Stress Analysis of High Speed Four Bar Mechanism

The multi-body four bar mechanical system is an rigid links assemblage of assumed revolute joints and crank rotating motion for complete cycle, the links which produce relative motion. In higher speed mechanisms the assumption of rigid body links will not be valid, as the links are subjected to grater deformations. The high-speed activation of four bar mechanism demands that the members of the operating mechanism be tough, durable, flexible and safe to withstand axial stresses and undue vibrations. The analysis of the four bar mechanism can be performed by using kinematic coefficients method and theoretical vector loop, multi body dynamic analysis soft wares and by using Video graphic analysis etc,. Commonly such mechanisms are analyzed using CAD packages, e.g. ANSYS, ADAM etc. The stress analysis of a four bar mechanism (at higher operating speeds ) is analyzed to find the limiting high speed of the four bar mechanism and the results are presented.