Tension and compression in axially loaded members

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SUMMARY

The discussion centers on the mechanics of tension and compression in axially loaded members, specifically a thin rod subjected to an 80kN tensile force. It is established that while the rod experiences tension, the surrounding tube must provide a compressive reaction to maintain equilibrium. The interaction between the tensile force on the rod and the compressive forces in the tube is critical for understanding the system's stability, even if not explicitly stated in the problem.

PREREQUISITES
  • Understanding of axial loading and equilibrium principles
  • Familiarity with tensile and compressive forces in structural mechanics
  • Knowledge of basic mechanics of materials
  • Ability to analyze force transmission in mechanical systems
NEXT STEPS
  • Study the principles of axial loading in structural engineering
  • Learn about the mechanics of materials, focusing on tension and compression
  • Explore equilibrium conditions in mechanical systems
  • Investigate the role of reaction forces in maintaining structural stability
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This discussion is beneficial for engineering students, structural engineers, and anyone involved in the analysis of mechanical systems under axial loads.

influx
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The question tells us that a tensile force of 80kN acts upon the thin rod and hence we know there will be an equal but opposite force on the other side. However, I don't understand why there are compressive forces on the tube? We aren't told about this in the question.

Thanks
 
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influx said:
View attachment 81258View attachment 81259

The question tells us that a tensile force of 80kN acts upon the thin rod and hence we know there will be an equal but opposite force on the other side. However, I don't understand why there are compressive forces on the tube? We aren't told about this in the question.

Thanks
When you pull on the rod at point C, the tensile force is transmitted back to the plate and nut at point B. You cannot have a tension in the tube with this arrangement of parts.

Remember, the tube supplies a reaction to the rod so that it remains in equilibrium when the tensile force is applied.

You weren't told this in the question because it should be rather obvious. :wink:
 

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