Strength of Materials: Simple Strain and Deformation

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What is the unit of measurement for the Modulus of Elasticity of steel?

Megapascals (MPa) (correct)
Millimeters per millimeter (mm/mm)
Radians
Pounds per square inch (psi)

What happens to a material when it is subjected to loads and its modulus of elasticity is high?

It breaks or fractures
It bends or flexes easily
It undergoes plastic deformation
It maintains its shape and does not deform (correct)

What type of strain occurs when the layers of a material slide past each other due to applied forces?

Normal strain
Tensile strain
Axial strain
Shear strain (correct)

What is the dimension of the strain quantity?

Dimensionless (B) Signup and view all the answers

What is the typical range of the Modulus of Elasticity for structural steel?

200,000 to 210,000 MPa (A) Signup and view all the answers

What type of deformation occurs when a material returns to its original shape after stress is removed?

Elastic deformation (C) Signup and view all the answers

What is the main assumption in determining stresses in thin-walled pressure vessels?

The stresses are uniformly distributed (A) Signup and view all the answers

Which of the following is a fundamental concept in the study of strength of materials?

Hooke's Law (D) Signup and view all the answers

What is the primary difference between normal (axial) strain and shear strain?

Direction of deformation (C) Signup and view all the answers

At what point on a stress-strain diagram does the material begin to deform plastically?

Elastic limit (B) Signup and view all the answers

What is the term for the ratio of lateral contraction to longitudinal extension in a material?

Poisson's Ratio (A) Signup and view all the answers

Which of the following is a characteristic of material behavior within the proportional limit?

Linear stress-strain relationship (A) Signup and view all the answers

What is the relationship between deformation and strain in materials?

If there is deformation, there is strain, and if there is strain, there is deformation (C) Signup and view all the answers

According to Hooke's Law, what is the relationship between stress and strain in a material?

σ = Eϵ (B) Signup and view all the answers

What is the Young's modulus of elasticity (E) a measure of in a material?

The material's stiffness (A) Signup and view all the answers

What is the primary difference between a material's proportional limit and its elastic limit?

The proportional limit is the point of linear stress-strain behavior, while the elastic limit is the point of plastic deformation (A) Signup and view all the answers

What occurs when a material undergoes plastic deformation?

The material's shape and size change permanently (C) Signup and view all the answers

What is the primary purpose of a stress-strain diagram?

To determine a material's proportional and elastic limits (D) Signup and view all the answers