Types of Loading
Static
- Forces and couples are unchanging in magnitude and direction etc
- Need to examine relationships between strength and static loading for material selection
Dynamic
- Forces and couples are non-constant throughout time
- Fatigue failures are caused by exposure to fluctuating stresses
- Often, sudden failures occur
See Failure Theories for different theories for the failure of ductile and brittle materials.
See Lecture 7.1 for questions to ask when designing stuff