As the failure of Crankshaft causes a serious engine wreck, it is necessary to analyze the Crankshaft to provide maximum rigidity with regard to the stress involved mainly from bending and torsion.

The analysis of Crankshaft contains,

1. To find out the critical stress regions and stress values due to the application of bending.

2. To find out maximum deformation under bending loads.

2.INTRODUCTION:

Crankshaft is a most complicated and strained engine part. Crankshaft composes of moving parts like piston, connecting rod and it transfers engine power. Crankshaft is subjected to cyclic loads due to gas pressure, inertial forces, and their couples. Due to these forces and their moment’s crankshaft under goes stresses of torsion and bending. Apart from this, periodically varying moments cause torsional vibration of crankshaft with resultant additional torsional vibration stresses.

3.STEPS INVOLVED IN STRESS ANALYSIS:

3.1.CREATING 3-D MODEL:

3.2.MESHING OF CRANKSHAFT:

4.LOADS AND BOUNDARY CONDITIONS:

In this case the bending load is applied on the top portion of crank pin. The bottom portion of journal periphery is given Y & Z degrees of freedom fixed and X free for one side. Other side is given only Y degree of freedom fixed and X & Z free.

4.1.BENDING LOAD APPLIED ON TOP PORTION AND JOURNAL IS FIXED:

4.2. BENDING STRESS PLOT (1st Principle Stress):

4.3. VON-MISES STRESSES DUE TO BENDING LOAD: