在基于挤出的增材制造中,对粗型聚合物流的模型分析
Haifeng Zhang1, Qinlei Luan1, Wenjun Yuan1
1School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an 710049, China. wenjun.yuan@xjtu.edu.cn.
Soft matter
|February 25, 2026
概括
本研究探讨了材料特性和喷嘴设计如何影响增材制造中的挤出稳定性. 优化的配置大大减少了流动不稳定性和形形成,使3D打印更顺.
科学领域:
- 材料科学 材料科学 材料科学
- 流体动力学 流体动力学
- 增材制造 增材制造 增材制造
背景情况:
- 材料挤出增材制造 (AM) 需要了解挤出过程中复杂的流体体质.
- 锡索托普性弹性玻璃塑料 (TEVP) 液体由于其时间依赖的行为而存在独特的挑战.
研究的目的:
- 为了研究物理参数在AM挤出过程中对材料质的影响.
- 分析喷嘴结构和流体特性对TEVP流体挤出稳定性的影响.
主要方法:
- 利用多lambda同位素动力硬化 (ML-IKH) 模型来预测TEVP流体类风湿学.
- 我们比较了四种类型的风湿学模型,以区分类型的行为.
- 进行了数值模拟,分析压力,高度变化和旋形成.
主要成果:
- 由于分解和积累状态的相互作用,TEVP流体挤出表现出振荡.
- 压力和高度变化率与弹性线性相关,并随着屈服应力而变化.
- 弹性增加导致最大的面积与最小相比增加了两倍.
结论:
- 厚性流体的流动稳定性高度依赖于结构参数.
- 优化喷嘴设计和打印参数可以抑制不稳定性和 vortex 形成.
- 提供了增材制造工艺中提升挤出稳定性的见解.
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