Question

What is the characteristic of an elastoplastic material with strain hardening?

1) It exhibits both elastic and plastic deformation
2) It exhibits only elastic deformation
3) It exhibits only plastic deformation
4) It exhibits neither elastic nor plastic deformation

Answer 1

An elastoplastic material with strain hardening exhibits both elastic and plastic deformation.

Step-by-step explanation:

An elastoplastic material with strain hardening exhibits both elastic and plastic deformation.

When stress is gradually increased beyond the elastic limit, the material undergoes plastic deformation, meaning it deforms irreversibly and does not return to its original shape and size even when the load is removed.

Materials with strain hardening, such as metals, show a gradual decrease in stress with increasing strain, becoming easier to deform as stress-strain values approach the breaking point.

Answer 2

An elastoplastic material with strain hardening exhibits both elastic and plastic deformation, with the material becoming harder as it is plastically deformed. "It exhibits both elastic and plastic deformation" is the characteristic of an elastoplastic material with strain hardening. So, the correct option is "1" "It exhibits both elastic and plastic deformation".

Step-by-step explanation:

The characteristic of an elastoplastic material with strain hardening is that it exhibits both elastic and plastic deformation. Initially, when a load is applied to a material, it deforms elastically; that is, it will return to its original shape upon the removal of the load.

This behavior continues up until the elastic limit, which is the maximum stress that can be applied without causing permanent deformation. When stress exceeds the elastic limit, the material begins to experience plastic deformation. Plastic deformation means the material will not return to its original shape after the load is removed.

In the case of strain hardening, the material becomes stronger and harder as it is deformed plastically. The stress-strain diagram for these materials typically shows a region where the stress increases with strain, indicating the hardening effect.

In summary, the correct statement is option 1: It exhibits both elastic and plastic deformation.

"It exhibits both elastic and plastic deformation" is the characteristic of an elastoplastic material with strain hardening. So, the correct option is "1" "It exhibits both elastic and plastic deformation".