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Load, stress and strain

mayra

Created on February 9, 2023

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Transcript

load, stress and strain

Load

Load is a term frequently used in engineering to mean the force exerted on a surface or body.

A load causes stress, deformation, and displacement in a structure. A structural load or structural action is a force, deformation, or acceleration applied to structural elements. Structural analysis, a discipline in engineering, analyzes the effects of loads on structures and structural elements.5

What is Structural Load Testing?

Types

Live loads are usually variable or moving loads. These can have a significant dynamic element and may involve considerations such as impact, momentum, vibration, slosh dynamics of fluids, etc.

Environmental loads are structural loads caused by natural forces such as wind, rain, snow, earthquake or extreme temperatures.

Dead loads are static forces that are relatively constant for an extended time. They can be in tension or compression.

Stress

In continuum mechanics, stress is a physical quantity that describes the magnitude of forces that cause deformation. Stress is defined as force per unit area.

When an object is pulled apart by a force it will cause elongation which is also known as deformation, like the stretching of an elastic band, it is called tensile stress. But, when the forces result in the compression of an object, it is called compressive stress.

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STRAIN

Strain is related to deformation in terms of relative displacement of particles in the body that excludes rigid-body motions.

A strain is in general a tensor quantity. Physical insight into strains can be gained by observing that a given strain can be decomposed into normal and shear components. The amount of stretch or compression along material line elements or fibers is the normal strain, and the amount of distortion associated with the sliding of plane layers over each other is the shear strain, within a deforming body.

Lorem ipsum dolor sit amet consectetur

Lorem ipsum dolor sit amet consectetur