Angular Deformation

Angular deformation refers to the change in the angle contained by two sides. When there is a change in the angle between two sides, it indicates a rotation or twisting motion. The average of this angle change can be considered as the angular deformation.

Explanation:

When two sides are connected at a point, they form an angle. This angle can be measured using a protractor or other measuring instruments. If there is a change in the angle between these sides, it means that one side has rotated or twisted with respect to the other side.

For example, consider a simple scenario where you have a rectangular sheet of paper. The two sides of the rectangle are initially perpendicular to each other, forming a 90-degree angle. Now, if you apply a force and twist one side of the rectangle, the angle between the two sides will change. This change in angle is the angular deformation.

Significance:

Angular deformation is an important concept in engineering and mechanics. It helps in understanding the behavior of structures and materials under different loading conditions. By studying the angular deformation, engineers can analyze the stability, strength, and performance of structures.

In civil engineering, angular deformation is particularly important in the design and analysis of structures such as beams, columns, and frames. When a structure is subjected to external forces or loads, it undergoes deformation. This deformation can be both linear and angular.

While linear deformation refers to the change in length or displacement along the direction of the applied force, angular deformation refers to the change in the angle between two sides. Both types of deformation contribute to the overall response and behavior of the structure.

Conclusion:

In summary, when there is a change in the angle contained by two sides, it is referred to as angular deformation. This change indicates a rotation or twisting motion between the sides. Understanding and analyzing angular deformation is crucial in engineering to ensure the stability and performance of structures. Therefore, option C, angular deformation, is the correct answer in this case.