Geometrically Nonlinear Analysis of the Operation of a Shape Memory Alloy Force Actuator

Abstract—A geometrically nonlinear description of the operation of a multiple-action force actuator, which consists of a shape memory alloy working body and a linear displacement body, is performed. The relative error that appears when this problem is solved in a geometrically linear formulation is shown to increase with phase-structural strain of the working body, and it can exceed 20% for some parameters.