In this paper, the effects of thermal parameters including the deformation temperature, shape recovery temperature, and heating rate on the shape recovery of a specific rounded rectangle structure were investigated using the design of experiments. Three-point bending thermo-mechanical tests were subsequently carried out where water was used for controlling the temperature. It was found that the deformation temperature and heating rate have the most and the least effect on the shape recovery of polylactic acid (PLA) SMPs, respectively. The mathematical modeling results showed that the optimum condition of the highest shape recovery is obtained at the deformation temperature of 53.31°C, recovery temperature of 59.94°C, and heating rate of 8.05°C/min. It was also observed that the shape recovery of the specified rounded rectangle structure manufactured by the 3D printing method was enhanced from 93.03% to 98.14% by optimizing the thermal parameters. Besides, the optimum condition was applied to structures with different cell geometries and it was shown that the obtained condition was also enhanced the shape recovery of structures with diamond and honeycomb. More specifically, the shape recovery of noted structures was significantly enhanced to 98.00% and 97.71 % from 82.86% and 78.89%, respectively.

本文通过实验设计研究了变形温度、形状恢复温度和加热速率等热参数对特定圆角矩形结构形状恢复的影响。随后进行了三点弯曲热机械测试，其中使用水来控制温度。发现变形温度和加热速率分别对聚乳酸 (PLA) SMP 的形状恢复影响最大和最小。数学建模结果表明，在变形温度为53.31℃、恢复温度为59.94℃、升温速率为8.05℃/min的条件下，获得了最高形状恢复的最佳条件。还观察到，通过优化热参数，通过 3D 打印方法制造的指定圆角矩形结构的形状恢复率从 93.03% 提高到 98.14%。此外，将最佳条件应用于具有不同单元几何形状的结构，结果表明所获得的条件也增强了金刚石和蜂窝结构的形状恢复。更具体地说，注意到结构的形状恢复分别从 82.86% 和 78.89% 显着提高到 98.00% 和 97.71%。将最佳条件应用于具有不同单元几何形状的结构，结果表明所获得的条件也增强了金刚石和蜂窝结构的形状恢复。更具体地说，注意到结构的形状恢复分别从 82.86% 和 78.89% 显着提高到 98.00% 和 97.71%。将最佳条件应用于具有不同单元几何形状的结构，结果表明所获得的条件也增强了金刚石和蜂窝结构的形状恢复。更具体地说，注意到结构的形状恢复分别从 82.86% 和 78.89% 显着提高到 98.00% 和 97.71%。