用有限元法（FEM）模拟柔性磁性复合材料结构的光控驱动
Modeling light-controlled actuation of flexible magnetic composite structures using the finite element method (FEM)
摘要：
光活性材料在各种应用中具有很大的前景。提出了一种光控柔性磁性复合结构的有限元模型，该结构由33.3%的二氧化铬（CrO2）和66.7%的聚二甲基硅氧烷（PDMS）组成。该结构具有8 mm x 2 mm x 100 um的尺寸，并且先前已经进行了实验研究。由于居里温度低，该结构充当致动器，在外部磁场下显示出显著的偏转和由于激光加热而产生的弛豫。使用有限元模型进行了热和磁偏转分析。模拟结果表明，在303 K（室温），30 mT的磁通量密度和160 mW的激光功率时，最大的结构偏转为6.08 mm（76%的结构长度）。我们将提出的模拟模型的结果和实验数据再现先前观察到的运动（CrO2+PDMS）的比较。该模型将使未来的断裂和疲劳分析以及扩展到新的光敏几何形状。
英文摘要：
Photoactive materials hold great promise for a variety of applications. We present a finite element model of light-controlled flexible magnetic composite structure composed of 33.3% Chromium dioxide (CrO2) and 66.7% Polydimethylsiloxane (PDMS) by weight. The structure has a dimension of 8 mm x 2 mm x 100 um and has been previously experimentally studied. Due to the low Curie temperature, the structure acts as an actuator, shows significant deflection under the external magnetic field and relaxation due to laser heating. Thermal and magnetic deflection analysis has been performed using the FEM model. The simulation results show a maximum structural deflection of 6.08 mm (76% of the length of the structure) when subjected to 30 mT magnetic flux density and 160 mW laser power at 303 K (room temperature). We will present the results of the simulation model and comparison to experimental data reproducing the previously observed motion of the (CrO2+PDMS). This model will enable future fracture and fatigue analysis as well as extension to new photoactive geometries.
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