Question

The assembly shown in the figure below consists of solid AB, BC and CD rods connected together, the solid rod AB has 10 mm diameter and 100 mm length, the solid rod BC has 20 mm diameter a 120 mm length, while the solid rod CD has 10 mm diameter and 100 mm length. Allh rods are made of steel with E-200 GPa. the assembly is subjected to 100 kN tensile force (CLO5) The average normal stress between A and B is equal to: 20 mm 10 mm 10 mm O0kN 100kN 100 mm 120 mm 100 mm 1273.2 MPa 141.5 MPa 79.6 MPa 18.3 MPa

Answer 1

Average normal stress in AB is;

$\sigma _{AB} = \frac{P}{A_{AB}} = \frac{100(10^3)}{(\pi/4)(10^2)}$

$\Rightarrow \sigma _{AB}=1273.2\;\;MPa\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;...(Answer|Option-A)$