[2.63] A standard tension test is used to determine the properties of an experimental plastic. The test specimen is a 16 mm diameter rod and it is subjected to a 3.2 kN tensile force. Knowing that an elongation of 11l mm and a decrease of diameter of 0.625 mm are observed in a 125 mm gage length, determine the modulus of elasticity, the modulus of rigidity, and Possion's ratio of the material. P 16 -mm diameter 125 mm P'

A standard tension test is used to determine the properties of anexperimental plastic. The test specimen is a 15 mm diameter rod and it issubjected to a 3.2 kN tensile force. Knowing that an elongation of 11 mmand a decrease of diameter of 0.625 mm are observed in a 120 mm gagelength, determine the modulus of elasticity, the modulus of rigidity, andPossion’s ratio of the material.

Callister Problem 6.20: A brass alloy is known to have a yield strength of 275 MPa, a tensile strength of 380 MPa, and an elastic modulus of 103 GPa. A cylindrical specimen of this alloy 12.7 mm in diameter and 250 mm long is stressed in tension and found to elongate 7.6 mm. On the basis of the information given, is it possible to compute the magnitude of the load that is necessary to produce this change in length? If so, calculate the load. If not, explain why.

Problem 1.1. A rod 150 cm long and of diameter 2.0 cm is subjected to an axial pull of 20 kN. If the modulus of elasticity of the material of the rod is 2 x 105 N/mm2 ; determine : (i) the stress, (ii) the strain, and: (iii) the elongation of the rod: