Numerical and experiment of morphing skin based on equivalent thermoelastic energy method
To simplify the modeling,an equivalent simulation method was proposed to convert the transformation energy of SMA into the thermoelastic strain energy of elastic plate and express it by temperature difference.The equivalent approach and Boyd-Lagoudas extended model were compared and analyzed for a SMA wire model.According to the compiled physical property subroutine of SMA based on the Boyd-Lagoudas extended model,twinned martensite other than conventional detwinned martensite and austenite was considered.The maximum error of the equivalent model was 9.8％,proving its effectiveness and accuracy.For the active morphing skin composed of stainless steel and one-way SMA,the variation magnitude of the wing arc height calculated by the equivalent approach was 4.03 mm,consistent with the experimental value of 3.81 mm.It indicated that the equivalent thermoelastic energy method was effective to carry out full-scale wing simulation and rapid design iteration.
morphing skinthermal elastic stress energyshape memory alloyequivalent methodfinite element simulation
万方数据
维普
