### Poissons Ratio

• Describe and define Poisson’s ratio.

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#### 41-3-01

The value of Poisson’s ratio for steel is between:

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#### 41-3-02

Poisson’s ratio is defined as the ratio of:

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#### 41-3-03

A bar of 30 mm diameter is subjected to a pull of 60 kN. The measured extension on gauge length of 200 mm is 0.1 mm and change in diameter is 0.004 mm. Calculate Poisson’s ratio.

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#### 41-3-04

Poisson's ratio of a material is 0.5. Percentage change in its length is 0.04%. What is the change in percentage of diameter?

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Which of the following statements is NOT true?

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#### 41-3-06

Which of the following describes the concept of Poisson's ratio most accurately?

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What is the unit of the modulus of elasticity?

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#### 41-3-08

Within elastic limit, the volumetric strain is proportional to the hydrostatic stress. What is the constant that relates these two quantities called?

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#### 41-3-09

What is another term for modulus of rigidity?

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#### 41-3-10

The ratio of lateral strain to the linear strain within elastic limit is known as:

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Young’s modulus is defined as the ratio of:

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The materials having same elastic properties in all directions are called:

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#### 41-3-13

The value of modulus of elasticity for mild steel is of the order of:

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#### 41-3-14

A metallic rod of 500 mm length and 50 mm diameter, when subjected to a tensile force of 100 kN at the ends, experiences, an increase in its length by 0.5 mm and a reduction in its diameter by 0.015 mm. The Poisson's ratio?

Solution:

Lateral strain $=\dfrac {0.015}{50}=0.003$

Longitudinal strain $=\dfrac {0.5}{500}=0.001$

Poisson's ratio $\nu =\dfrac {0.0003}{0.001}=0.3$