MACHINE DESIGN CROSSWORD

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Across
  1. 4. Symbol used for endurance limit
  2. 5. Unit of stress, same as N/mm²
  3. 7. Type of fatigue failure characterized by microscopic crack initiation
  4. 8. Joint with tapered wedge for fastening
  5. 9. Failure that occurs due to sudden energy absorption
  6. 11. Joint used for axial tensile load in rods
  7. 12. Angle of twist per unit length is inversely proportional to this property
  8. 13. Line parallel to Goodman used for ductile materials (Sy used)
  9. 15. Moment that produces bending
  10. 16. Key type used for permanent joint, tapered
  11. 18. Property indicating material’s insensitivity to notch
  12. 20. Test machine used to obtain S–N curve data
Down
  1. 1. Shaft supported on bearings carrying pulleys
  2. 2. Stress varying between two unequal values (≠ ±)
  3. 3. Equation relating alternating stress, mean stress & ultimate strength (parabolic)
  4. 6. AXLE that transmits no torque, just supports load
  5. 10. Stress concentration reducing feature
  6. 14. A steel rod transmits an axial tensile load of 25 kN. Permissible tensile stress = 100 N/mm². Find required diameter (use circular cross-section).
  7. 17. allowing axial movement
  8. 19. Factor used to correct endurance limit for surface finish