Factors in Design and Safety

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Forging new generations of engineers
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Factors of Design and Safety
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Factors in Design

• Complexity of stress analysis
• Consequences of failure
• Environmental exposure
• Material Strength
• Potential Misuse of the Product

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Factors in Design (continued)

• Quality Control
• Size or Mass Effect
• Stress Concentration Factors
• Types of Loads
• Type of Material
• Cost

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Factor of Safety

• Used by engineers to account for uncertainty in
  applied forces, material properties, model
  assumptions, etc.
• The allowable stress in the part is determined by
  the following formula.
• An acceptable design is when the calculated
  stresses in the part are less than the allowable
  stress.
• Allowable Stress Material Strength
• Factor of Safety

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Factor of Safety