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Endurance limit of a beam subjected to pure bending decreases with

  1. decrease in the surface roughness and decrease in the size of the beam
  2. increase in the surface roughness and decrease in the size of the beam
  3. increase in the surface roughness and increase in the size of the beam
  4. decrease in the surface roughness and increase in the size of the beam
in Mechanics of Materials by (21.2k points) 4 67 217
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