EARTH SCIENCE
STRUCTURAL GEOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Stress is simply the ratio of force applied to its cross-sectional area.
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Deformation is closely related to strain but they are not the same.
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Strain is expressed as change in length or volume over its original length or volume.
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Shear stress occurs when a force is acting upon the parallel area of the material.
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Detailed explanation-1: -The shear component acts parallel to the surface. The “surface” can also be a plane inside of an object. The action of a force on a surface produces a stress, which has units of force per area, such as pascals (1Pa=1N/m2 1 P a = 1 N / m 2 ). In the case of a shear force, the stress is called the shear stress, .
Detailed explanation-2: -Explanation: Shear stress is defined as the force acting per unit area. Thus, the unit of shear stress is equal to N/m2. Since, 1 Pa =1 N/m2, Pascal is the most suitable one. Explanation: Shear stress is caused due to friction between fluid particles.
Detailed explanation-3: -Shear stress is defined as the component of stress that acts parallel to a material cross section. The most common source of shear stress occurs when forces are applied directly parallel to a surface like the fluid shear stress that occurs in vascular tissue from flowing blood interacting with the vessel wall.
Detailed explanation-4: -Shear Stress. When a force acts perpendicular (or “normal") to the surface of an object, it exerts a normal stress. When a force acts parallel to the surface of an object, it exerts a shear stress.