Introduction to Reliability Engineering - Why Do Engineering Products Fail?
3 important questions on Introduction to Reliability Engineering - Why Do Engineering Products Fail?
What are the main reasons why failures occur?
- Design inherently incapable
- Item overstressed
- Variation
- Wearout
- Time-dependent mechanisms
- Sneaks
- Errors
- Others
Design inherently incapable
Design is:
The more complex the design or difficult the problems are to be overcome, the greater its potential for errors, omissions, and oversights.
- Too weak
- Consume too much power
- Resonance at wrong frequency
- Others
The more complex the design or difficult the problems are to be overcome, the greater its potential for errors, omissions, and oversights.
Failures caused by other time-dependent mechanisms
- Battery run-down
- Creep
- Caused by simultaneous high temperature and tensile stress
Examples:
- Turbine discs
- Fine solder joints
- Progressive drift of electronic component parameter values
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