Er Damper Impact Performance Study

Electrorheological(ER) fluid is a new type of smart materials, and has been used in many engineering fields because of its ER effects. It is predicted that ER fluid will lead to a new technological revolution. ER effects are as follows: the viscosity and shear stress of ERF will increase as the electric field increases, and it will change from liquid to similar solid. ERF has the advantages of reversibility, quick response, easy control, simple structure and low energy dissipation, and has been used in mount, valve, clutch and dampers, etc. ER damper has controllable resistance and marked effects in vibration suppression. ER damper has been studied in the application of low velocity impact, but not reported in large force impact yet. The thesis mainly discuss the property of ER damper as bumper in large force impact. According to the ERF behavior, we can use it to design a new type damper: real-time, controllable, and carry out a combined theoretical and experimental research of the ER damper about impact resistance. Experiments show that the ER damper has little effect in large force impact using current ERF, and theoretical analysis also prove the conclusion. Consequently, we discover some problems to be resolved and put forward proposals to improve the effect of the ER bumper.