पतली दीवार वाली दबाव वाहिकाओं में, अनुदैर्ध्य प्रतिबल _______ हूप प्रतिबल है।

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JKSSB JE Mechanical 02 Nov 2021 Shift 1 Official Paper
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  1. चार गुना
  2. आधा
  3. के बराबर
  4. दो गुना

Answer (Detailed Solution Below)

Option 2 : आधा
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संकल्पना:

हूप प्रतिबल:

 

\({\sigma _1} ={\sigma _h} = \frac{{pd}}{{2t}} =\sigma \)

अनुदैर्ध्य प्रतिबल:

\({\sigma _2} ={\sigma _L} = \frac{{pd}}{{4t}} =\frac{\sigma}{2} \)

इसलिए, पतली दीवार वाले बेलनाकार दबाव बर्तन में, हूप प्रतिबल अनुदैर्ध्य प्रतिबल से दोगुना है।

Additional Information

चूँकि कि यह एक पतले बेलन की स्थिति है:

\({\sigma _r} =0\)

अधिकतम अपरूपण प्रतिबल,

\(\tau _{max} = max\ [\frac{{\sigma _{max}}\;-\;{\sigma _{min}}}{{2}}=\frac{{\sigma _1}\;-\;0 }{2} =\frac{{pd}}{{4t}} \)

\(\tau _{max} = max\ [| \frac{{\sigma _{1}}\;-\;{\sigma _{2}}}{{2}}|, | \frac{{\sigma _{2}}\;-\;{\sigma _{3}}}{{2}}|,| \frac{{\sigma _{3}}\;-\;{\sigma _{1}}}{{2}}|]\)

\(\Rightarrow\tau_{max} = max\ [\frac{\sigma }{4}, \ \frac{\sigma }{4}, \ \frac{\sigma }{2}] \)

.\(\Rightarrow \tau_{max} = \frac{\sigma}{2}\)

\(\Rightarrow {\tau _{max}}= \frac{{pd}}{{4t}} \)

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