Dynamic stability analysis of a composite material planar mechanism by the finite element method

Vibration analysis has become one of the most important considerations in the design of machines for high-speed operation. Dynamic stability may occur in high-speed flexible mechanisms. The use of composite materials which possess high strength to weight and high stiffness to weight ratios may improve these problems. The Euler beam theory is used to study the dynamic stability of a planar four-bar mechanism made from composite material. The operation condition is assumed to be at a steady dynamic state. The Ritz finite element procedure is used to solve the dynamic stability problem. The advantages of using composite materials are demonstrated.