इस्पात का बेलनाकार नमूना जिसका 11 mm का वास्तविक व्यास है, उसे विभंजन के लिए तनन परीक्षित किया गया है तथा उसमें 400 MPa का इंजीनियरी विभंजन सामर्थ्य पाया गया है। यदि विभंजन की अनुप्रस्थीय काट 10 mm है, तो विभंजन का यथार्थ प्रतिबल ________ है।

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ISRO VSSC Technical Assistant Mechanical 14 July 2021 Official Paper
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  1. 440 MPa
  2. 484 Mpa
  3. 400 MPa
  4. उपर्युक्त में से कोई नहीं

Answer (Detailed Solution Below)

Option 2 : 484 Mpa
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Detailed Solution

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अवधारणा:

विभंजन पर वास्तविक प्रतिबल,

वास्तविक प्रतिबल = इंजीनियरिंग प्रतिबल × (1+ वास्तविक प्रतिबल) अर्थात्

𝜎𝑡 = 𝜎0 (1 + 𝑒)

या, 

गणना:

दिया गया है di = 11 mm, df = 10 mm, σf = 400 MPa

अब,

∴ 𝜎t = 484 MPa.

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