Introduction:-

In previous studies, we have undergone a fundamental course in solid object mechanics, more commonly referred to as engineering mechanics or applied mechanics. Mechanics are thus divided into three branches: mechanics of solid objects, mechanics of deformed objects, fluid mechanics.

Mechanics of Solid Objects Objects are assumed to be perfectly solid, ie, there is no deformation of objects under the influence of loads which are subject to static statistics and dynamics are two sections of solid object mechanics that contain stationary and moving objects respectively under load.

Stress:-

I. The resistance strength of each unit is provided by a body against deformation known as stress. When the body is exposed to external loading, the body is exposed to some deformation. At the same time, the internal strength of the resistance is due to the cohesion of molecules within the body. Thus, stress is caused in the body when the outer work of the load

Second. If the body is able to resist the external load, it is said to be stable, in equilibrium and therefore, the internal resistance strength must be equal to the external load.

By definition stress = strength of resistance / cross sectional area

Or stress = P / A

torsion:-

As the body produces resistance to external load, it is subject to some distortion. The extent of deformation depends on the properties of materials such as molecular cohesion. The percentage change in the dimension is defined by the strain.

Since the strain is proportion, it has no units. We must refer to a dynasty with a letter H. If L is the original dimension, then the dimension is changed

Strain = change in dimension / original dimension

Types of Stress: -

1) Direct stress and direct strain:

When the strength of the resistance acts naturally or perpendicular to the area on which it operates, the resulting stress is called direct or normal stress and is referred to as the corresponding stress as direct stress.

We should refer to direct stress with the letter "f". Direct stress can be stressful in nature.

2) tensile stress: -

When the resistance force operates away from the cross-sectional area, the direct pressure is of a tensile nature. Tensile pressures tend to cause an increase in the original dimension.

3) Compressor pressure: -

When the strength of resistance towards the cross-sectional area works, direct pressure is of a pressing nature. Procedural pressures tend to cause a reduction in the original dimension.