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Stress Units and Relationship with Force and Area

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Stress Units and Relationship with Force and Area

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Questions and Answers

What type of deformation occurs when a tensile force is applied?

Elongation (correct)

Torsion

Shear

Compression

How is strain, ε, defined?

The change in volume per unit original volume

The change in angle per unit original angle

The change in cross-sectional area per unit original area

The change in length per unit original length (correct)

What is the unit of strain?

Meters

Dimensionless (correct)

Newtons

Pascals

What is the strain if a wire with an original length of 2 mm is deformed to a new length of 2.02 mm?

0.01 or 1% Signup and view all the answers

What is the difference between elastic and plastic strain?

Elastic strain can be recovered, plastic strain cannot Signup and view all the answers

What is the clinical importance of strain in dental restorative materials?

Strain can cause failure of dental implant screws Signup and view all the answers

How can orthodontic wires be used without fracturing?

By bending and adjusting the wires Signup and view all the answers

What is the importance of strain in impression materials?

Strain allows the impression material to recover without permanent distortion Signup and view all the answers

What happens to the lateral dimension of a material during axial loading?

It contracts Signup and view all the answers

What is the relationship between axial and lateral strain during axial loading?

They are inversely proportional Signup and view all the answers