不同标准几何形状对3D打印聚合物的拉伸性能的影响
Rawabe Fatima Faidallah1, Muammel M Hanon2, Varun Vashist1
1Mechanical Engineering Doctoral School, Szent István Campus, MATE University, Páter Károly u. 1, 2100 Gödöllő, Hungary.
Polymers
|July 29, 2023
概括
在ASTM D3039-0°的样品形状和边缘打印方向为3D打印的PETG带来了优越的拉伸性能. 与ISO标准相比,矩形形状提高了机械性能.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 添加剂制造 添加剂制造 添加剂制造
背景情况:
- 3D打印 (沉积建模) 越来越多地用于聚合物组件.
- 标准化测试对于评估3D打印零件的机械性能至关重要.
- 几何和打印方向显著影响拉伸性能.
研究的目的:
- 为了比较分析不同标准几何形状的3D打印聚合物样本的拉伸性能.
- 评估印刷方向 (平面与边形) 对机械性能的影响.
- 评估样品几何学对应力分布和故障模式的影响.
主要方法:
- 使用化沉积建模 (FDM) 制造聚乙烯二甲酸甘醇 (PETG) 标本.
- 测试ASTM D3039和ISO 527标准几何形状在平面和边缘印刷方向下.
- 测量拉伸强度,弹性模量,应变和破裂时的延伸.
- 用有限元法 (FEM) 分析来识别压力升高的因素.
主要成果:
- 在边缘方向的ASTM D3039-0°标本显示了最高的拉伸性能.
- 在ASTM D3039-0°标本的平面取向显示了破裂区域的最佳结果.
- 无论印刷方向如何,ISO 527-2标本始终表现出较低的拉伸性能.
- ASTM D3039-0°的拉伸强度明显高于 (17.87-21%) 的ISO 527-2标本.
结论:
- 矩形样本几何形状,特别是ASTM D3039,增强了3D打印PETG的拉伸性能.
- 打印方向极大地影响机械性能,边缘方向有利于拉伸强度.
- 了解几何方向交互对于优化3D打印零件设计和性能至关重要.
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