Ағылшын 251-300

• 3 cm;

• 5,5 cm;

• 2,8 cm;

• 5 cm

• 4,9 cm;

Find the required diameter of the rivet from the condition of the crumple strength at the thickness of the overlapping sheets t=10 mm, =25 kN/cm², tensile force F=120 kN.

• 2,4 cm;

• 3,5 cm;  

• 4,8 cm;  

• 3 cm;

• 5,5 cm;  

Zhuravsky's theorem:

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The maximum tangential stresses on the contour of the twisted circular cross-section are equal to:

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The formula for the polar moment of inertia of solid circular cross-section:

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The formula for the polar moment of inertia of hollow (annular) cross-section:

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The formula for the polar moment of resistance of solid circular cross-section:

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The formula for the polar moment of resistance of hollow (annular) cross-section:

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Hooke’s law when torsion:

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If the allowable stress is [σ]=160kH/см²,the internal force is Ми=4800кН*см, then determine the moment of resistance of the cross-section?

• 10;

• 30;

• 40;

• 50;

• 70;