When the length of the body changes its length by normal stress that is applied is known as Longitudinal Stress.
Volume Stress is the stress in which the volume of body changes due to the stress. Normal stress on a body causes change in length or volume and tangential stress produces the change in the shape of the body is called volume stress. A body that is under the force of pressure p, when submerged in a liquid, the body confront the force that is perpendicular to the surface of the body.
Shearing Stress is a force applied tangentially over the surface area of the plane. When the forces being applied to the surface is parallel to it and the stress which is acting on the surface also plots a tangent. This kind of stress is known as Shearing Stress.
The force per unit area is defined as Tensile Stress. If the stress is applied then the length of the body is increasing because of the force. Tensile stress is observed when a rod is stretched under motion’s third law. Rubber is a common example of tensile stress. It is the quantity associated with stretching. It is denoted by σ.
When we apply a tangential force on the body the shape and volume of the body are changed. When the compression stress has applied the length of the body is decreased. Compression stress is opposite to the Tensile Stress. If you’ve ever squeezed a pet’s squeak toy in your hand, you are creating the compression stress on the body.
When we expressed as force per unit area that is normal stress and tangential stress respectively. When two equal and opposite deforming forces are applied parallel to the cross-sectional area of an object, there is relative displacement between the opposite faces of the body, and the restoring force per unit area developed due to the applied tangential force is known as tangential stress.
Hydraulic stress is the measure of the internal force per unit area acting on the liquids. Hydraulic Stress is the restoring force per unit area when the force is applied by the fluid on the body. Stress is not physically the same as pressure, because in pressure external force per unit area is considered, but in stress, it is the internal force per unit area. In the case of liquids to the hydraulic stress is defined in the same way.
The radial stress is for thick walled-cylinder, which is equal and opposite to the gauge pressure on the inside surface and zero on the outside surface. The circumferential stress and longitudinal stress is larger than radial stress so radial stress is neglected.