Strength of Materials

  Mohr’s circle for stress on an oblique section of a body subjected to direct stresses in two mutually perpendicular faces. Detailed step by step procedure to draw the mohr's circle for a body subjected to direct stresses in two mutually perpendicular faces (When both stresses are of tensile nature) Things to remember before drawing mohr's circle  👉tensile stress is taken as positive and compressive stress is taken as negative. 👉 you can use appropriate scale  Step 1. Draw a straight line OB length equals to σx Step 2. Mark a point A on line OB and Length of OA is equal to σy . Step 3. Mark Mid point C of line joining A and B Step 4. Draw a circle With mid point C and passing through points A and B Step 5. Locate an inclined plane in this circle by marking a radial line CD at double the angle 2θ at which the required plane is inclined with a given plane. Step 6. Draw DE  perpendicular from D to x-axis. Now the mohr's circle is completed  Now we have to find the result va

Strength of Materials  The strength of any material can be defined in terms of Stress. Stress is the only way by which strength can be defined.  And the Stress is defined as follows: Stress (σ) When a material is subjected to an external force, a resisting force induced within the component. The internal resistance force induced per unit area due to external force acting on a material or intensity of the forces distributed over a given section is called the stress at a point.  Stress is donated by  σ                               σ=P/A                Where P is External Force applied                                                                 A is Cross-Sectional Area When Force (P) is acting on the material is tends to split it into two  pieces P is in terms of Newton (N) and A as original area (Before applying external force (P)), in square meters ( m 2 ), the stress  σ  will be expresses in N/  m 2 . This unit is called Pascal (Pa). Units of stress 1 kPa = 10 3 Pa = 10 3 N/