Plasticity (physics)

High school (ages 12+)
Science & Technology

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/plasticity-physics

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the primary mechanism (metals)?Movement and interaction of dislocations within the crystal lattice
2. What is the key constitutive models?Von Mises yield criterion, associated flow rule, strain hardening models
3. What is plasticity in materials?Plasticity is when a material keeps its new shape after being stretched or squished, instead of going back to its original shape.
4. How does plasticity happen in metals?In metals, plasticity happens when tiny defects called dislocations move, letting layers of atoms slide past each other and change the metal's shape permanently.

Yield Criterion: A condition that defines the stress state at which plastic deformation begins.
Dislocation: A linear crystallographic defect or irregularity within a crystal structure.
Strain Hardening: The process by which a material becomes stronger and harder as it is plastically deformed.
Rheology: The study of the flow of matter, primarily in a liquid state, but also as 'soft solids'.