Stress,+Strain,+Viscosity

__** Stress, Strain, Viscosity **__ **Strain ** · Quantitative measure of the extent to which an element of a material has been deformed. · Deformation – change of shape, dimension. **Stress **  · Force per unit area.  ·  , where F = force and A = area  · Intensity of force.  · A stress which is applied parallel or tangential to a force of a material as opposed to a normal stress which is applied perpendicularly. **Steady Simple Shearing Flow **  · Shear stress, s <span style="font-family: 'Arial','sans-serif'; font-size: 10pt; line-height: 115%;">= <span style="font-family: 'Calibri','sans-serif'; font-size: 11pt; line-height: 115%; position: relative; top: 10pt;"> <span style="display: block; margin: 0cm 0cm 0pt 108pt; mso-add-space: auto; text-align: justify; text-indent: 36pt; text-justify: inter-ideograph;"><span style="font-family: 'Arial','sans-serif'; font-size: 10pt; line-height: 115%;">= <span style="font-family: 'Calibri','sans-serif'; font-size: 11pt; line-height: 115%; position: relative; top: 9pt;"> <span style="display: block; margin: 0cm 0cm 0pt 108pt; mso-add-space: auto; text-align: justify; text-indent: 36pt; text-justify: inter-ideograph;"><span style="font-family: 'Arial','sans-serif'; font-size: 10pt; line-height: 115%;">= **<span style="font-family: 'Times New Roman','serif'; font-size: 10pt; line-height: 115%;">Pa ** <span style="display: block; margin: 0cm 0cm 0pt 72pt; mso-add-space: auto; text-align: justify; text-indent: 36pt; text-justify: inter-ideograph;"> <span style="display: block; margin: 0cm 0cm 0pt 72pt; mso-add-space: auto; mso-list: l0 level1 lfo3; text-align: justify; text-indent: -18pt; text-justify: inter-ideograph;"> · <span style="font-family: 'Times New Roman','serif'; font-size: 12pt; line-height: 115%;">Shear rate, g <span style="font-family: 'Arial','sans-serif'; font-size: 10pt; line-height: 115%;">= <span style="font-family: 'Calibri','sans-serif'; font-size: 11pt; line-height: 115%; position: relative; top: 10pt;"> <span style="display: block; margin: 0cm 0cm 0pt 36pt; text-align: justify; text-justify: inter-ideograph;"><span style="font-family: 'Arial','sans-serif'; font-size: 10pt; line-height: 115%;">= <span style="font-family: 'Calibri','sans-serif'; font-size: 11pt; line-height: 115%; position: relative; top: 9pt;"> <span style="display: block; margin: 0cm 0cm 0pt 72pt; mso-add-space: auto; text-align: justify; text-justify: inter-ideograph;"><span style="font-family: 'Arial','sans-serif'; font-size: 10pt; line-height: 115%;">= **<span style="font-family: 'Times New Roman','serif'; font-size: 10pt; line-height: 115%;">sec-1 ** <span style="display: block; margin: 0cm 0cm 0pt 72pt; mso-add-space: auto; text-align: justify; text-justify: inter-ideograph;"> <span style="display: block; margin: 0cm 0cm 0pt 72pt; mso-add-space: auto; mso-list: l0 level1 lfo3; text-align: justify; text-indent: -18pt; text-justify: inter-ideograph;"> · <span style="font-family: 'Times New Roman','serif'; font-size: 12pt; line-height: 115%;">Coefficient of viscosity, h = s / g <span style="display: block; margin: 0cm 0cm 10pt 180pt; mso-add-space: auto; text-align: justify; text-justify: inter-ideograph;"><span style="font-family: 'Times New Roman','serif'; font-size: 12pt; line-height: 115%;">= <span style="font-family: 'Times New Roman','serif'; font-size: 10pt; line-height: 115%;">Pa. s  **<span style="font-family: 'Times New Roman','serif'; font-size: 12pt; line-height: 115%;">Viscosity ** <span style="display: block; margin: 0cm 0cm 0pt 72pt; mso-add-space: auto; mso-list: l0 level1 lfo3; text-align: justify; text-indent: -18pt; text-justify: inter-ideograph;"> · h <span style="color: black; font-family: 'Times New Roman','serif'; font-size: 12pt; line-height: 115%;">is different at different T <span style="display: block; margin: 0cm 0cm 0pt 72pt; mso-add-space: auto; mso-list: l0 level1 lfo3; text-align: justify; text-indent: -18pt; text-justify: inter-ideograph;"> · <span style="color: black; font-family: 'Times New Roman','serif'; font-size: 12pt; line-height: 115%;">Internal resistance to flow. <span style="display: block; margin: 0cm 0cm 0pt 72pt; mso-add-space: auto; mso-list: l0 level1 lfo3; text-align: justify; text-indent: -18pt; text-justify: inter-ideograph;"> · <span style="color: black; font-family: 'Times New Roman','serif'; font-size: 12pt; line-height: 115%;">Resistance to being deformed either by shear stress / extensional force. <span style="display: block; margin: 0cm 0cm 0pt 72pt; mso-add-space: auto; mso-list: l0 level1 lfo3; text-align: justify; text-indent: -18pt; text-justify: inter-ideograph;"> · <span style="color: black; font-family: 'Times New Roman','serif'; font-size: 12pt; line-height: 115%;">SI unit : Pa.s <span style="display: block; margin: 0cm 0cm 10pt 72pt; mso-add-space: auto; mso-list: l0 level1 lfo3; text-align: justify; text-indent: -18pt; text-justify: inter-ideograph;"> · <span style="color: black; font-family: 'Times New Roman','serif'; font-size: 12pt; line-height: 115%;">Cg unit : Poise


 * Variables that affect viscosity**
 * **shear rate**
 * **time of shearing**
 * **temperature**
 * **pressure**