|
THIS WORK EXPLORES THE PROPERTIES OF SOME SMART MATERIALS LIKE PIEZOELECTRIC MATERIALS OR SHAPE MEMORY ALLOYS FOR USE IN INTELLIGENT STRUCTURES. THE USE OF THESE MATERIALS HAS GROWING VERY FAST IN RECENT YEARS, AND TODAY THEY OCCUPY AN IMPORTANT POSITION IN SOME HIGH-TECHNOLOGICAL APPLICATIONS, AS SPATIAL DEVICES AND BIOMECHANICS. THE REMARKABLE PROPERTIES OF THESE MATERIALS MOTIVATE THEIR APPLICATION IN MANY SITUATIONS, WHICH MAY INCLUDE AMONG OTHERS, STRUCTURAL VIBRATION CONTROL AND CONTROL OF DEFLECTION IN STRUCTURES. IN THIS STUDY IT IS PRESENTED A SIMPLE DISPLACEMENT-BASED FINITE ELEMENT MODEL OF A COMPOSITE BEAM WITH AN EMBEDDED OR BONDED SMART ACTUATOR AND ITS BEHAVIOR IS STUDIED CONSIDERING THE USE OF THE ACTUATOR TO CONTROL THE BEAM ACTIVELY OR PASSIVELY. THE BERNOULLI-EULER HYPOTHESIS IS USED, AND THE ACTUATOR CAN BE USED AS A LAMINA OR A WIRE. THE POSSIBILITIES EXPLORED ARE THE USE OF THE ACTUATOR FOR DEFLECTION CONTROL OR VIBRATION CONTROL, BY CHANGING ITS RESIDUAL STRAIN. AN INTERESTING ASPECT OF THE MODEL IS THAT THE BASIC PRINCIPLES PRESENTED HERE CAN BE EASILY EXTENDED TO OTHER STRUCTURAL ELEMENTS, AS PLATES, SHELLS OR TIMOSHENKO BEAMS.
KEY WORDS: SMART MATERIALS, INTELLIGENT STRUCTURES, VIBRATION CONTROL |
