is then followed by discussing stress and strain concentration and why it is important to avoid them and the failure mechanism of fatigue will be discussed.

Finally, to leave you with a feeling that you are in safe hands, the principle of damage tolerance is discussed.

At the end of this module, you will be able to:

• Explain the roles of the three responsible parties in aviation safety
• Describe the three major design philosophies
• Explain the meaning of stress and strain concentrations
• Give the definition of fatigue
• Discuss damage tolerance in terms of residual strength