在固化过程中为3D打印层模拟曲.
Andrey Filippov1, Todd H Weisgraber2, Fangyou Xie3
1Divisions of Computational Engineering, Lawrence Livermore National Laboratory, Livermore, California, USA.
3D printing and additive manufacturing
|September 11, 2025
概括
本研究对3D打印的结构进行了建模,考虑了表面张力和温度对材料性能和流动的影响. 该研究使用一种新型建模方法模拟印刷部件的变形.
科学领域:
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
- 计算建模 计算建模
背景情况:
- 弹性体的3D打印具有挑战性,因为它们的复杂质和温度依赖性质.
- 表面张力在制造过程中显著影响印刷层的结构完整性和几何形状.
- 了解和预测印刷结构的变形对于优化制造工艺和材料设计至关重要.
研究的目的:
- 开发一个全面的模型来模拟3D打印的强化聚-二甲基--共-二-结构的行为.
- 研究表面张力,温度和固化程度对聚合物流量和结构变形的影响.
- 为了验证模型使用实验数据从风湿学测量和下垂试验验证模型.
主要方法:
- 采用双相系统模型 (空气和聚合物) 来表示打印层.
- 扩展的赫歇尔-布克利模型,具有温度依赖的参数,描述了聚合物流动.
- 不同扫描热量计 (DSC) 数据为固过程的建模提供了信息.
- 使用各种初始和边界条件进行模拟,以预测结构变形.
主要成果:
- 该模型成功地捕获了表面张力对结构几何变化的影响.
- 材料属性的温度依赖性和固化显著影响了聚合物流动和变形.
- 实验验证证证实了该模型对曲和流动行为的预测能力.
结论:
- 开发的模型为预测3D打印弹性体的行为提供了一个强大的框架.
- 准确的模拟温度依赖性质和固化动力学对于模拟打印结构变形至关重要.
- 这项工作有助于优化基材料的3D打印过程.
相关概念视频
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The mechanics of deformation in curved members, such as beams or arches, under bending moments, involve complex responses. When such a member, symmetric about the y-axis and shaped like a segment of a circle centered at point C, is subjected to equal and opposite forces, its curvature and surface lengths change significantly. This alteration results in the shift of the curvature's center from C to C', indicating a tighter curve.
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