Volume strain is the modulus associated with the volume change. The strain equal to the change in volume divided by the original volume is referred to as volume strain. The change in the relative volume of the object when a uniform unit of compressive or tensile stress acts on the surface of the object is known as Bulk modulus. The units for the bulk modulus is the pascal. The bulk modulus will then tell us how an object behaves when it is compressed from all its sides equally.

Definition: Bulk modulus is the measure of resistance that the material offers towards uniform compression. Quantitatively, it measures the extent to which a substance is incompressible. The higher the bulk modulus, the less compressive the material is

Formula

Bulk modulus formula is given,

 

Where,

• K= bulk modulus in Pascal

• ∆P denotes change in pressure in Pascal

• ∆V denotes the change in volume in m3

• V denotes the actual volume of the object in m3

Solved Problem 

Explain: In ammunition testing center pressure 255 MPa. Determine the percentage change of volume of the piece of copper for the piece when subjected to pressure in percentage. Bulk modulus of copper is 1.38 x       Pa.

Solution:

The pressure in the testing center is 255 MPa.

Bulk modulus,K = V(∆P) / ∆V

Substituting the values,

Therefore, the change in volume percentage is 0.184 %

 

Other Related Sections

NCERT Solutions | Sample Papers | CBSE SYLLABUS| Calculators | Converters | Stories For Kids | Poems for kids| Learning Concepts I Practice Worksheets I Formulas | Blogs | Parent Resource