Question

For a bronze alloy, the stress at which plastic deformation begins is 275MPa275 \mathrm{MPa}275MPa (40,000 psi), and the modulus of elasticity is 115GPa115 \mathrm{GPa}115GPa (16.7 \times 10^6 \mathrm{psi}).

Answer 1

The stress at which plastic deformation begins is called the elastic limit. Beyond this point, the material deforms irreversibly and does not return to its original shape and size, even when the load is removed. The breaking stress represents the stress at which the material fractures.

Step-by-step explanation:

The stress at which plastic deformation begins is called the elastic limit. Beyond this point, the material deforms irreversibly and does not return to its original shape and size, even when the load is removed. The breaking stress (or ultimate stress) represents the stress at which the material fractures.

In the case of the given bronze alloy, the stress at which plastic deformation begins is 275 MPa. This means that when the stress applied to the alloy exceeds 275 MPa, the material will undergo plastic deformation and not return to its original shape.

The modulus of elasticity, also known as Young's modulus, represents the material's ability to resist deformation under stress. For the given bronze alloy, the modulus of elasticity is 115 GPa. This value indicates that the alloy is relatively stiff, requiring a high load to achieve a significant strain.