通过选择性激光烧结生产的聚胺12的超粘弹性进行实验和理论研究
Mahmoud Kadkhodaei1,2, Marek Pawlikowski2, Rafał Drobnicki2
1Department of Mechanical Engineering, Isfahan University of Technology, Isfahan, Iran.
PloS one
|July 29, 2024
概括
这项研究模拟了使用选择性激光烧结 (SLS) 制造的3D打印聚胺12 (PA12) 部件的机械行为. 开发的超粘弹性模型准确地预测了各种负载条件下的材料反应.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 聚合物科学 聚合物科学
背景情况:
- 聚胺12 (PA12) 广泛用于增材制造,特别是选择性激光烧结 (SLS).
- 了解SLS生产的PA12的机械行为对于预测3D打印组件的性能至关重要.
- 现有的知识差距阻碍了PA12复杂机械反应的精确表征.
研究的目的:
- 开发和验证SLS生产的聚胺12的超粘弹性行为的一个组成模型.
- 在单调,循环和应力放松条件下准确预测3D打印PA12部件的机械反应.
- 为了证明模型对复杂几何结构 (如泛图结构) 的适用性.
主要方法:
- 使用选择性激光烧结 (SLS) 制造了PA12的标准拉力样本.
- 实验测试包括单调和循环张力测试,以及压力放松实验.
- 一个基于应变和时间依赖函数的卷积积分的构成模型被开发和校准.
主要成果:
- 实验力-位移反应与超粘弹性材料模型保持一致.
- 提出的构成模型准确地预测了标准拉力样本的行为.
- 该模型的有限元实现与3D打印的泛图结构的实验结果有很好的一致性.
结论:
- 开发的超粘弹性构成模型有效地捕捉了SLS生产的聚胺12的机械行为.
- 该模型提供了一个可靠的工具,用于预测3D打印PA12部件在各种应用中的性能.
- 该研究验证了该模型对通过SLS制造的复杂结构的分析能力.
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