Engineering Physics: Stress and Strain

Strain is the ratio of change in length to the original length, change in volume to original volume, or the angle through which a surface is displaced with respect to an opposite fixed surface.

The factor of safety is the ratio of breaking stress to working stress, indicating how much stronger a system is than it needs to be for an intended load.

A material remains elastic if the stress applied is below the working stress; if the stress exceeds this limit, it leads to permanent deformation known as breaking stress.

<p>Tangential stress is defined as the force applied per unit area, and shear strain is the ratio of the change in length to the length under shear stress.</p> Signup and view all the answers

<p>If the applied stress exceeds a certain value, the material fails to restore its elastic nature and remains permanently deformed.</p> Signup and view all the answers

<p>Materials exhibiting plasticity maintain a deformed condition even after the removal of the deforming force.</p> Signup and view all the answers

<p>Young's Modulus of Elasticity is the ratio of tensile stress to tensile strain, calculated as $Y = \frac{F/A}{\Delta L/L}$.</p> Signup and view all the answers

<p>Stress is expressed as $Stress = \frac{deforming \ force}{Area}$, or $S = \frac{F}{A}$.</p> Signup and view all the answers

<p>Tensile strain quantifies the ratio of change in length to the original length, calculated as $Tensile \ strain = \frac{\Delta L}{L}$.</p> Signup and view all the answers

<p>Young's Modulus relates to longitudinal stress and strain while Bulk Modulus is the ratio of volume stress to volume strain.</p> Signup and view all the answers