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Chapter 8 – Combined Loading

Chapter 8 – Combined Loading. CL = 2 or more stresses at a given point. 8.1 Thin-Walled (r/t > 10) Pressure Vessels:. Circumferential or Hoop Stress:. s 1 uniform throughout wall!. Assumption: Thin walled so assume stress uniform throughout the wall!. Normal stress in the hoop direction.

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Chapter 8 – Combined Loading

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  1. Chapter 8 – Combined Loading CL = 2 or more stresses at a given point.

  2. 8.1 Thin-Walled (r/t > 10) Pressure Vessels: Circumferential or Hoop Stress: s1 uniform throughout wall! Assumption: Thin walled so assume stress uniform throughout the wall! Normal stress in the hoop direction

  3. Longitudinal Stress: Assumption: Thin walled so assume stress uniform throughout the wall! Normal stress in the longitudinal direction Note, this stress = hoop stress/2

  4. Summary: Cylindrical Pressure Vessels: Circumferential or Hoop Stress Longitudinal Stress

  5. What about Spherical Pressure Vessels?

  6. Examples:

  7. Examples:

  8. Elastomer volume = 13.8 in3 (was 16.2 in3) Wall thickness = .10” RJM 6/2/04

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