Pressure reqd. to rupture a tube

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SUMMARY

The discussion establishes that the pressure required to rupture a tube is significantly influenced by the direction of the pressure and the material properties. It concludes that external pressure, such as that from packed soil, can be effectively resisted by concrete sewer pipes, which are strong in compression but weak in tension. In contrast, internal pressure from a sewer backup can lead to failure at less than 20% of the external pressure due to the tensile stress it induces. Steel pipes, however, exhibit similar strength in both compression and tension, making them more resilient under varying pressure conditions.

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  • Understanding of material properties, specifically tensile and compressive strength.
  • Knowledge of pressure dynamics in fluid systems.
  • Familiarity with concrete and steel pipe construction and their applications.
  • Basic principles of structural engineering related to pipe design.
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  • Research the tensile and compressive strength of various materials used in pipe construction.
  • Learn about the effects of soil pressure on buried pipes and how to calculate it.
  • Explore the differences in failure modes between concrete and steel pipes under internal and external pressures.
  • Investigate design standards for sewer systems, focusing on pressure management and material selection.
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Engineers, construction professionals, and students studying civil engineering or materials science, particularly those involved in the design and analysis of piping systems.

m.a.tarafdar
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Which pressure or force is higher to rupture a tube,to rupture it from inside or outside ?I think from outside will be higher due to greater surface area .
 
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It would depend on the material.

A concrete sewer pipe (with out steel reinforcement) is quite strong in compression, but much weaker in tension. A uniform pressure from outside, like packed soil, could be resisted very well, because it is compressing the structure of the pipe, but for pressure inside the pipe (from a sewer backup) the failure might occur at less than 20% of the external pressure (neglecting in this case, the external pressure on the pipe from the soil tending to hold it together) because the internal pressure will tend to expand the pipe, failing the material in tension.

Steel, on the other hand, generally is similarly strong in compression and tension.
 

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