Enhanced Computational Modeling of Shape Memory Alloys and Its Applications to Honeycomb Analysis

概要

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Among many functional structures, the low shear stiffness type shape memory alloy (SMA) honeycomb structure is considered as an ideal candidate for actuator, sensor, and shape control devices. This work extends conventional SMA computational models with essential functions such as consideration of twinned martensite, support for plastic deformation, and enhancement for hysteresis behavior model. Using these improved models, we conducted numerical studies related to low shear stiffness type SMA honeycomb structures. Fundamental studies related to tensile and compressive loading behavior were conducted first, followed by simulation of the honeycomb core actuator considering simultaneous changes in temperature and stress level. In the field of simulation, this is the first comprehensive study related to SMA honeycomb structures. Both model validation and new discoveries could be expected from this work.